/*  LinearCode gateway — Coco Terminal design system.
    Tokens are lifted verbatim from coco-terminal/src/styles/themes.css so the
    site and the app never drift. Brand indigo is used for CTA + logo only;
    everything else is neutral grey. */

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root,
[data-theme="light"] {
  --logo-accent: #5b61c9;

  --app-bg: #f5f5f7;
  --fg-primary: #1d1d1f;
  --fg-secondary: #86868b;
  --fg-dim: #a1a1a6;

  --sidebar-bg: #e8e8ed;
  --sidebar-fg: #1d1d1f;
  --sidebar-fg-dim: #86868b;
  --sidebar-hover: #d1d1d6;
  --sidebar-active: #d1d1d6;

  --sidebar-btn-bg: var(--logo-accent);
  --sidebar-btn-fg: #ffffff;
  --dashboard-accent: #747be0;
  --dashboard-accent-contrast: #ffffff;
  --dashboard-accent-soft: rgba(116, 123, 224, 0.12);
  --dashboard-accent-border: rgba(116, 123, 224, 0.24);

  --input-bg: #ffffff;
  --input-fg: #1d1d1f;
  --input-border: #d2d2d7;

  --border-subtle: #d2d2d7;

  --glass-bg: rgba(245, 245, 247, 0.86);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --hover-bg: rgba(0, 0, 0, 0.04);

  --window-shadow: 0 32px 90px rgba(0, 0, 0, 0.16);
  --page-glow: radial-gradient(
    ellipse 90% 60% at 50% -10%,
    rgba(116, 123, 224, 0.16),
    transparent 70%
  );

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration-fast: 0.15s;
  --duration-normal: 0.25s;
}

[data-theme="dark"] {
  --logo-accent: #5b61c9;

  --app-bg: #1c1c1e;
  --fg-primary: #e5e5ea;
  --fg-secondary: #8e8e93;
  --fg-dim: #636366;

  --sidebar-bg: #161618;
  --sidebar-fg: #e5e5ea;
  --sidebar-fg-dim: #8e8e93;
  --sidebar-hover: #2c2c2e;
  --sidebar-active: #2c2c2e;

  --sidebar-btn-bg: var(--logo-accent);
  --sidebar-btn-fg: #ffffff;
  --dashboard-accent: #747be0;
  --dashboard-accent-contrast: #ffffff;
  --dashboard-accent-soft: rgba(116, 123, 224, 0.18);
  --dashboard-accent-border: rgba(116, 123, 224, 0.3);

  --input-bg: #222224;
  --input-fg: #e5e5ea;
  --input-border: #38383a;

  --border-subtle: #38383a;

  --glass-bg: rgba(28, 28, 30, 0.86);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  --hover-bg: rgba(255, 255, 255, 0.04);

  --window-shadow: 0 32px 90px rgba(0, 0, 0, 0.55);
  --page-glow: radial-gradient(
    ellipse 90% 60% at 50% -10%,
    rgba(116, 123, 224, 0.2),
    transparent 70%
  );
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --app-bg: #1c1c1e;
    --fg-primary: #e5e5ea;
    --fg-secondary: #8e8e93;
    --fg-dim: #636366;

    --sidebar-bg: #161618;
    --sidebar-fg: #e5e5ea;
    --sidebar-fg-dim: #8e8e93;
    --sidebar-hover: #2c2c2e;
    --sidebar-active: #2c2c2e;

    --dashboard-accent-soft: rgba(116, 123, 224, 0.18);
    --dashboard-accent-border: rgba(116, 123, 224, 0.3);

    --input-bg: #222224;
    --input-fg: #e5e5ea;
    --input-border: #38383a;

    --border-subtle: #38383a;

    --glass-bg: rgba(28, 28, 30, 0.86);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
    --hover-bg: rgba(255, 255, 255, 0.04);

