/* ===========================================================
   ZUVANO TECHNOLOGIES — Design System
   =========================================================== */

/* ---------- Tokens ---------- */
:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.85rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.97rem + 0.18vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.25rem + 1vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.4rem + 2.2vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1.4rem + 3.6vw, 4.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --font-display: 'Cabinet Grotesk', 'Satoshi', 'Segoe UI', sans-serif;
  --font-body: 'Satoshi', 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --shell: 1240px;
  --nav-h: 72px;

  /* Brand constants */
  --brand-orange: #ff9a3d;
  --brand-orange-deep: #e3701a;
  --brand-cyan: #00e5ff;
  --brand-purple: #7b61ff;
}

/* Dark (default) */
:root,
[data-theme='dark'] {
  --bg: #050816;
  --bg-deep: #02040c;
  --surface: rgba(255, 255, 255, 0.042);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(148, 179, 255, 0.14);
  --border-strong: rgba(148, 179, 255, 0.26);
  --text: #f8fafc;
  --text-muted: #9fb0cc;
  --text-faint: #6d80a0;
  --accent: #ff9a3d;
  --accent-ink: #1a0f02;
  --cyan: #00e5ff;
  --purple: #8f7bff;
  --grid-line: rgba(126, 163, 255, 0.075);
  --glow: rgba(255, 154, 61, 0.22);
  --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, 0.75);
  --code-bg: rgba(3, 7, 20, 0.72);
}

/* Light */
[data-theme='light'] {
  --bg: #f4f7fd;
  --bg-deep: #e9eef8;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-2: #ffffff;
  --border: rgba(10, 17, 40, 0.11);
  --border-strong: rgba(10, 17, 40, 0.2);
  --text: #0a1128;
  --text-muted: #4d5b78;
  --text-faint: #7787a3;
  --accent: #c2560b;
  --accent-ink: #fff6ed;
  --cyan: #0b7c94;
  --purple: #5a44c9;
  --grid-line: rgba(10, 17, 40, 0.055);
  --glow: rgba(255, 154, 61, 0.18);
  --shadow-lg: 0 20px 50px -22px rgba(10, 17, 40, 0.28);
  --code-bg: rgba(10, 17, 40, 0.045);
}

/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
* {
  margin: 0;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--space-6));
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
}
img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}
img {
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.08;
  letter-spacing: -0.022em;
  font-weight: 700;
  text-wrap: balance;
}
h1 {
  font-size: var(--text-2xl);
}
h2 {
  font-size: var(--text-xl);
}
h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
p {
  text-wrap: pretty;
}
::selection {
  background: var(--brand-orange);
  color: #12070a;
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 200;
  background: var(--accent);
  color: var(--accent-ink);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--text-sm);
  transition: top 0.2s var(--ease);
}
.skip-link:focus {
  top: var(--space-4);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Ambient background layers ---------- */
.bg-layers {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 78% -6%, rgba(255, 154, 61, 0.14), transparent 62%),
    radial-gradient(900px 560px at 4% 8%, rgba(0, 137, 255, 0.11), transparent 60%),
    var(--bg);
}
.bg-grid {
  position: fixed;
  inset: -2px;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 120% 85% at 50% 0%, #000 35%, transparent 100%);
  animation: grid-drift 26s linear infinite;
}
@keyframes grid-drift {
  to {
    background-position: 56px 56px;
  }
}
#particle-field {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.6;
}
[data-theme='light'] #particle-field {
  opacity: 0.4;
}

/* Cursor glow */
#cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 420px;
  height: 420px;
  margin: -210px 0 0 -210px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, var(--glow), transparent 68%);
  opacity: 0;
  transition: opacity 0.4s ease;
  will-change: transform;
}
body.cursor-active #cursor-glow {
  opacity: 1;
}

/* ---------- Layout ---------- */
.shell {
  width: min(100% - 2.5rem, var(--shell));
  margin-inline: auto;
}
.shell--narrow {
  width: min(100% - 2.5rem, 820px);
  margin-inline: auto;
}
main {
  position: relative;
  z-index: 1;
}
section {
  position: relative;
}
.section {
  padding-block: clamp(var(--space-16), 6.5vw, var(--space-24));
}
.section--tight {
  padding-block: clamp(var(--space-12), 5vw, var(--space-20));
}
[hidden] {
  display: none !important;
}
.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  margin: 0;
}

/* Section heading block */
.sec-head {
  max-width: 62ch;
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}
.sec-head--center {
  margin-inline: auto;
  text-align: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: '';
  width: 26px;
  height: 1px;
  background: currentColor;
}
.sec-head p {
  color: var(--text-muted);
  margin-top: var(--space-4);
}
.lede {
  font-size: var(--text-lg);
  color: var(--text-muted);
  line-height: 1.55;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition:
    border-color 0.3s var(--ease),
    background 0.3s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}
.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.brand svg {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: -0.02em;
  line-height: 1;
}
.brand-name span {
  color: var(--accent);
}
.brand-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.2em;
  color: var(--text-faint);
  text-transform: uppercase;
  margin-top: 3px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
  list-style: none;
  padding: 0;
}
.nav-links a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
  border-radius: var(--radius-md);
  transition: color 0.2s var(--ease);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: 2px;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-links a:hover,
.nav-links a[aria-current='page'] {
  color: var(--text);
}
.nav-links a:hover::after,
.nav-links a[aria-current='page']::after {
  transform: scaleX(1);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
/* Header account controls, injected by main.js on every public page. */
.account-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.account-nav__link {
  white-space: nowrap;
}
@media (max-width: 900px) {
  .account-nav__link:not(.btn--cyan) {
    display: none;
  }
}
.icon-btn {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.icon-btn svg {
  width: 18px;
  height: 18px;
}
.theme-toggle .moon {
  display: none;
}
[data-theme='light'] .theme-toggle .moon {
  display: block;
}
[data-theme='light'] .theme-toggle .sun {
  display: none;
}
.nav-toggle,
.nav-cta-mobile {
  display: none;
}
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--brand-orange), var(--cyan));
}

