:root {
  color-scheme: dark;
  --ink: #0c0906;
  --umber: #241b0f;
  --gild-dark: #6f431a;
  --gild-mid: #b77a25;
  --gild-rich: #d6a245;
  --gild-light: #f3d28b;
  --warm-white: #eeedec;
  --mist: #a5a09c;
  --risk: #a8482f;
  --line: rgba(214, 162, 69, 0.24);
  --panel: rgba(36, 27, 15, 0.58);
  --serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --sans: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
}
* { box-sizing: border-box; }
html { min-width: 20rem; background: var(--ink); }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 78% 8%, rgba(183, 122, 37, 0.13), transparent 28rem),
    linear-gradient(135deg, #0c0906, #100d08 58%, #161006);
  color: var(--warm-white);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
}
a { color: inherit; text-underline-offset: 0.25em; }
button, input, select { font: inherit; }
button, a { touch-action: manipulation; }
button:focus-visible, input:focus-visible, a:focus-visible {
  outline: 0.1875rem solid var(--gild-light);
  outline-offset: 0.1875rem;
}
.skip-link {
  position: fixed; z-index: 100; left: 1rem; top: 1rem;
  transform: translateY(-180%); padding: 0.75rem 1rem;
  background: var(--gild-light); color: var(--ink);
}
.skip-link:focus { transform: none; }
.brand-lockup { display: grid; align-content: center; gap: 0.1rem; min-height: 2.75rem; text-decoration: none; width: fit-content; }
.brand-name { font: 700 1.18rem/1.2 var(--serif); letter-spacing: 0.12em; }
.brand-category { color: var(--gild-light); font: 600 0.68rem/1.4 var(--mono); letter-spacing: 0.15em; }
.coordinate-mark {
  width: 2.5rem; height: 2.5rem; border: 1px solid var(--gild-mid); border-radius: 50%;
  position: relative; margin-bottom: 0.85rem;
}
.coordinate-mark::before, .coordinate-mark::after {
  content: ''; position: absolute; background: var(--gild-mid); opacity: 0.75;
}
.coordinate-mark::before { width: 3.4rem; height: 1px; top: 50%; left: -0.45rem; }
.coordinate-mark::after { width: 1px; height: 3.4rem; top: -0.45rem; left: 50%; }
.eyebrow { margin: 0 0 0.7rem; color: var(--gild-light); font: 600 0.72rem/1.4 var(--mono); letter-spacing: 0.17em; text-transform: uppercase; }
.muted { color: var(--mist); }
.fine-print { font-size: 0.875rem; color: var(--mist); }
.auth-layout { min-height: 100vh; display: grid; }
.auth-brand {
  display: none; position: relative; overflow: hidden; padding: 4rem clamp(2rem, 5vw, 6rem);
  border-right: 1px solid var(--line);
}
.auth-brand::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, transparent 49.8%, rgba(214,162,69,.12) 50%, transparent 50.2%),
    linear-gradient(0deg, transparent 49.8%, rgba(214,162,69,.08) 50%, transparent 50.2%);
  background-size: 8rem 8rem;
  mask-image: linear-gradient(135deg, rgba(0,0,0,.9), transparent 78%);
}
.auth-brand-copy { position: relative; z-index: 1; max-width: 37rem; align-self: end; }
.auth-brand h1 { margin: 0 0 1.25rem; font: 600 clamp(2.8rem, 5vw, 5.8rem)/1.08 var(--serif); letter-spacing: -0.035em; }
.auth-brand p { max-width: 34rem; margin: 0; color: #c8c3bc; font-size: 1.05rem; }
.auth-panel { display: grid; align-content: center; padding: clamp(1.5rem, 6vw, 4.5rem); }
.auth-card { width: min(100%, 30rem); margin-inline: auto; }
.auth-card h2 { margin: 2.4rem 0 0.75rem; font: 600 clamp(2rem, 8vw, 3.4rem)/1.12 var(--serif); letter-spacing: -0.025em; }
.auth-card > p { margin: 0 0 2rem; }
.form-stack { display: grid; gap: 1rem; }
label { display: grid; gap: 0.5rem; color: #d9d5cf; font-weight: 600; }
input, select {
  width: 100%; min-height: 3.25rem; padding: 0.85rem 1rem;
  border: 1px solid rgba(238,237,236,.22); border-radius: 0.2rem;
  background: rgba(255,255,255,.045); color: var(--warm-white);
}
input:hover, select:hover { border-color: rgba(243,210,139,.6); }
input::placeholder { color: #7e7974; }
.copy-row { display: grid; gap: 0.6rem; margin-top: 1rem; }
.copy-row input { font: 500 0.82rem/1.4 var(--mono); }
.metric-row { display: flex; gap: 1.5rem; margin-top: 1rem; color: var(--gild-light); }
