:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #171a20;
  color: #ece9e2;
  --stone: #1e222a;
  --stone-light: #282e38;
  --gold: #c5a059;
  --teal: #00698f;
  --muted: #a9adb4;
  --line: #3a414c;
  --danger: #e29b8d;
  --success: #a8d5b4;
  --radius: 0.9rem;
  --font-display: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  padding-bottom: 6.25rem;
}

button, a { font: inherit; }
a { color: inherit; }
button { color: inherit; }

.topbar {
  align-items: center;
  background: var(--stone);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 1rem;
  min-height: 4.5rem;
  padding: 0.75rem clamp(1rem, 4vw, 2.5rem);
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand {
  color: var(--gold);
  font-size: 1.08rem;
  font-weight: 750;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.brand span { color: #f0ede7; }
.account { align-items: center; display: flex; gap: 0.85rem; margin-left: auto; }
.user-label { color: var(--muted); font-size: 0.9rem; }

.icon-button, .button {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 0.55rem;
  cursor: pointer;
  display: inline-flex;
  justify-content: center;
  min-height: 2.65rem;
  padding: 0.55rem 0.9rem;
  text-decoration: none;
}
.icon-button { background: transparent; border-color: var(--line); font-size: 1.1rem; width: 2.75rem; }
.button-primary { background: var(--gold); color: #171a20; font-weight: 700; }
.button-muted { background: var(--stone-light); border-color: var(--line); }
.button-small { min-height: 2rem; padding: 0.35rem 0.6rem; }
.button:hover, .icon-button:hover { filter: brightness(1.12); }
.button:focus-visible, .icon-button:focus-visible, a:focus-visible {
  outline: 2px solid #f4d48f;
  outline-offset: 3px;
}
[hidden] { display: none !important; }

.status-banner {
  background: #202832;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  padding: 0.7rem clamp(1rem, 4vw, 2.5rem);
}
.status-banner[data-kind="error"] { color: var(--danger); }
.status-banner[data-kind="success"] { color: #a8d5b4; }

.layout { min-height: calc(100vh - 7rem); }
.drawer {
  background: #1b1f26;
  border-right: 1px solid var(--line);
  bottom: 0;
  left: 0;
  overflow-y: auto;
  padding: 1.25rem 0.85rem 7rem;
  position: fixed;
  top: 4.5rem;
  transform: translateX(-100%);
  visibility: hidden;
  width: min(18rem, 85vw);
  z-index: 4;
}
.drawer[data-open="true"] { transform: translateX(0); visibility: visible; }
.nav-list { display: grid; gap: 0.35rem; list-style: none; margin: 0; padding: 0; }
.nav-link {
  border-radius: 0.45rem;
  color: var(--muted);
  display: block;
  padding: 0.75rem 0.85rem;
  text-decoration: none;
}
.nav-link:hover, .nav-link[aria-current="page"] { background: var(--stone-light); color: #fff; }
.nav-link[aria-disabled="true"] { opacity: 0.48; }

main { min-width: 0; padding: clamp(1.25rem, 4vw, 3rem); }
.welcome-card, .content-card {
  background: var(--stone);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  margin: 1rem auto;
  max-width: 52rem;
  padding: clamp(1.35rem, 4vw, 2.5rem);
}
.welcome-card h1, .page-content h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); margin: 0.3rem 0 1rem; }
.welcome-card p, .content-card p { color: var(--muted); line-height: 1.65; }
.eyebrow { color: var(--gold) !important; font-size: 0.75rem; font-weight: 750; letter-spacing: 0.12em; text-transform: uppercase; }
.page-content { margin: 0 auto; max-width: 65rem; }
.page-content .content-card { margin: 1rem 0; max-width: none; }
.content-card h2 { font-size: 1.15rem; margin-top: 0; }
.content-card ul { color: var(--muted); line-height: 1.8; padding-left: 1.2rem; }

.simulation-bar {
  align-items: center;
  background: #12151a;
  border-top: 1px solid var(--gold);
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  justify-content: center;
  padding: 0.7rem 1rem;
  position: fixed;
  width: 100%;
  z-index: 6;
}
.simulation-copy { display: grid; gap: 0.15rem; }
.simulation-copy strong { color: var(--gold); font-size: 0.83rem; }
.simulation-copy span { color: var(--muted); font-size: 0.72rem; }
.simulation-controls { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.simulation-controls button {
  background: var(--stone-light);
  border: 1px solid var(--line);
  border-radius: 99px;
  cursor: pointer;
  font-size: 0.75rem;
  padding: 0.42rem 0.7rem;
}
.simulation-controls button[aria-pressed="true"] { background: var(--gold); border-color: var(--gold); color: #171a20; }

@media (max-width: 760px) {
  .topbar { gap: 0.65rem; }
  .user-label { display: none; }
  .simulation-bar { justify-content: flex-start; }
  .simulation-copy { flex: 1 1 100%; }
}

h1, h2 { font-family: var(--font-display); }
.lead { color: var(--muted); line-height: 1.65; }
.meta { color: var(--muted); font-size: 0.85rem; }
.pre { white-space: pre-wrap; overflow-wrap: anywhere; }
.card-list { display: grid; gap: 0.5rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.grid .content-card { margin: 0; }
.form-grid { display: grid; gap: 0.6rem; }
.form-grid label { color: var(--muted); font-size: 0.85rem; }
input, select, textarea {
  background: #12151a;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  color: inherit;
  font: inherit;
  max-width: 100%;
  padding: 0.55rem 0.7rem;
}
textarea { width: 100%; }
.button-row, .toolbar { align-items: center; display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.4rem; }
.toggle-group { border: 1px solid var(--line); border-radius: 0.45rem; }
.toggle { align-items: center; display: flex; gap: 0.5rem; }
.form-message[data-kind="error"] { color: var(--danger); }
.form-message[data-kind="success"] { color: var(--success); }
.matrix { border-collapse: collapse; width: 100%; }
.matrix th, .matrix td { border-bottom: 1px solid var(--line); padding: 0.5rem; text-align: left; }
.matrix th { color: var(--gold); font-size: 0.8rem; text-transform: uppercase; }
progress { accent-color: var(--gold); width: 100%; }

@media (prefers-reduced-motion: no-preference) {
  .drawer { transition: transform 200ms ease, visibility 200ms; }
  .nav-link, .button { transition: background-color 140ms ease, filter 140ms ease; }
}