@media (max-width: 1080px) {
  .nav {
    gap: var(--space-4);
  }
  .nav-toggle {
    display: grid;
  }
  .nav-actions {
    margin-left: auto;
  }
  .nav-actions .nav-cta {
    display: none;
  }
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4);
    background: var(--bg);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
    border-bottom: 1px solid var(--border);
    max-height: calc(100dvh - var(--nav-h));
    overflow-y: auto;
    clip-path: inset(0 0 100% 0);
    transition: clip-path 0.4s var(--ease);
  }
  .nav-links.is-open {
    clip-path: inset(0 0 0 0);
  }
  .nav-links a {
    padding: var(--space-4);
    font-size: var(--text-base);
    border-bottom: 1px solid var(--border);
  }
  .nav-links a::after {
    display: none;
  }
  .nav-links .nav-cta-mobile {
    display: block;
    margin-top: var(--space-4);
  }
  .nav-links .nav-cta-mobile a.btn {
    color: var(--accent-ink);
    padding: 0.8125rem var(--space-6);
  }
  .nav-cta-mobile a {
    border-bottom: 0;
  }
}

/* ---------- Buttons ---------- */
.btn {
  --btn-bg: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8125rem var(--space-6);
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--accent-ink);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.005em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease),
    background 0.2s var(--ease);
  isolation: isolate;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(120px 60px at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.35), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -12px var(--brand-orange);
}
.btn:hover::after {
  opacity: 1;
}
.btn:active {
  transform: translateY(0);
}
.btn svg {
  width: 17px;
  height: 17px;
}
.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 12px 30px -16px var(--brand-orange);
}
.btn--cyan {
  background: transparent;
  color: var(--cyan);
  border-color: color-mix(in srgb, var(--cyan) 45%, transparent);
}
.btn--cyan:hover {
  background: color-mix(in srgb, var(--cyan) 12%, transparent);
  box-shadow: 0 12px 30px -16px var(--cyan);
}
.btn--sm {
  padding: var(--space-2) var(--space-4);
  min-height: 38px;
  font-size: var(--text-xs);
}
.btn--block {
  width: 100%;
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--accent);
}
.text-link svg {
  width: 15px;
  height: 15px;
  transition: transform 0.25s var(--ease);
}
.text-link:hover svg {
  transform: translateX(4px);
}

/* ---------- Glass cards ---------- */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  backdrop-filter: blur(14px);
  transition:
    transform 0.4s var(--ease),
    border-color 0.3s var(--ease),
    box-shadow 0.4s var(--ease);
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, color-mix(in srgb, var(--accent) 55%, transparent), transparent 42%, color-mix(in srgb, var(--cyan) 40%, transparent));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}
.card:hover::before {
  opacity: 1;
}
.card h3 {
  margin-bottom: var(--space-3);
}
.card p {
  color: var(--text-muted);
  font-size: var(--text-sm);
}
.card__icon {
  color: var(--accent);
  margin-bottom: var(--space-5);
}
.card__icon svg {
  width: 30px;
  height: 30px;
  stroke-width: 1.4;
}
.card--flat:hover {
  transform: none;
}
.card--pad-lg {
  padding: clamp(var(--space-6), 3vw, var(--space-10));
}
.pdf-viewer {
  margin-top: var(--space-10);
}
.pdf-viewer iframe {
  display: block;
  width: 100%;
  min-height: 760px;
  border: 1px solid var(--line);
  background: #fff;
}
.account-modal[hidden] { display: none; }
.account-modal { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: var(--space-5); }
.account-modal__backdrop { position: absolute; inset: 0; background: rgba(5, 8, 22, .78); backdrop-filter: blur(8px); }
.account-modal__panel { position: relative; width: min(100%, 440px); padding: clamp(var(--space-6), 4vw, var(--space-10)); border: 1px solid var(--line); background: var(--surface); box-shadow: 0 24px 80px rgba(0, 0, 0, .35); }
.account-modal__close { position: absolute; top: var(--space-3); right: var(--space-3); border: 0; background: transparent; color: var(--text-muted); font-size: 1.6rem; cursor: pointer; }
.account-modal__copy { color: var(--text-muted); font-size: var(--text-sm); }
.account-modal__tabs { display: flex; gap: var(--space-2); margin: var(--space-5) 0; border-bottom: 1px solid var(--line); }
.account-modal__tabs button { padding: var(--space-3) var(--space-4); border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--text-muted); cursor: pointer; }
.account-modal__tabs button.is-active { border-color: var(--accent); color: var(--text); }
.account-modal__panel form { display: grid; gap: var(--space-4); }
.account-modal__panel label { display: grid; gap: var(--space-2); color: var(--text-muted); font-size: var(--text-sm); }

/* Grids */
.grid {
  display: grid;
  gap: var(--space-5);
}
.grid--2,
.grid--3,
.grid--4 {
  grid-template-columns: 1fr;
}
@media (min-width: 620px) {
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 860px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1000px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}
.grid > *,
.split > * {
  min-width: 0;
}
.split {
  display: grid;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: center;
}
@media (min-width: 900px) {
  .split {
    grid-template-columns: 1.05fr 0.95fr;
  }
  .split--wide-right {
    grid-template-columns: 0.9fr 1.1fr;
  }
  .split--flip > :first-child {
    order: 2;
  }
}

