/* ===================================================================
   TPG娱乐 — /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   =================================================================== */

/* ---------- 01. Tokens ---------- */
:root {
  --ink-950: #060E19;
  --ink-900: #08121F;
  --ink-800: #0D1B2C;
  --ink-700: #14283D;

  --fog-100: #E8EEF4;
  --rock-300: #A7B6C4;

  --cyan-400: #35E0D4;
  --cyan-600: #0E9F9A;

  --amber-400: #F3B65E;
  --amber-600: #C97E2C;

  --clay-500: #B46A4A;
  --moss-500: #5C7A63;
  --cream-050: #F6F2E8;

  --header-h: 72px;
  --shell: 1280px;
  --gut: clamp(18px, 4vw, 48px);

  --radius-lg: 32px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  --line-soft: rgba(167, 182, 196, 0.16);
  --line-mid: rgba(167, 182, 196, 0.22);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 200ms;

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 02. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 20px);
}

h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote { margin: 0; }

ul, ol { list-style: none; padding: 0; }

img, svg, video, picture { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; text-decoration: none; }

[hidden] { display: none !important; }

/* ---------- 03. Base / 中文排版 ---------- */
body {
  background-color: var(--ink-900);
  color: var(--fog-100);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

@media (min-width: 1200px) {
  body { font-size: 18px; }
}

p { max-width: 68ch; }

::selection {
  background: var(--cyan-400);
  color: var(--ink-950);
}

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 4px;
}

.mono,
code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.86em;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--line-mid), transparent 78%);
}

/* ---------- 04. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 400;
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--cyan-400);
  color: var(--ink-950);
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--fog-100);
  outline-offset: 2px;
}

/* ---------- 05. Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(6, 14, 25, 0.78) 0%, rgba(6, 14, 25, 0.24) 62%, rgba(6, 14, 25, 0) 100%);
  border-bottom: 1px solid transparent;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    backdrop-filter var(--dur) var(--ease);
}

.site-header[data-scrolled="true"] {
  background: rgba(8, 18, 31, 0.95);
  border-bottom-color: var(--line-soft);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
}

.header-grid {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gut);
  height: var(--header-h);
}

/* --- 品牌 --- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 14px;
  border: 1px solid rgba(53, 224, 212, 0.45);
  background: linear-gradient(145deg, var(--ink-700), var(--ink-800));
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  border-color: var(--cyan-400);
  transform: translateY(-2px);
}

.brand-text {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--fog-100);
  white-space: nowrap;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.4;
  letter-spacing: 0.16em;
  color: var(--rock-300);
  white-space: nowrap;
}

/* --- 移动开关 --- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 8px 14px;
  border: 1px solid rgba(167, 182, 196, 0.32);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--fog-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-header[data-open] .nav-toggle-bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- 主导航（桌面） --- */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 38px);
  margin-left: auto;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 26px);
}

.nav-item { min-width: 0; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 2px;
  color: var(--rock-300);
  font-size: 14.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  opacity: 0.62;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--fog-100);
}

.nav-link:hover .nav-index,
.nav-link:focus-visible .nav-index {
  opacity: 1;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--fog-100);
  font-weight: 600;
}

.nav-link[aria-current="page"] .nav-index {
  opacity: 1;
  color: var(--cyan-400);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--cyan-400);
}

/* --- 头行动区 --- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* ---------- 06. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--ghost {
  color: var(--fog-100);
  background: rgba(232, 238, 244, 0.04);
  border-color: rgba(232, 238, 244, 0.28);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
  background: rgba(53, 224, 212, 0.08);
}

.btn--accent {
  color: var(--ink-950);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.btn--accent:hover,
.btn--accent:focus-visible {
  background: #57EFE4;
  border-color: #57EFE4;
}

.btn--accent:active {
  background: var(--cyan-600);
  border-color: var(--cyan-600);
  color: var(--fog-100);
}

/* ---------- 07. Progress rail ---------- */
.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  pointer-events: none;
}

.header-progress::after {
  content: "";
  display: block;
  height: 100%;
  width: var(--progress, 0%);
  background: linear-gradient(90deg, var(--cyan-400), var(--amber-400));
  transition: width 120ms linear;
}

/* ---------- 08. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  background: var(--ink-950);
  border-top: 1px solid var(--line-soft);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 260px;
  background:
    radial-gradient(120% 100% at 10% -40%, rgba(53, 224, 212, 0.16), transparent 62%),
    radial-gradient(90% 100% at 92% -50%, rgba(243, 182, 94, 0.10), transparent 60%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(53, 224, 212, 0.5) 0 12px, transparent 12px 26px);
  opacity: 0.45;
  pointer-events: none;
}

.footer-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(44px, 7vw, 88px) var(--gut) 0;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
}

.footer-brand { max-width: 34ch; }

.footer-brand-name {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--fog-100);
}

.footer-brand-tag {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.footer-brand-desc {
  margin-top: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--rock-300);
}

.footer-cta { margin-top: 22px; }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(24px, 3.5vw, 40px);
}

.footer-col-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--fog-100);
}

.footer-col-index {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  opacity: 0.85;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-link {
  display: inline-block;
  font-size: 14.5px;
  color: var(--rock-300);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--cyan-400);
  transform: translateX(3px);
}

/* --- 联系牌 --- */
.footer-contact {
  display: grid;
  gap: 16px;
  margin-top: clamp(32px, 5vw, 60px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background:
    linear-gradient(160deg, rgba(20, 40, 61, 0.72), rgba(13, 27, 44, 0.5));
}