.metric-row strong { display: block; font: 700 1.7rem/1 var(--mono); }
.metric-row span { display: block; color: var(--mist); font-size: 0.78rem; }
.suggestion-row { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.suggestion-row .secondary-button { flex: 1 1 4.5rem; }
.support-payment-history { list-style: none; display: grid; gap: 0.5rem; padding: 0; margin: 0.8rem 0 0; }
.support-payment-history li { display: flex; justify-content: space-between; gap: 1rem; padding: 0.65rem 0.75rem; border: 1px solid var(--line); border-radius: 0.65rem; color: var(--mist); }
.checkbox-row { grid-template-columns: 1.25rem minmax(0, 1fr); align-items: center; min-height: 2.75rem; font-weight: 400; }
.checkbox-row input { width: 1.1rem; min-height: 1.1rem; margin: 0; accent-color: var(--gild-rich); }
.otp-input { font: 600 1.45rem/1 var(--mono); letter-spacing: 0.42em; }
.primary-button, .secondary-button {
  min-height: 3.25rem; padding: 0.8rem 1.2rem; border-radius: 0.2rem;
  font-weight: 700; letter-spacing: 0.04em; cursor: pointer;
}
.primary-button { border: 1px solid var(--gild-rich); background: var(--gild-rich); color: var(--ink); }
.primary-button:hover { background: var(--gild-light); border-color: var(--gild-light); }
.secondary-button { border: 1px solid var(--line); background: transparent; color: var(--warm-white); }
.secondary-button:hover { border-color: var(--gild-light); }
button[disabled] { cursor: wait; opacity: 0.58; }
.form-message { min-height: 1.6rem; margin: 0.25rem 0 0; color: var(--mist); }
.form-message[data-tone='error'] { color: #e29a84; }
.form-message[data-tone='success'] { color: var(--gild-light); }
.is-hidden { display: none !important; }
.auth-boundary { margin-top: 2.2rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.portal-header {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between;
  min-height: 4.75rem; padding: 0.75rem 1rem; background: rgba(12,9,6,.93);
  border-bottom: 1px solid var(--line); backdrop-filter: blur(1rem);
}
.menu-button { min-width: 3rem; min-height: 3rem; border: 1px solid var(--line); background: transparent; color: var(--warm-white); }
.portal-grid { display: grid; min-height: calc(100vh - 4.75rem); }
.portal-nav {
  display: none; padding: 1rem; background: #100d09; border-bottom: 1px solid var(--line);
}
.portal-nav.is-open { display: grid; }
.portal-nav a {
  display: flex; align-items: center; min-height: 3rem; padding: 0.55rem 0.75rem;
  border-left: 2px solid transparent; color: #bbb6af; text-decoration: none;
}
.portal-nav a[aria-current='page'] { border-left-color: var(--gild-rich); background: rgba(214,162,69,.08); color: var(--warm-white); }
.nav-kicker { margin: 1.5rem 0 0.5rem; padding-inline: 0.75rem; color: var(--gild-mid); font: 600 0.68rem/1.4 var(--mono); letter-spacing: 0.16em; }
.portal-main { padding: 1.5rem 1rem 4rem; }
.portal-shell { width: min(100%, 78rem); margin-inline: auto; }
.portal-intro { display: grid; gap: 1rem; margin-bottom: 2rem; }
.portal-intro h1 { margin: 0; max-width: 16ch; font: 600 clamp(2.4rem, 9vw, 5rem)/1.05 var(--serif); letter-spacing: -0.04em; }
.status-pill { width: fit-content; padding: 0.45rem 0.7rem; border: 1px solid var(--line); color: var(--gild-light); font: 600 0.72rem/1.2 var(--mono); letter-spacing: 0.08em; }
.status-pill[data-tone='error'] { border-color: rgba(168,72,47,.75); color: #e29a84; }
.dashboard-grid { display: grid; gap: 1rem; }
.panel {
  position: relative; overflow: hidden; min-height: 11rem; padding: 1.25rem;
  border: 1px solid var(--line); background: var(--panel);
}
.panel::after { content: ''; position: absolute; width: 5rem; height: 1px; right: 0; top: 1.4rem; background: var(--gild-mid); opacity: .7; }
.panel h2 { margin: 0 0 0.75rem; font: 600 1.35rem/1.25 var(--serif); }
.panel p { margin: 0; color: #bbb6af; }
.panel-meta { margin-top: 1.6rem; color: var(--gild-light); font: 600 0.75rem/1.4 var(--mono); letter-spacing: 0.08em; }
.panel[data-state='EMPTY'] .panel-meta { color: #c9b27f; }