/* Tag / chip */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
}
.chip {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  white-space: nowrap;
}
.chip--accent {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid color-mix(in srgb, var(--accent) 38%, transparent);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 9%, transparent);
}
.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--glow);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  70%,
  100% {
    box-shadow: 0 0 0 9px transparent;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(var(--space-16), 7vw, var(--space-24)) clamp(var(--space-16), 7vw, var(--space-24));
  overflow: hidden;
}
.hero__grid {
  display: grid;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
  align-items: center;
}
@media (min-width: 1000px) {
  .hero__grid {
    grid-template-columns: 1.02fr 0.98fr;
  }
}
.hero h1 {
  font-size: var(--text-3xl);
  margin-block: var(--space-5) var(--space-6);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(96deg, var(--brand-orange) 10%, #ffc98f 70%, #ffe7cd);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
[data-theme='light'] .hero h1 em {
  background: linear-gradient(96deg, var(--brand-orange-deep) 10%, #a8480f 75%, #7a3208);
  -webkit-background-clip: text;
  background-clip: text;
}
.typer {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--cyan);
  min-height: 1.8em;
  display: flex;
  align-items: center;
  gap: 2px;
}
.typer__prefix {
  color: var(--text-faint);
  margin-right: var(--space-2);
}
.typer__caret {
  width: 9px;
  height: 1.05em;
  background: var(--accent);
  animation: blink 1s steps(2) infinite;
}
@keyframes blink {
  50% {
    opacity: 0;
  }
}
.hero__sub {
  max-width: 54ch;
  color: var(--text-muted);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
}
.hero__visual {
  position: relative;
}
.hero__frame {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
  background: var(--bg-deep);
}
.hero__frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.hero__frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(190deg, transparent 55%, var(--bg) 105%);
  pointer-events: none;
}
.scan-beam {
  position: absolute;
  left: 0;
  right: 0;
  height: 26%;
  top: -26%;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--cyan) 22%, transparent), transparent);
  animation: scan 6.5s var(--ease) infinite;
  z-index: 2;
}
@keyframes scan {
  0% {
    top: -26%;
  }
  60%,
  100% {
    top: 105%;
  }
}
.hero__robot {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}
.holo-card {
  position: absolute;
  z-index: 4;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(14px);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  animation: float-y 7s ease-in-out infinite;
}
.holo-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
.holo-card--a {
  left: -14px;
  top: 12%;
}
.holo-card--b {
  right: -10px;
  bottom: 14%;
  animation-delay: -3.2s;
}
@keyframes float-y {
  50% {
    transform: translateY(-11px);
  }
}
@media (max-width: 640px) {
  .holo-card {
    display: none;
  }
}

/* Marquee of technologies */
.marquee {
  overflow: hidden;
  border-block: 1px solid var(--border);
  padding-block: var(--space-5);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee__track {
  display: flex;
  gap: var(--space-10);
  width: max-content;
  animation: marquee 38s linear infinite;
}
.marquee__track span {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-faint);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
@keyframes marquee {
  to {
    transform: translateX(-50%);
  }
}
.marquee:hover .marquee__track {
  animation-play-state: paused;
}

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat {
  background: var(--bg);
  padding: var(--space-6) var(--space-5);
  position: relative;
}
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.1rem + 2vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--accent);
}
.stat__label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-2);
  letter-spacing: 0.02em;
}

/* ---------- Code window ---------- */
.code-window {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: var(--code-bg);
  backdrop-filter: blur(12px);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}
.code-window__bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.code-window__bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}
.code-window__bar i:first-child {
  background: var(--brand-orange);
}
.code-window__bar span {
  margin-left: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-faint);
}
.code-window pre {
  margin: 0;
  padding: var(--space-5);
  overflow-x: auto;
  line-height: 1.75;
  color: var(--text-muted);
}
.code-window .k {
  color: var(--purple);
}
.code-window .s {
  color: var(--brand-orange);
}
.code-window .c {
  color: var(--text-faint);
  font-style: italic;
}
.code-window .f {
  color: var(--cyan);
}

/* ---------- Timeline ---------- */
.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), var(--cyan), transparent);
}
.timeline li {
  position: relative;
  padding: 0 0 var(--space-8) var(--space-10);
}
.timeline li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
}
.timeline time {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent);
  letter-spacing: 0.08em;
}
.timeline h3 {
  margin: var(--space-2) 0 var(--space-2);
}
.timeline p {
  color: var(--text-muted);
  font-size: var(--text-sm);
  max-width: 58ch;
}

/* ---------- Project / portfolio cards ---------- */
.work-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.work-card {
  display: flex;
  flex-direction: column;
  padding: 0;
}
.work-card__media {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.work-card__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}
.work-card:hover .work-card__media img {
  transform: scale(1.05);
}
.work-card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.work-card__cat {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.work-card__links {
  display: flex;
  gap: var(--space-4);
  margin-top: auto;
  padding-top: var(--space-2);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}
.work-card__links a {
  color: var(--text-faint);
  border-bottom: 1px solid transparent;
  transition: all 0.2s var(--ease);
}
.work-card__links a:hover {
  color: var(--cyan);
  border-bottom-color: currentColor;
}

/* Filters + search */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-8);
}
.search-field {
  position: relative;
  flex: 1 1 260px;
  max-width: 340px;
}
.search-field svg {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-faint);
  pointer-events: none;
}
.search-field input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
}
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
}
.filter-chip {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  min-height: 34px;
}
.filter-chip:hover {
  color: var(--text);
  border-color: var(--border-strong);
}
.filter-chip[aria-pressed='true'] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
}
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-6);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
}
.empty-state svg {
  width: 34px;
  height: 34px;
  margin: 0 auto var(--space-4);
  color: var(--text-faint);
}