    --window-shadow: 0 32px 90px rgba(0, 0, 0, 0.55);
    --page-glow: radial-gradient(
      ellipse 90% 60% at 50% -10%,
      rgba(116, 123, 224, 0.2),
      transparent 70%
    );
  }
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  /* Column layout so a short page (research) still pins its footer to the
     bottom instead of leaving the page background hanging below it. */
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--app-bg);
  background-image: var(--page-glow);
  background-repeat: no-repeat;
  color: var(--fg-primary);
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.mono {
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas,
    monospace;
  font-variant-ligatures: none;
}

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
}

::selection {
  background: var(--dashboard-accent-soft);
}

/* ───────────────────────── top bar ───────────────────────── */

.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-tile {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  overflow: hidden;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
}

.brand-tile img {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-name {
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 16px;
}

.brand-sub {
  color: var(--fg-dim);
  font-size: 12px;
  margin-left: 2px;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.topnav a {
  padding: 7px 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-secondary);
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-smooth),
    color var(--duration-fast) var(--ease-smooth);
}

.topnav a:hover {
  background: var(--hover-bg);
  color: var(--fg-primary);
}

.theme-toggle {
  margin-left: 6px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  color: var(--fg-secondary);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.theme-toggle:hover {
  color: var(--fg-primary);
}

.theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: block;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: none;
  }
}

/* ───────────────────────── hero ───────────────────────── */

.hero {
  padding: 56px 0 28px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 8px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-secondary);
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #34d399;
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.18);
}

h1 {
  margin: 22px auto 0;
  max-width: 16ch;
  font-size: clamp(38px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 600;
}

h1 .accent {
  background: linear-gradient(120deg, #3b82f6, #7c3aed);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  margin: 20px auto 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.6;
  color: var(--fg-secondary);
}

.hero-cta {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: opacity var(--duration-fast) var(--ease-smooth),
    background var(--duration-fast) var(--ease-smooth);
}

.btn-primary {
  background: var(--dashboard-accent);
  color: var(--dashboard-accent-contrast);
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-ghost {
  background: var(--hover-bg);
  border-color: var(--glass-border);
  color: var(--fg-primary);
}

.btn-ghost:hover {
  background: var(--sidebar-hover);
}

.kbd {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 7px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  font-size: 12px;
  color: var(--fg-secondary);
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
}

/* ───────────────────── app window (the demo) ───────────────────── */

.window {
  position: relative;
  margin: 32px auto 0;
  border-radius: 18px;
  border: 1px solid var(--glass-border);
  background: var(--app-bg);
  box-shadow: var(--window-shadow);
  overflow: hidden;
}

.titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  height: 38px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--sidebar-bg);
}

.lights {
  display: flex;
  gap: 7px;
}

.lights i {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  display: block;
}

.lights i:nth-child(1) {
  background: #ff5f57;
}
.lights i:nth-child(2) {
  background: #febc2e;
}
.lights i:nth-child(3) {
  background: #28c840;
}

.titlebar-title {
  flex: 1;
  text-align: center;
  font-size: 12px;
  color: var(--fg-dim);
  letter-spacing: 0.02em;
}

.app-body {
  display: flex;
  min-height: 470px;
  position: relative;
}

/* sidebar — mirrors coco-terminal's <aside class="w-72"> */

.sidebar {
  width: 264px;
  flex: 0 0 264px;
  border-right: 1px solid var(--glass-border);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
}

.sidebar-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-logo {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  overflow: hidden;
  flex: 0 0 auto;
}

.sidebar-logo img {
  width: 100%;
  height: 100%;
  display: block;
}

.sidebar-head h2 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--sidebar-fg);
}

.sidebar-head p {
  margin: 1px 0 0;
  font-size: 12.5px;
  color: var(--sidebar-fg-dim);
}

.sidebar-nav {
  flex: 1;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow: hidden;
}

.new-chat {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  border: 0;
  border-radius: 14px;
  background: var(--sidebar-btn-bg);
  color: var(--sidebar-btn-fg);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: default;
}

.sidebar-section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 8px;
  font-size: 12.5px;
  color: var(--sidebar-fg-dim);
}