.panel[data-state='AVAILABLE'] { border-color: rgba(214,162,69,.48); }
.panel[data-state='UNAVAILABLE'] { border-color: rgba(168,72,47,.58); }
.panel[data-state='UNAVAILABLE'] .panel-meta { color: #e29a84; }
.panel[data-state='NOT_CONNECTED'] .panel-meta { color: var(--mist); }
.panel-primary { min-height: 15rem; background: linear-gradient(145deg, rgba(111,67,26,.24), rgba(36,27,15,.45)); }
.panel-list { margin: 1.25rem 0 0; padding: 0; list-style: none; }
.panel-list li { display: flex; justify-content: space-between; gap: 1rem; padding: 0.7rem 0; border-top: 1px solid rgba(238,237,236,.09); color: #c7c2bb; }
.panel-list li > span:first-child { min-width: 0; overflow-wrap: anywhere; }
.panel-list span:last-child { color: var(--mist); font-family: var(--mono); font-size: 0.8rem; }
.roadmap-list { margin: 1.25rem 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 0.6rem; }
.roadmap-list li { padding: 0.8rem; border: 1px solid rgba(238,237,236,.09); background: rgba(255,255,255,.025); }
.roadmap-list strong { display: block; color: var(--gild-light); font-family: var(--mono); }
.roadmap-list span { display: block; color: var(--mist); font-size: 0.82rem; }
.learning-stack, .download-stack { display: grid; gap: 0.9rem; margin-top: 1.25rem; }
.learning-card, .download-card {
  display: grid; gap: 0.85rem; padding: 1rem;
  border: 1px solid rgba(238,237,236,.12); background: rgba(255,255,255,.025);
}
.learning-card-header { display: grid; gap: 0.6rem; }
.learning-card h3, .download-card h3 { margin: 0; font: 600 1.12rem/1.3 var(--serif); }
.learning-card p, .download-card p { margin: 0; }
.learning-progress-label { display: flex; justify-content: space-between; gap: 1rem; color: var(--mist); font-size: 0.875rem; }
.learning-progress-label strong { color: var(--gild-light); font-family: var(--mono); }
.learning-progress { width: 100%; height: 0.7rem; accent-color: var(--gild-rich); }
.lesson-list { display: grid; gap: 0.55rem; margin: 0; padding: 0; list-style: none; }
.lesson-row {
  display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 0.75rem;
  align-items: center; min-height: 3rem; padding: 0.7rem 0; border-top: 1px solid rgba(238,237,236,.09);
}
.lesson-copy { min-width: 0; }
.lesson-copy strong { display: block; overflow-wrap: anywhere; }
.lesson-copy span { color: var(--mist); font-size: 0.875rem; }
.lesson-state { color: var(--gild-light); font: 600 0.72rem/1.4 var(--mono); letter-spacing: 0.05em; }
.empty-state { padding: 1rem; border: 1px dashed var(--line); color: var(--mist); }
.download-card { grid-template-columns: minmax(0,1fr); }
.download-meta { color: var(--mist); font: 500 0.78rem/1.5 var(--mono); }
.download-card .secondary-button { width: 100%; }
.download-card[data-state='issuing'] { opacity: 0.72; }
.preregistration-form { margin-top: 1.25rem; max-width: 35rem; }
.portal-footer { margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--line); color: var(--mist); font-size: 0.875rem; }
@media (min-width: 48rem) {
  .dashboard-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .panel-primary { grid-column: span 2; }
  .portal-main { padding: 2.5rem; }
  .portal-intro { grid-template-columns: 1fr auto; align-items: end; }
  .learning-card-header { grid-template-columns: minmax(0,1fr) minmax(12rem, .55fr); align-items: end; }
  .download-card { grid-template-columns: minmax(0,1fr) auto; align-items: center; }
  .download-card .secondary-button { width: auto; min-width: 10rem; }
}
@media (min-width: 64rem) {
  .auth-layout { grid-template-columns: minmax(0, 1.15fr) minmax(28rem, .85fr); }
  .auth-brand { display: grid; }
  .portal-header .menu-button { display: none; }
  .portal-grid { grid-template-columns: 16rem minmax(0, 1fr); }
  .portal-nav { display: block; min-height: calc(100vh - 4.75rem); padding: 1.5rem 1rem; border-right: 1px solid var(--line); border-bottom: 0; }
  .dashboard-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .panel-primary { grid-column: span 2; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; } }