/* ---------- Forms ---------- */
.form {
  display: grid;
  gap: var(--space-5);
}
.field {
  display: grid;
  gap: var(--space-2);
}
.field label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.field label .req {
  color: var(--accent);
}
input,
select,
textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  transition:
    border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
  min-height: 46px;
}
[data-theme='dark'] select option {
  background: #0a1128;
}
textarea {
  min-height: 130px;
  resize: vertical;
  line-height: 1.6;
}
input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
input::placeholder,
textarea::placeholder {
  color: var(--text-faint);
}
.field-row {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 640px) {
  .field-row {
    grid-template-columns: 1fr 1fr;
  }
}
.file-drop {
  position: relative;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  background: var(--surface);
}
.file-drop:hover,
.file-drop.is-active {
  border-color: var(--accent);
  color: var(--accent);
}
.file-drop svg {
  width: 26px;
  height: 26px;
  margin: 0 auto var(--space-3);
}
.file-drop input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.file-drop:focus-within {
  border-color: var(--accent);
  outline: 2px solid var(--focus, var(--accent));
  outline-offset: 2px;
}
.newsletter .form-status {
  flex: 1 0 100%;
  padding: var(--space-3) var(--space-4);
}
.newsletter input {
  flex: 1 1 200px;
}
.form-note {
  font-size: var(--text-xs);
  color: var(--text-faint);
}
/* Shown on the submission page while the visitor is signed out. */
.form-gate {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-4) var(--space-5);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  font-size: var(--text-sm);
}
.form-gate p {
  margin: 0;
  color: var(--text-muted);
}
.form-gate[hidden] {
  display: none;
}
.form-status {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  border: 1px solid;
}
.form-status.is-visible {
  display: flex;
}
.form-status--ok {
  border-color: color-mix(in srgb, var(--cyan) 45%, transparent);
  background: color-mix(in srgb, var(--cyan) 10%, transparent);
  color: var(--text);
}
.form-status--err {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}
.form-status svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--cyan);
}

/* ---------- Accordion ---------- */
.accordion {
  border-top: 1px solid var(--border);
}
.acc-item {
  border-bottom: 1px solid var(--border);
}
.acc-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-2);
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-base);
  transition: color 0.2s var(--ease);
}
.acc-trigger:hover {
  color: var(--accent);
}
.acc-trigger svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--accent);
  transition: transform 0.35s var(--ease);
}
.acc-trigger[aria-expanded='true'] svg {
  transform: rotate(45deg);
}
.acc-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s var(--ease);
}
.acc-panel[data-open='true'] {
  grid-template-rows: 1fr;
}
.acc-panel > div {
  overflow: hidden;
}
.acc-panel p {
  color: var(--text-muted);
  font-size: var(--text-sm);
  padding: 0 var(--space-2) var(--space-6);
  max-width: 72ch;
}

/* ---------- Progress / curriculum ---------- */
.meter {
  height: 5px;
  background: var(--surface-2);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.meter > i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand-orange), var(--cyan));
  transition: width 1.4s var(--ease);
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
}
.meta-row strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- Pricing ---------- */
.price-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.price-card--featured {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
}
.price-card--featured::before {
  opacity: 1;
}
.price {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.2rem + 1.6vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}
.price small {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
  font-weight: 400;
  letter-spacing: 0.06em;
  display: block;
  margin-top: var(--space-2);
}
.check-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
}
.check-list li {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}
.check-list svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--accent);
}

/* ---------- Testimonials ---------- */
.carousel {
  position: relative;
}
.carousel__viewport {
  display: flex;
  gap: var(--space-5);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  padding-bottom: var(--space-3);
}
.carousel__viewport::-webkit-scrollbar {
  display: none;
}
.carousel__viewport > * {
  flex: 0 0 min(88%, 400px);
  scroll-snap-align: start;
}
.carousel__nav {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
  margin-top: var(--space-5);
}
.quote {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.quote blockquote {
  margin: 0;
  font-size: var(--text-base);
  color: var(--text);
  line-height: 1.6;
}
.quote blockquote::before {
  content: '“';
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 0.6;
  color: var(--accent);
  display: block;
  margin-bottom: var(--space-3);
}
.person {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: auto;
}
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--accent-ink);
  background: linear-gradient(140deg, var(--brand-orange), var(--brand-orange-deep));
  flex-shrink: 0;
}
.person small {
  display: block;
  color: var(--text-faint);
  font-size: var(--text-xs);
}
.person b {
  font-size: var(--text-sm);
}
.stars {
  display: flex;
  gap: 2px;
  color: var(--brand-orange);
}
.stars svg {
  width: 14px;
  height: 14px;
}

/* ---------- Gallery ---------- */
.gallery-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.gallery-grid figure {
  margin: 0;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.gallery-grid img {
  width: 100%;
  height: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}
.gallery-grid figure:hover img {
  transform: scale(1.05);
}
.gallery-grid figcaption {
  position: absolute;
  inset: auto 0 0;
  padding: var(--space-8) var(--space-4) var(--space-4);
  background: linear-gradient(transparent, rgba(2, 4, 12, 0.88));
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: #f8fafc;
}
.gallery-grid .span-2 {
  grid-column: span 2;
}
@media (max-width: 700px) {
  .gallery-grid .span-2 {
    grid-column: span 1;
  }
}

/* ---------- Tech cloud ---------- */
.tech-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  font-size: var(--text-sm);
  font-weight: 600;
  backdrop-filter: blur(10px);
  transition:
    transform 0.3s var(--ease),
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease),
    color 0.3s var(--ease);
  cursor: default;
}
.tech-pill i {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  transition: box-shadow 0.3s var(--ease);
}
.tech-pill:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 10px 28px -14px var(--brand-orange);
}
.tech-pill:hover i {
  box-shadow: 0 0 10px 2px var(--glow);
}

/* ---------- Slider (project detail) ---------- */
.slider {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  position: relative;
  background: var(--bg-deep);
}
.slider__track {
  display: flex;
  transition: transform 0.6s var(--ease);
}
.slider__track img {
  width: 100%;
  flex: 0 0 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.slider__ctrl {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  backdrop-filter: blur(10px);
  cursor: pointer;
  color: var(--text);
}
.slider__ctrl:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.slider__ctrl svg {
  width: 18px;
  height: 18px;
}
.slider__ctrl--prev {
  left: var(--space-4);
}
.slider__ctrl--next {
  right: var(--space-4);
}
.slider__dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: var(--space-4);
  display: flex;
  justify-content: center;
  gap: var(--space-2);
}
.slider__dots button {
  width: 8px;
  height: 8px;
  padding: 0;
  border-radius: 50%;
  border: 0;
  background: var(--border-strong);
  cursor: pointer;
}
.slider__dots button[aria-current='true'] {
  background: var(--accent);
  width: 22px;
  border-radius: var(--radius-pill);
}