.footer-contact-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--fog-100);
}

.contact-list {
  display: grid;
  gap: 10px;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(167, 182, 196, 0.14);
}

.contact-row:last-child { border-bottom: 0; }

.contact-label {
  flex: 0 0 auto;
  min-width: 42px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--rock-300);
}

.contact-value {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--fog-100);
  word-break: break-word;
}

.contact-value--wide { flex-basis: 16ch; }

.copy-btn {
  flex: 0 0 auto;
  padding: 5px 12px;
  border: 1px solid rgba(53, 224, 212, 0.4);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.copy-btn:hover,
.copy-btn:focus-visible {
  background: rgba(53, 224, 212, 0.14);
  border-color: var(--cyan-400);
}

.copy-btn[data-copied] {
  background: var(--amber-400);
  border-color: var(--amber-400);
  color: var(--ink-950);
}

.footer-note {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--rock-300);
  max-width: 62ch;
}

/* --- 底栏 --- */
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(28px, 4vw, 48px);
  padding: 20px 0 28px;
  border-top: 1px solid var(--line-soft);
}

.footer-legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--rock-300);
}

.footer-meta {
  font-size: 12.5px;
  color: var(--rock-300);
}

/* ---------- 09. Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.site-main {
  display: block;
  padding-top: var(--header-h);
}

.site-main--flush { padding-top: 0; }

.section {
  padding-block: clamp(48px, 8vw, 112px);
}

.section--tight { padding-block: clamp(32px, 5vw, 64px); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.stack { display: grid; gap: clamp(12px, 1.6vw, 20px); }

/* ---------- 10. Small components ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-mid);
  background: rgba(13, 27, 44, 0.6);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--rock-300);
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  background: rgba(180, 106, 74, 0.16);
  border: 1px solid rgba(180, 106, 74, 0.5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #E0A887;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--rock-300);
}

.breadcrumb a {
  color: var(--cyan-400);
  transition: color var(--dur) var(--ease);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--fog-100);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumb span[aria-hidden] { color: rgba(167, 182, 196, 0.45); }

/* ---------- 11. Prose panel ---------- */
.prose {
  max-width: 72ch;
  padding: clamp(22px, 4vw, 52px);
  border-radius: var(--radius-lg);
  background: var(--cream-050);
  color: #132131;
  font-size: 16.5px;
  line-height: 1.85;
}

.prose > * + * { margin-top: 1em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  color: #0A1725;
  letter-spacing: 0.01em;
}

.prose h2 { font-size: clamp(22px, 2.6vw, 30px); }
.prose h3 { font-size: clamp(18px, 2vw, 22px); }

.prose a {
  color: #0B6E6B;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose ul,
.prose ol {
  padding-left: 1.25em;
  list-style: disc;
}

.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }

/* ---------- 12. Media placeholders ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-image: linear-gradient(140deg, var(--ink-800), var(--ink-700) 58%, #10202F);
  isolation: isolate;
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(53, 224, 212, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 224, 212, 0.10) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.65;
}

.media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 52%;
  background: linear-gradient(180deg, transparent, rgba(6, 14, 25, 0.62));
}

.media > img,
.media > picture > img,
.media > video {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media--slice {
  clip-path: polygon(0 0, 100% 0, 100% 86%, 86% 100%, 0 100%);
}

.media-frame {
  position: relative;
  padding: 10px;
  border: 1px solid var(--line-soft);
  border-radius: calc(var(--radius-md) + 10px);
  background: rgba(13, 27, 44, 0.5);
}

.media-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--rock-300);
}

/* ---------- 13. Responsive ---------- */
@media (min-width: 900px) {
  .footer-top {
    grid-template-columns: minmax(240px, 1fr) minmax(0, 2.1fr);
    align-items: start;
  }

  .footer-cols { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 1023px) {
  :root { --header-h: 64px; }

  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    z-index: 110;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: clamp(20px, 5vw, 36px);
    margin-left: 0;
    padding: clamp(20px, 6vw, 44px) var(--gut) 48px;
    background: var(--ink-950);
    border-top: 1px solid var(--line-soft);
    overflow-y: auto;
    overscroll-behavior: contain;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition:
      opacity var(--dur) var(--ease),
      transform var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }

  .site-header[data-open] .primary-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item + .nav-item { border-top: 1px solid rgba(167, 182, 196, 0.14); }

  .nav-link {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 16px 0;
    font-family: var(--font-display);
    font-size: 21px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--fog-100);
  }

  .nav-index { order: 2; font-size: 12px; opacity: 0.8; }

  .nav-link::after { display: none; }

  .header-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-top: auto;
    padding-top: 8px;
    border-top: 1px solid var(--line-soft);
  }

  .header-actions .btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 15px;
  }
}

@media (max-width: 900px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-9,
  .col-12 { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .brand-tag { display: none; }

  .brand-mark { width: 36px; height: 36px; border-radius: 12px; font-size: 12px; }

  .brand-name { font-size: 17px; }

  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 18px; }

  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .contact-row { gap: 6px 12px; }

  .copy-btn { margin-left: auto; }

  .prose { border-radius: var(--radius-md); }
}

@media (max-width: 380px) {
  body { font-size: 16px; }

  .footer-cols { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 14. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .btn:hover,
  .brand:hover .brand-mark,
  .footer-link:hover,
  .footer-link:focus-visible { transform: none; }

  .header-progress::after { transition: none; }
}