.sidebar-section-label .count {
  margin-left: auto;
  font-size: 11px;
}

.rail-label {
  padding: 2px 8px;
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--sidebar-fg-dim);
}

.sidebar-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.sidebar-group.bordered {
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

.rail-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 14px;
  border-radius: 14px;
  font-size: 14px;
  color: var(--sidebar-fg);
  background: transparent;
  border: 0;
  width: 100%;
  text-align: left;
  font-family: inherit;
  cursor: default;
  transition: background var(--duration-fast) var(--ease-smooth);
}

.rail-item .badge {
  margin-left: auto;
  font-size: 11px;
  color: var(--sidebar-fg-dim);
  font-variant-numeric: tabular-nums;
}

.rail-item.is-active {
  background: var(--sidebar-active);
}

.rail-item.is-dim {
  color: var(--sidebar-fg-dim);
}

.thread {
  padding: 9px 12px;
  border-radius: 14px;
  border: 1px solid transparent;
}

.thread .t {
  font-size: 13px;
  font-weight: 500;
  color: var(--sidebar-fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.thread .m {
  margin-top: 2px;
  font-size: 11px;
  color: var(--sidebar-fg-dim);
}

/* main pane */

.pane {
  flex: 1;
  min-width: 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pane-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.pane-head h3 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--fg-secondary);
}

.pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #34d399;
}

.pane-head p {
  margin: 6px 0 0;
  font-size: 13.5px;
  color: var(--fg-secondary);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  border-radius: 16px;
  padding: 13px 14px;
}

.stat .k {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
}

.stat .v {
  margin-top: 4px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.stat .s {
  font-size: 11.5px;
  color: var(--fg-secondary);
}

.index-strip {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  font-size: 12.5px;
  color: var(--fg-secondary);
}

.index-strip .live {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #38bdf8;
  flex: 0 0 auto;
  animation: pulse 2s var(--ease-smooth) infinite;
}

.index-strip b {
  color: var(--fg-primary);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.hint-row {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--fg-dim);
}

/* ───────────────── omnibar (⌘K) — mirrors SearchModal.css ───────────────── */

.omni-backdrop {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 62px 16px 16px;
  z-index: 20;
  background: rgba(0, 0, 0, 0.14);
}

.omni {
  width: min(600px, 100%);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow: var(--glass-shadow);
}

.omni-input-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px 13px;
  border-bottom: 1px solid var(--glass-border);
}

.omni-input-row svg {
  color: var(--fg-secondary);
  flex: 0 0 auto;
}

.omni-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  color: var(--fg-primary);
  font-family: inherit;
  font-size: 18px;
  outline: none;
}

.omni-input::placeholder {
  color: var(--fg-dim);
}

.caret {
  width: 1.5px;
  height: 21px;
  background: var(--dashboard-accent);
  animation: blink 1.1s steps(1) infinite;
}

.caret.hidden {
  display: none;
}

@keyframes blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

.omni-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 18px;
  font-size: 11.5px;
  color: var(--fg-secondary);
  border-bottom: 1px solid var(--glass-border);
}

.omni-results {
  padding: 7px;
  overflow-y: auto;
  min-height: 232px;
  max-height: 288px;
  scrollbar-width: thin;
}

.omni-section {
  padding: 9px 12px 5px;
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--fg-dim);
}

.res {
  display: flex;
  align-items: center;
  gap: 13px;
  width: 100%;
  padding: 11px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--fg-primary);
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-smooth),
    border-color var(--duration-fast) var(--ease-smooth),
    transform var(--duration-fast) var(--ease-smooth);
}

.res:hover {
  background: var(--hover-bg);
}

.res.is-active {
  background: var(--hover-bg);
  border-color: var(--sidebar-btn-bg);
  transform: translateY(-1px);
  box-shadow: inset 0 0 0 1px rgba(91, 97, 201, 0.36),
    0 10px 24px rgba(0, 0, 0, 0.14);
}