/* ---------- Diagram (ERD / API flow) ---------- */
.diagram {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: clamp(var(--space-5), 3vw, var(--space-8));
  backdrop-filter: blur(10px);
  overflow-x: auto;
}
.flow-dash {
  stroke-dasharray: 6 6;
  animation: dash 1.4s linear infinite;
}
@keyframes dash {
  to {
    stroke-dashoffset: -24;
  }
}

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-strong);
  overflow: hidden;
  padding: clamp(var(--space-10), 5vw, var(--space-20));
  background:
    radial-gradient(700px 300px at 15% 0%, rgba(255, 154, 61, 0.2), transparent 70%),
    radial-gradient(600px 320px at 95% 100%, rgba(0, 229, 255, 0.14), transparent 70%),
    var(--surface);
  backdrop-filter: blur(12px);
}
.cta-band h2 {
  max-width: 24ch;
  margin-bottom: var(--space-5);
}
.cta-band p {
  color: var(--text-muted);
  max-width: 54ch;
  margin-bottom: var(--space-8);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: clamp(var(--space-16), 8vw, var(--space-32));
  padding-block: clamp(var(--space-12), 6vw, var(--space-20)) var(--space-8);
  background: color-mix(in srgb, var(--bg-deep) 60%, transparent);
  position: relative;
  z-index: 1;
}
.footer-top {
  display: grid;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
}
@media (min-width: 900px) {
  .footer-top {
    grid-template-columns: 1.4fr 2.6fr;
  }
}
.footer-cols {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}
.footer-cols h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-weight: 500;
  margin-bottom: var(--space-4);
}
.footer-cols ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.footer-cols a {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color 0.2s var(--ease);
}
.footer-cols a:hover {
  color: var(--accent);
}
.footer-brand p {
  color: var(--text-muted);
  font-size: var(--text-sm);
  margin: var(--space-5) 0;
  max-width: 34ch;
}
.newsletter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
  max-width: 340px;
}
.newsletter input {
  min-height: 44px;
}
.socials {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-6);
}
.socials a {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  transition: all 0.2s var(--ease);
}
.socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.socials svg {
  width: 17px;
  height: 17px;
}
.footer-bottom {
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--text-faint);
  font-family: var(--font-mono);
}

/* ---------- Breadcrumbs ---------- */
.crumbs {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
  padding-top: var(--space-8);
  letter-spacing: 0.04em;
}
.crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
}
.crumbs li + li::before {
  content: '/';
  margin-right: var(--space-2);
  color: var(--border-strong);
}
.crumbs a:hover {
  color: var(--accent);
}

/* ---------- Page header ---------- */
.page-head {
  padding-block: clamp(var(--space-10), 5vw, var(--space-20)) clamp(var(--space-8), 4vw, var(--space-12));
}
.page-head h1 {
  max-width: 24ch;
}
.page-head p {
  color: var(--text-muted);
  font-size: var(--text-lg);
  max-width: 60ch;
  margin-top: var(--space-5);
}
.page-head--banner {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  margin-top: var(--space-6);
  padding: clamp(var(--space-10), 6vw, var(--space-24));
  background: var(--bg-deep);
}
.page-head--banner img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}
.page-head--banner > div {
  position: relative;
  max-width: 52ch;
}
[data-theme='light'] .page-head--banner > div {
  color: #f8fafc;
}
[data-theme='light'] .page-head--banner p {
  color: #cbd5e1;
}

/* ---------- Floating widgets ---------- */
.fab-stack {
  position: fixed;
  right: clamp(var(--space-4), 2vw, var(--space-8));
  bottom: clamp(var(--space-4), 2vw, var(--space-8));
  z-index: 80;
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-3);
  align-items: flex-end;
}
.fab {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all 0.25s var(--ease);
}
.fab:hover {
  transform: translateY(-3px) scale(1.04);
  color: var(--accent);
  border-color: var(--accent);
}
.fab svg {
  width: 21px;
  height: 21px;
}
.fab--wa {
  background: #1f8a4c;
  color: #fff;
  border-color: transparent;
}
.fab--wa:hover {
  color: #fff;
}
.fab--bot {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
}
.fab--bot:hover {
  color: var(--accent-ink);
}
.fab--top {
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}
.fab--top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

/* Chatbot */
.chatbot {
  position: fixed;
  right: clamp(var(--space-4), 2vw, var(--space-8));
  bottom: calc(clamp(var(--space-4), 2vw, var(--space-8)) + 68px);
  width: min(360px, calc(100vw - 2rem));
  z-index: 85;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px) scale(0.97);
  pointer-events: none;
  transition: all 0.3s var(--ease);
}
.chatbot.is-open {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.chatbot__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.chatbot__head b {
  font-size: var(--text-sm);
}
.chatbot__head small {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-faint);
  font-family: var(--font-mono);
}
.chatbot__head button {
  margin-left: auto;
  background: none;
  border: 0;
  cursor: pointer;
  color: var(--text-faint);
}
.chatbot__head button svg {
  width: 18px;
  height: 18px;
}
.chatbot__log {
  padding: var(--space-4);
  display: grid;
  gap: var(--space-3);
  max-height: 280px
;
  overflow-y: auto;
  font-size: var(--text-sm);
}
.msg {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  max-width: 88%;
  line-height: 1.55;
}
.msg--bot {
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.msg--me {
  background: var(--accent);
  color: var(--accent-ink);
  margin-left: auto;
  font-weight: 600;
}
.chatbot__quick {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0 var(--space-4) var(--space-4);
}
.chatbot__form {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3);
  border-top: 1px solid var(--border);
}
.chatbot__form input {
  min-height: 40px;
}
.chatbot__form button {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 0;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
  display: grid;
  place-items: center;
}
.chatbot__form button svg {
  width: 17px;
  height: 17px;
}

