:root {
  color-scheme: light;

  /* Paper + ink. Neutrals tinted toward the accent hue so the page reads cool, not gray. */
  --bg:            oklch(0.985 0.003 255);
  --surface:       oklch(1 0 0);
  --surface-soft:  oklch(0.975 0.006 255);
  --surface-sunk:  oklch(0.96 0.008 255);

  --border:        oklch(0.92 0.012 255);
  --border-strong: oklch(0.86 0.014 255);

  --text:          oklch(0.24 0.02 255);
  --text-2:        oklch(0.4 0.018 255);
  --muted:         oklch(0.48 0.015 255);

  --accent:        oklch(0.5 0.15 255);
  --accent-hover:  oklch(0.44 0.16 255);
  --accent-press:  oklch(0.38 0.16 255);
  --accent-soft:   oklch(0.96 0.03 255);
  --accent-ring:   oklch(0.5 0.15 255 / 0.35);

  --danger:        oklch(0.5 0.18 25);
  --danger-soft:   oklch(0.97 0.025 25);
  --ok:            oklch(0.5 0.13 155);
  --ok-soft:       oklch(0.97 0.03 155);

  --shadow-xs: 0 1px 1px oklch(0.3 0.06 255 / 0.04);
  --shadow-sm: 0 1px 2px oklch(0.3 0.06 255 / 0.06), 0 1px 1px oklch(0.3 0.06 255 / 0.03);
  --shadow-md: 0 4px 12px oklch(0.3 0.06 255 / 0.06), 0 1px 2px oklch(0.3 0.06 255 / 0.04);

  --radius:    10px;
  --radius-sm: 6px;
  --radius-lg: 14px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI Variable", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15.5px/1.55 var(--font-sans);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Universal focus ring — visible, accessible, on-brand. */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 150ms ease;
}
a:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Header ---------- */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 5;
  backdrop-filter: saturate(1.2);
}
.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.brand:hover { text-decoration: none; color: var(--text); }
.brand .dot { color: var(--accent); }

nav {
  display: flex;
  gap: 18px;
  align-items: center;
  font-size: 14px;
  color: var(--text-2);
}
nav a { color: var(--text-2); font-weight: 500; }
nav a:hover { color: var(--accent); text-decoration: none; }
nav .handle {
  color: var(--text);
  font-weight: 600;
  padding: 4px 10px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
}
nav .badge {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-press);
  border: 1px solid oklch(0.9 0.04 255);
}

/* ---------- Layout ---------- */

main {
  max-width: 780px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text);
  margin: 0 0 14px;
}
h3 { font-size: 15px; font-weight: 600; margin: 0 0 6px; color: var(--text); }

/* ---------- Cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-xs);
}
.card h3 { margin: 0 0 6px; font-size: 15px; }
.card .meta {
  color: var(--muted);
  font-size: 12.5px;
  letter-spacing: 0.005em;
}

/* ---------- Form controls ---------- */

button, input, textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  transition: border-color 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
}
input, textarea {
  width: 100%;
  background: var(--surface);
}
input::placeholder, textarea::placeholder { color: var(--muted); }
input:hover, textarea:hover { border-color: oklch(0.78 0.02 255); }
input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}
textarea { min-height: 120px; resize: vertical; line-height: 1.55; }

button {
  cursor: pointer;
  background: var(--accent);
  color: oklch(1 0 0);
  border-color: transparent;
  font-weight: 600;
  padding: 10px 16px;
  box-shadow: var(--shadow-sm);
}
button:hover { background: var(--accent-hover); }
button:active { background: var(--accent-press); transform: translateY(0.5px); }
button:disabled { opacity: 0.55; cursor: not-allowed; box-shadow: none; }

button.secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  font-weight: 500;
  box-shadow: none;
}
button.secondary:hover { background: var(--surface-soft); border-color: oklch(0.75 0.02 255); }

button.danger {
  background: var(--danger);
  color: oklch(1 0 0);
}
button.danger:hover { background: oklch(0.44 0.19 25); }

label {
  display: block;
  margin: 12px 0 5px;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
}

.row { display: flex; gap: 10px; align-items: center; }
.row > * { flex: 1; }
.row.tight > * { flex: initial; }

/* ---------- Status text ---------- */

.error {
  color: oklch(0.45 0.19 25);
  font-size: 13px;
  margin-top: 10px;
}
.ok {
  color: oklch(0.44 0.14 155);
  font-size: 13px;
  margin-top: 10px;
}
.muted { color: var(--muted); }

/* ---------- Threads list ---------- */

.thread-link {
  display: block;
  padding: 14px 6px;
  border-bottom: 1px solid var(--border);
  color: inherit;
  transition: background-color 150ms ease, padding-left 150ms ease;
}
.thread-link:hover {
  background: var(--accent-soft);
  padding-left: 12px;
  text-decoration: none;
}
.thread-link:last-child { border-bottom: none; }
.thread-link .title {
  color: var(--text);
  font-weight: 600;
  font-size: 15.5px;
  letter-spacing: -0.005em;
}
.thread-link:hover .title { color: var(--accent-press); }
.thread-link .sub {
  color: var(--muted);
  font-size: 12.5px;
  margin-top: 3px;
}

/* ---------- Posts ---------- */

.post {
  border-top: 1px solid var(--border);
  padding: 16px 0;
}
.post:first-of-type { border-top: none; padding-top: 4px; }
.post-content {
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  margin-top: 8px;
  color: var(--text);
  line-height: 1.6;
  max-width: 68ch;
}

/* ---------- Invite code chip ---------- */

.invite-code {
  font-family: var(--font-mono);
  font-size: 13.5px;
  background: var(--accent-soft);
  color: var(--accent-press);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid oklch(0.9 0.04 255);
  letter-spacing: 0.02em;
}

/* ---------- Tabs (kept for future use) ---------- */

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.tabs button {
  background: transparent;
  color: var(--muted);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 10px 14px;
  font-weight: 500;
  box-shadow: none;
}
.tabs button:hover { background: transparent; color: var(--text); }
.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  header { padding: 12px 16px; }
  main { padding: 20px 14px 60px; }
  nav { gap: 12px; font-size: 13.5px; }
  nav .handle { padding: 3px 8px; }
  .card { padding: 16px 16px; border-radius: var(--radius-sm); }
  h2 { font-size: 19px; }
}

/* Respect user motion prefs */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}