.res-icon {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  color: var(--fg-secondary);
}

.res-body {
  flex: 1;
  min-width: 0;
}

.res-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.res-title {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.res-badge {
  flex: 0 0 auto;
  padding: 1px 7px;
  border-radius: 999px;
  border: 1px solid var(--dashboard-accent-border);
  background: var(--dashboard-accent-soft);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg-secondary);
  text-transform: uppercase;
}

.res-sub,
.res-snippet {
  margin-top: 2px;
  font-size: 12px;
  color: var(--fg-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.res mark {
  background: var(--dashboard-accent-soft);
  color: var(--fg-primary);
  border-radius: 3px;
  padding: 0 2px;
}

.res-meta {
  flex: 0 0 auto;
  text-align: right;
  font-size: 11px;
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
}

.omni-empty {
  padding: 44px 20px;
  text-align: center;
  font-size: 13px;
  color: var(--fg-dim);
}

.takeover-hint {
  position: absolute;
  left: 50%;
  bottom: 74px;
  transform: translateX(-50%);
  z-index: 30;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  font-size: 11.5px;
  color: var(--fg-secondary);
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-smooth);
}

.takeover-hint.gone {
  opacity: 0;
}

/* ───────────────────────── pillars ───────────────────────── */

section {
  padding: 52px 0;
}

.section-head {
  max-width: 60ch;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.section-head p {
  margin: 12px 0 0;
  color: var(--fg-secondary);
  font-size: 16px;
}

.pillars {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  border-radius: 20px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--dashboard-accent-border);
  background: var(--dashboard-accent-soft);
  color: var(--dashboard-accent);
}

.card h3 {
  margin: 4px 0 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-secondary);
}

.card ul {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  color: var(--fg-secondary);
}

.card li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: var(--dashboard-accent);
}

/* proof strip */

.proof {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 24px;
  border-radius: 20px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
}

.proof-item .v {
  font-size: 25px;
  font-weight: 600;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.proof-item .k {
  margin-top: 2px;
  font-size: 12.5px;
  color: var(--fg-secondary);
  line-height: 1.45;
}

.footnote {
  margin-top: 14px;
  font-size: 11.5px;
  color: var(--fg-dim);
}

/* ───────────────────────── contact ───────────────────────── */

.contact {
  padding: 30px 32px;
  border-radius: 22px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
}

.contact-email {
  display: inline-block;
  margin-top: 22px;
  font-size: clamp(20px, 2.6vw, 28px);
  letter-spacing: -0.01em;
  color: var(--fg-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--dashboard-accent-border);
  padding-bottom: 3px;
  transition: border-color var(--duration-fast) var(--ease-smooth);
}

.contact-email:hover {
  border-bottom-color: var(--dashboard-accent);
}

/* ───────────────────────── footer ───────────────────────── */

footer {
  /* auto margin (not a grown <main>) pins the footer to the viewport bottom on
     a short page without inflating the content column above it. */
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  padding: 26px 0 40px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 13px;
  color: var(--fg-dim);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: var(--fg-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--fg-primary);
}

/* ───────────────────────── research page ───────────────────────── */

.paper-list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.paper {
  display: flex;
  gap: 18px;
  align-items: baseline;
  padding: 18px 20px;
  border-radius: 18px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease-smooth),
    transform var(--duration-fast) var(--ease-smooth);
}

.paper:hover {
  border-color: var(--dashboard-accent-border);
  transform: translateY(-1px);
}

.paper .date {
  flex: 0 0 96px;
  font-size: 12px;
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
}

.paper h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.paper p {
  margin: 5px 0 0;
  font-size: 13.5px;
  color: var(--fg-secondary);
}

.tagrow {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 1px 8px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* ───────────────────────── article ───────────────────────── */

.article {
  max-width: 72ch;
}

.article-head {
  padding-bottom: 26px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--fg-secondary);
  text-decoration: none;
}