/* Preloader */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  background: var(--bg);
  gap: var(--space-6);
  transition: opacity 0.5s var(--ease);
}
#preloader.is-done {
  opacity: 0;
  pointer-events: none;
}
.loader-inner {
  display: grid;
  justify-items: center;
  gap: var(--space-5);
}
.loader-inner svg {
  width: 52px;
  height: 52px;
  color: var(--accent);
  animation: float-y 2.4s ease-in-out infinite;
}
.loader-bar {
  width: 168px;
  height: 2px;
  background: var(--surface-2);
  overflow: hidden;
  border-radius: var(--radius-pill);
}
.loader-bar i {
  display: block;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: loader 1.1s ease-in-out infinite;
}
@keyframes loader {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(320%);
  }
}
.loader-inner small {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 1;
}
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transition:
      opacity 0.8s var(--ease),
      filter 0.8s var(--ease);
    filter: blur(6px);
  }
  .reveal.is-in {
    opacity: 1;
    filter: none;
  }
}

/* ---------- Misc content ---------- */
.prose p {
  color: var(--text-muted);
  margin-bottom: var(--space-5);
  max-width: 68ch;
}
.prose h2 {
  margin-block: var(--space-10) var(--space-5);
}
.prose h3 {
  margin-block: var(--space-8) var(--space-4);
}
.prose ul {
  color: var(--text-muted);
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  max-width: 68ch;
}
.kv {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.kv > div {
  background: var(--bg);
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  font-size: var(--text-sm);
}
.kv dt,
.kv span:first-child {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.kv b {
  text-align: right;
}
.logo-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.logo-wall span {
  background: var(--bg);
  padding: var(--space-6) var(--space-4);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: -0.01em;
  color: var(--text-muted);
  transition: color 0.25s var(--ease);
  text-align: center;
}
.logo-wall span:hover {
  color: var(--accent);
}
.map-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  min-height: 300px;
  filter: grayscale(0.3);
}
[data-theme='dark'] .map-frame {
  filter: invert(0.9) hue-rotate(180deg) saturate(0.7) brightness(0.95);
}
.map-frame iframe {
  width: 100%;
  height: 100%;
  min-height: 300px;
  border: 0;
  display: block;
}
.waveform {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 4px;
  height: 56px;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-sizing: content-box;
}
.waveform i {
  flex: 1;
  min-width: 3px;
  background: var(--cyan);
  border-radius: 2px;
  animation: wave 1.1s ease-in-out infinite;
  opacity: 0.85;
}
@keyframes wave {
  0%,
  100% {
    height: 18%;
  }
  50% {
    height: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Start a Project band ---------- */
.btn--lg {
  padding: 1.05rem 2.1rem;
  font-size: var(--text-base);
}
.cta-band--portal {
  background:
    radial-gradient(900px 340px at 12% 0%, rgba(255, 154, 61, 0.16), transparent 70%),
    radial-gradient(700px 300px at 88% 100%, rgba(0, 229, 255, 0.12), transparent 70%),
    var(--surface);
  border: 1px solid var(--border-strong, var(--border));
}
.portal-steps {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: var(--space-8);
  list-style: none;
  padding: 0;
  counter-reset: portal;
}
.portal-steps li {
  counter-increment: portal;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-2, rgba(255, 255, 255, 0.02));
}
.portal-steps li::before {
  content: counter(portal);
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: var(--space-4);
  border-radius: 999px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}
.portal-steps b {
  display: block;
  color: var(--text);
  font-family: var(--font-display);
  margin-bottom: var(--space-2);
}
.portal-steps p {
  margin: 0;
  font-size: var(--text-sm);
}

/* ---------- Announcement bar (admin-managed) ---------- */
.announce-bar {
  position: relative;
  z-index: 40;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(90deg, rgba(255, 154, 61, 0.14), rgba(123, 97, 255, 0.12));
  backdrop-filter: blur(10px);
}
.announce-bar__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0.7rem var(--space-5);
  flex-wrap: wrap;
}
.announce-bar p {
  margin: 0;
  font-size: var(--text-sm);
  flex: 1 1 280px;
}
.announce-bar b {
  color: var(--text);
}
.announce-bar a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  font-size: var(--text-sm);
  font-weight: 500;
}
.announce-bar a svg {
  width: 14px;
  height: 14px;
}
.announce-bar__close {
  background: none;
  border: 0;
  color: var(--text-muted);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 0.25rem;
}
.announce-bar__close:hover {
  color: var(--text);
}

/* Discreet staff entry point in the footer bottom row */
.footer-admin {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.footer-admin:hover,
.footer-admin:focus-visible {
  color: var(--accent);
  border-bottom-color: currentColor;
}

/* ==========================================================================
   Research & Publications — portal, papers, submission, certificates
   Additive only: every rule below is scoped to the research pages.
   ========================================================================== */
.subnav {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-deep) 55%, transparent);
  backdrop-filter: blur(8px);
  margin-top: var(--space-8);
}
.subnav__inner {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}
.subnav__inner::-webkit-scrollbar { display: none; }
.subnav__link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
}
.subnav__link:hover { color: var(--text); border-color: var(--border); }
.subnav__link.is-active {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.filter-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0 0 var(--space-8);
}
.year-select select {
  min-height: 44px;
  padding: var(--space-3) var(--space-4);
}
.research-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
  margin-left: auto;
}

