:root {
  color-scheme: light;
  --bg: #f3efe6;
  --surface: #fbf9f3;
  --surface-raised: #ffffff;
  --ink: #16243f;
  --ink-soft: #22314e;
  --accent: #1e3a5f;
  --muted: #68728a;
  --line: rgba(22, 36, 63, 0.12);
  --line-strong: rgba(22, 36, 63, 0.24);
  --gold: #a8853f;
  --gold-soft: rgba(168, 133, 63, 0.12);
  --on-navy: #f7f4ec;
  --danger: #9a4a3f;
  --shadow: 0 1px 2px rgba(22, 36, 63, 0.06), 0 20px 55px -32px rgba(22, 36, 63, 0.28);
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(168, 133, 63, 0.1), transparent 70%),
    var(--bg);
  line-height: 1.55;
}

[hidden] { display: none !important; }

.site-header {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.brand::after {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 6px;
  content: "";
  border-radius: 50%;
  background: var(--gold);
  vertical-align: middle;
}

.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.tab {
  padding: 7px 16px;
  color: var(--muted);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 160ms ease, color 160ms ease;
}

.tab:hover { color: var(--ink); }

.tab[aria-current="true"] {
  color: var(--on-navy);
  background: var(--ink);
}

main {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 38px 0 96px;
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.1rem, 5.5vw, 3.3rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.12;
}

.intro {
  max-width: 600px;
  margin: 0;
  padding-top: 10px;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.65;
}

.view { padding-top: 40px; }

.view .card { margin-top: 30px; }

.card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface-raised);
  box-shadow: var(--shadow);
}

.toolbar {
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.crumbs {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.93rem;
}

.crumb {
  padding: 0;
  color: var(--accent);
  border: 0;
  background: none;
  font: inherit;
  cursor: pointer;
}

.crumb:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.crumb.current {
  color: var(--ink);
  font-weight: 650;
  cursor: default;
}

.crumb.current:hover { text-decoration: none; }

.crumbs .sep { color: var(--muted); }

.count { color: var(--muted); font-size: 0.88rem; }

.files { display: grid; }

.file {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(22, 36, 63, 0.08);
  transition: background 160ms ease;
}

.file:last-child { border-bottom: 0; }
.file:hover { background: var(--gold-soft); }

.name {
  overflow: hidden;
  color: var(--ink);
  font-size: 0.97rem;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.meta {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.85rem;
}

.actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.btn {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  padding: 9px 16px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.btn.primary {
  color: var(--on-navy);
  border: 1px solid var(--ink);
  background: var(--ink);
}

.btn.primary:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.btn.secondary {
  color: var(--ink);
  border: 1px solid var(--line-strong);
  background: transparent;
}

.btn.secondary:hover {
  border-color: var(--gold);
  background: var(--gold-soft);
}

.btn:disabled {
  cursor: default;
  opacity: 0.55;
  transform: none;
}

.empty, .error {
  padding: 46px 20px;
  color: var(--muted);
  text-align: center;
  font-size: 0.95rem;
}

.error { color: var(--danger); }

.request-form {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.request-form input {
  min-width: 0;
  padding: 11px 14px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--surface);
  font: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: background 160ms ease, border-color 160ms ease;
}

.request-form input:focus {
  border-color: var(--gold);
  background: var(--surface-raised);
}

.request-error {
  padding: 10px 20px;
  color: var(--danger);
  border-bottom: 1px solid rgba(154, 74, 63, 0.18);
  background: rgba(154, 74, 63, 0.06);
  font-size: 0.85rem;
}

.wall {
  display: flex;
  gap: 12px;
  overflow-y: auto;
  flex-direction: column;
  padding: 20px;
  max-height: min(560px, 62vh);
}

.msg {
  width: fit-content;
  max-width: min(86%, 640px);
  padding: 11px 15px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  animation: msg-in 180ms ease;
}

.msg .meta {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 4px;
}

.msg .who {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 700;
}

.msg .when {
  color: var(--muted);
  font-size: 0.78rem;
}

.msg .text {
  overflow-wrap: anywhere;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.msg.self {
  align-self: flex-end;
  border-color: var(--ink);
  background: var(--ink);
}

.msg.self .who { color: #d9c08a; }

.msg.self .when { color: rgba(247, 244, 236, 0.55); }

.msg.self .text { color: var(--on-navy); }

@keyframes msg-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }

  .tabs { display: grid; grid-template-columns: 1fr 1fr; }
  .tab { text-align: center; }

  main { padding: 26px 0 80px; }
  .view { padding-top: 30px; }

  .file { grid-template-columns: 1fr; }
  .actions { justify-content: flex-start; }

  .request-form { grid-template-columns: 1fr; }
  .wall { max-height: none; }
  .msg { max-width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .file, .tab, .btn, .msg {
    transition: none;
    animation: none;
  }
}