.article-back:hover {
  color: var(--fg-primary);
}

.article-head h1 {
  margin: 18px 0 0;
  max-width: none;
  font-size: clamp(28px, 3.8vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.article-deck {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg-secondary);
}

.article-meta {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--fg-dim);
}

.article-meta .sep {
  opacity: 0.5;
}

.prose {
  font-size: 16px;
  line-height: 1.72;
  color: var(--fg-primary);
}

.prose > p {
  margin: 0 0 18px;
  color: var(--fg-secondary);
}

.prose h2 {
  margin: 42px 0 14px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 600;
  scroll-margin-top: 80px;
}

.prose h3 {
  margin: 30px 0 10px;
  font-size: 17px;
  letter-spacing: -0.01em;
  font-weight: 600;
  scroll-margin-top: 80px;
}

.prose ul,
.prose ol {
  margin: 0 0 18px;
  padding-left: 22px;
  color: var(--fg-secondary);
}

.prose li {
  margin-bottom: 7px;
}

.prose li > ul {
  margin: 7px 0 0;
}

.prose strong {
  color: var(--fg-primary);
  font-weight: 600;
}

.prose a {
  color: var(--fg-primary);
  text-decoration: underline;
  text-decoration-color: var(--dashboard-accent-border);
  text-underline-offset: 3px;
}

.prose a:hover {
  text-decoration-color: var(--dashboard-accent);
}

.prose blockquote {
  margin: 0 0 20px;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--dashboard-accent-border);
  color: var(--fg-secondary);
}

.prose blockquote > p:last-child {
  margin-bottom: 0;
}

.prose pre {
  margin: 0 0 20px;
  padding: 16px 18px;
  overflow-x: auto;
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
}

.prose pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fg-primary);
}

.prose code {
  padding: 1px 5px;
  border-radius: 6px;
  border: 1px solid var(--glass-border);
  background: var(--hover-bg);
  font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}

.prose hr {
  margin: 32px 0;
  border: 0;
  border-top: 1px solid var(--border-subtle);
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: 14px;
  margin: 0 0 20px;
}

.table-wrap {
  margin: 0 0 22px;
  overflow-x: auto;
  border: 1px solid var(--glass-border);
  border-radius: 14px;
}

.prose table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 14px;
}

.prose th,
.prose td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--glass-border);
}

.prose th {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
  background: var(--hover-bg);
  white-space: nowrap;
}

.prose td {
  color: var(--fg-secondary);
}

.prose tbody tr:last-child td {
  border-bottom: 0;
}

.refs {
  margin-top: 42px;
  padding-top: 26px;
  border-top: 1px solid var(--border-subtle);
}

.refs h2 {
  margin-top: 0;
}

.refs ul {
  list-style: none;
  padding-left: 0;
}

.refs li {
  margin-bottom: 10px;
  font-size: 14px;
}

.article-license {
  margin-top: 38px;
  font-size: 12px;
  color: var(--fg-dim);
}

/* ───────────────────────── responsive ───────────────────────── */

@media (max-width: 940px) {
  .pillars,
  .proof {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 780px) {
  .shell {
    padding: 0 16px;
  }
  .brand {
    gap: 9px;
  }
  .brand-sub,
  .hide-sm {
    display: none;
  }
  .topnav {
    gap: 0;
  }
  .topnav a {
    padding: 7px 9px;
    font-size: 13.5px;
  }
  .theme-toggle {
    margin-left: 2px;
    width: 30px;
    height: 30px;
  }
  .sidebar {
    display: none;
  }
  .app-body {
    min-height: 430px;
  }
  .omni-backdrop {
    padding: 18px 10px 10px;
  }
  .hero {
    padding: 48px 0 28px;
  }
}

@media (max-width: 430px) {
  .shell {
    padding: 0 14px;
  }
  .topnav a {
    padding: 7px 6px;
    font-size: 13px;
  }
}

@media (max-width: 560px) {
  .pillars,
  .proof {
    grid-template-columns: 1fr;
  }
  .paper {
    flex-direction: column;
    gap: 6px;
  }
  .res-meta {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}