.paper-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}
.paper-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.paper-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.paper-card__top {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  justify-content: space-between;
}
.paper-card__field {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--cyan);
}
.paper-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.25;
}
.paper-card h3 a { color: inherit; }
.paper-card h3 a:hover { color: var(--accent); }
.paper-card__authors { font-size: var(--text-sm); color: var(--text); }
.paper-card__abstract {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.65;
}
.paper-card__ids {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
}
.paper-card__ids div { display: flex; flex-direction: column; gap: 2px; }
.paper-card__ids dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.paper-card__ids dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text);
  word-break: break-all;
}
.paper-card__meta { font-size: var(--text-xs); color: var(--text-faint); }
.paper-card__foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-2);
}
.paper-card .kv { margin: var(--space-2) 0; }
.paper-card--skeleton {
  gap: var(--space-4);
  pointer-events: none;
}
.paper-card--skeleton span {
  display: block;
  height: 12px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--surface-2), var(--surface), var(--surface-2));
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
}
.paper-card--skeleton span:first-child { width: 45%; height: 20px; }
.paper-card--skeleton span:last-child { width: 70%; }
@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .paper-card--skeleton span { animation: none; }
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.28rem 0.65rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
}
.status-pill--published,
.status-pill--approved {
  color: var(--cyan);
  border-color: color-mix(in srgb, var(--cyan) 45%, transparent);
  background: color-mix(in srgb, var(--cyan) 10%, transparent);
}
.status-pill--pending,
.status-pill--under_review {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}
.status-pill--rejected {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.45);
  background: rgba(248, 113, 113, 0.09);
}
.status-pill--sample {
  color: var(--purple);
  border-color: color-mix(in srgb, var(--purple) 45%, transparent);
  background: color-mix(in srgb, var(--purple) 10%, transparent);
}

/* The research workflow uses upper-case status names. */
.status-pill--PUBLISHED,
.status-pill--APPROVED,
.status-pill--ACCEPTED {
  color: var(--cyan);
  border-color: color-mix(in srgb, var(--cyan) 45%, transparent);
  background: color-mix(in srgb, var(--cyan) 10%, transparent);
}
.status-pill--PENDING,
.status-pill--DRAFT,
.status-pill--UNDER_REVIEW {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}
.status-pill--REVISION_REQUIRED {
  color: #f0a92b;
  border-color: rgba(240, 169, 43, 0.45);
  background: rgba(240, 169, 43, 0.1);
}
.status-pill--REJECTED {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.45);
  background: rgba(248, 113, 113, 0.09);
}
.status-pill--UNPUBLISHED {
  color: var(--text-muted);
  border-color: var(--border-strong);
  background: transparent;
}

.year-group { margin-bottom: var(--space-16); }
.year-group__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
}
.year-group__head h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
}
.year-group__head span {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* paper detail */
.paper-detail {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  align-items: start;
}
.paper-detail__h {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: var(--space-8) 0 var(--space-4);
}
.paper-detail__main > .paper-detail__h:first-of-type { margin-top: var(--space-6); }
.paper-detail__side { display: grid; gap: var(--space-6); }
.paper-badges { display: flex; flex-wrap: wrap; gap: var(--space-2); }
@media (max-width: 900px) {
  .paper-detail { grid-template-columns: 1fr; }
}

/* submission form extras */
.field-hint {
  font-size: var(--text-xs);
  color: var(--text-faint);
  margin-top: var(--space-2);
}
.is-invalid {
  border-color: #ef4444 !important;
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.14);
}
.form-status.is-error,
.form-status.is-busy,
.form-status.is-ok { display: flex; }
.form-status.is-error {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.09);
  color: var(--text);
}
.form-status.is-busy {
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--text-muted);
}
.form-status.is-ok {
  border-color: color-mix(in srgb, var(--cyan) 45%, transparent);
  background: color-mix(in srgb, var(--cyan) 10%, transparent);
  color: var(--text);
}
.file-drop.is-over { border-color: var(--accent); color: var(--accent); }
.paper-id-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  letter-spacing: 0.08em;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px dashed color-mix(in srgb, var(--accent) 45%, transparent);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  text-align: center;
  margin: var(--space-5) 0;
  word-break: break-all;
}
.steps-list {
  list-style: none;
  padding: 0;
  margin: var(--space-5) 0 0;
  display: grid;
  gap: var(--space-4);
  counter-reset: step;
}
.steps-list li {
  display: grid;
  gap: 2px;
  padding-left: var(--space-8);
  position: relative;
  counter-increment: step;
}
.steps-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}
.steps-list b { font-size: var(--text-sm); }
.steps-list span { font-size: var(--text-sm); color: var(--text-muted); }

.lookup-panel {
  max-width: 720px;
  margin-bottom: var(--space-12);
}

/* verification */
.verify-wrap {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
}
@media (max-width: 860px) {
  .verify-wrap { grid-template-columns: 1fr; }
}
.verify-form input {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.verify-result {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  background: var(--surface);
  display: grid;
  gap: var(--space-5);
}
.verify-result[data-state='valid'] { border-color: color-mix(in srgb, var(--cyan) 50%, transparent); }
.verify-result[data-state='sample'] { border-color: color-mix(in srgb, var(--purple) 50%, transparent); }
.verify-result[data-state='invalid'] { border-color: rgba(239, 68, 68, 0.5); }
.verify-result[data-state='revoked'] { border-color: rgba(217, 119, 6, 0.55); }
.verify-result__head { display: grid; gap: var(--space-3); }
.verify-result__head p { font-size: var(--text-sm); color: var(--text-muted); }
.verify-stamp {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
}
[data-state='valid'] .verify-stamp {
  color: var(--cyan);
  border-color: color-mix(in srgb, var(--cyan) 50%, transparent);
  background: color-mix(in srgb, var(--cyan) 12%, transparent);
}
[data-state='sample'] .verify-stamp {
  color: var(--purple);
  border-color: color-mix(in srgb, var(--purple) 50%, transparent);
  background: color-mix(in srgb, var(--purple) 12%, transparent);
}
[data-state='invalid'] .verify-stamp {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.5);
  background: rgba(248, 113, 113, 0.1);
}
/* Revoked is a real, recorded state - not the same as "never existed". */
[data-state='revoked'] .verify-stamp {
  color: #f0a92b;
  border-color: rgba(240, 169, 43, 0.55);
  background: rgba(240, 169, 43, 0.12);
}

/* author group on a researcher paper card */
.paper-card__authors {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.paper-card__authors .tag {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35em;
  font-size: var(--text-xs);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
}
.paper-card__authors .tag--primary {
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  color: var(--accent);
}
.paper-card__authors .tag em {
  font-style: normal;
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.75;
}

/* sample certificate */
.sample-warning {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5) var(--space-6);
  border: 1px dashed color-mix(in srgb, var(--purple) 50%, transparent);
  background: color-mix(in srgb, var(--purple) 8%, transparent);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-10);
}
.sample-warning svg { width: 24px; height: 24px; flex: 0 0 auto; color: var(--purple); }
.sample-warning p { font-size: var(--text-sm); color: var(--text-muted); }
.cert-frame { margin: 0; }
.cert-sheet {
  position: relative;
  aspect-ratio: 297 / 210;
  background: #fffdf7;
  color: #13203c;
  border: 14px solid #0d1b38;
  outline: 2px solid #c79a3c;
  outline-offset: -22px;
  border-radius: 4px;
  padding: clamp(var(--space-5), 3.4vw, var(--space-12)) clamp(var(--space-6), 5vw, var(--space-20));
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  container-type: inline-size;
}
.cert-sheet__watermark {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  transform: rotate(-24deg);
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 7cqw, 4.6rem);
  letter-spacing: 0.05em;
  color: rgba(19, 32, 60, 0.07);
  pointer-events: none;
  white-space: nowrap;
}
.cert-sheet__head { display: grid; gap: 4px; justify-items: center; }
.cert-sheet__logo svg { width: clamp(30px, 5cqw, 52px); height: auto; color: #0d1b38; }
.cert-sheet__org {
  font-family: var(--font-display);
  font-size: clamp(0.9rem, 2.3cqw, 1.5rem);
  letter-spacing: 0.16em;
  color: #0d1b38;
}
.cert-sheet__sub {
  font-family: var(--font-mono);
  font-size: clamp(0.5rem, 1.1cqw, 0.72rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #6b7891;
}
.cert-sheet__title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 3.3cqw, 2.1rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #0d1b38;
  margin-top: clamp(var(--space-3), 2cqw, var(--space-6));
}
.cert-sheet__lede {
  font-size: clamp(0.55rem, 1.35cqw, 0.9rem);
  color: #5a6780;
  margin-top: clamp(4px, 1.4cqw, var(--space-4));
}
.cert-sheet__name {
  font-family: var(--font-display);
  font-size: clamp(1rem, 3.6cqw, 2.3rem);
  color: #0d1b38;
  border-bottom: 1px solid #c79a3c;
  padding: 0 clamp(var(--space-4), 3cqw, var(--space-10)) 4px;
  margin-top: 2px;
}
.cert-sheet__paper {
  font-family: var(--font-display);
  font-size: clamp(0.7rem, 2cqw, 1.25rem);
  color: #26365c;
  max-width: 88%;
  margin-top: 2px;
  line-height: 1.3;
}
.cert-sheet__body {
  font-size: clamp(0.52rem, 1.3cqw, 0.88rem);
  color: #5a6780;
  max-width: 82%;
  line-height: 1.6;
  margin-top: clamp(4px, 1.4cqw, var(--space-4));
}
.cert-sheet__foot {
  margin-top: auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: clamp(var(--space-4), 3cqw, var(--space-10));
  align-items: end;
  text-align: left;
  padding-top: clamp(var(--space-4), 2.5cqw, var(--space-8));
}
.cert-sheet__ids {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px clamp(6px, 1.2cqw, var(--space-4));
  margin: 0;
  font-size: clamp(0.45rem, 1.05cqw, 0.72rem);
}
.cert-sheet__ids dt {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8b96ab;
}
.cert-sheet__ids dd { margin: 0; font-family: var(--font-mono); color: #26365c; }
.cert-sheet__sign { text-align: center; display: grid; gap: 2px; justify-items: center; }
.cert-sheet__signature {
  font-family: var(--font-display);
  font-size: clamp(0.7rem, 1.9cqw, 1.2rem);
  color: #0d1b38;
}
.cert-sheet__rule { display: block; width: clamp(80px, 16cqw, 190px); height: 1px; background: #0d1b38; }
.cert-sheet__signrole {
  font-size: clamp(0.45rem, 1.05cqw, 0.72rem);
  color: #26365c;
}
.cert-sheet__signnote {
  font-family: var(--font-mono);
  font-size: clamp(0.4rem, 0.95cqw, 0.62rem);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #8b96ab;
}
.cert-sheet__qr { display: grid; gap: 4px; justify-items: center; }
.cert-sheet__qrbox {
  width: clamp(44px, 9cqw, 104px);
  aspect-ratio: 1;
  border: 1px solid #d8dce6;
  border-radius: 3px;
  display: grid;
  place-items: center;
  background: #fff;
  overflow: hidden;
}
.cert-sheet__qrbox img { width: 100%; height: 100%; object-fit: contain; }
.cert-sheet__qr p {
  font-family: var(--font-mono);
  font-size: clamp(0.4rem, 0.95cqw, 0.62rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8b96ab;
}
@media (max-width: 620px) {
  .cert-sheet { aspect-ratio: auto; }
  .cert-sheet__foot { grid-template-columns: 1fr; gap: var(--space-5); justify-items: center; text-align: center; }
  .cert-sheet__ids { justify-content: center; }
}
@media (max-width: 600px) {
  .paper-grid { grid-template-columns: 1fr; }
  .research-count { margin-left: 0; flex: 1 0 100%; }
}
.submit-success .badge svg { width: 15px; height: 15px; }