/* ── pinboard: landing + auth pages ──────────────────────────────────────
   Explicit color palette (the previous CSS leaned on `AccentColor` system
   color, which resolves to near-white in many browsers — submit buttons
   were invisible). All button + link colors are now explicit hex so the
   page renders predictably across UAs.
*/

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #64748b;
  --accent: #4f46e5;          /* indigo-600 */
  --accent-hover: #4338ca;    /* indigo-700 */
  --accent-fg: #ffffff;
  --card-bg: #f8fafc;
  --border: #e2e8f0;
  --input-bg: #ffffff;
  --err-bg: #fef2f2;
  --err-fg: #b91c1c;
  --err-border: #fecaca;
  --ok-bg: #f0fdf4;
  --ok-fg: #166534;
  --ok-border: #bbf7d0;
  --ring: rgba(99, 102, 241, 0.45);  /* indigo-500/45 */
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f1a;
    --fg: #e2e8f0;
    --muted: #94a3b8;
    --accent: #818cf8;        /* indigo-400 */
    --accent-hover: #a5b4fc;
    --accent-fg: #0b0f1a;
    --card-bg: #111827;
    --border: #1f2937;
    --input-bg: #0b0f1a;
    --err-bg: #1f1212;
    --err-fg: #fca5a5;
    --err-border: #7f1d1d;
    --ok-bg: #0c1a13;
    --ok-fg: #86efac;
    --ok-border: #14532d;
    --ring: rgba(129, 140, 248, 0.45);
    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.25), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}

.card {
  width: min(440px, 100%);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem;
  display: grid;
  gap: 1.25rem;
  box-shadow: var(--shadow-card);
}

h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p { margin: 0; }

form { display: grid; gap: 0.9rem; }

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--fg);
}

label small {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 400;
}

input {
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--fg);
  font: inherit;
  transition: border-color 120ms, box-shadow 120ms;
}

input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--ring);
}

input::placeholder { color: var(--muted); opacity: 0.7; }

button {
  padding: 0.65rem 1.1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 120ms, transform 80ms;
}

button:hover { background: var(--accent-hover); }
button:active { transform: translateY(1px); }
button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--ring);
}

button[type="submit"] { padding-block: 0.7rem; }

/* Alerts */

.err {
  color: var(--err-fg);
  background: var(--err-bg);
  border: 1px solid var(--err-border);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  font-size: 0.875rem;
}

.ok {
  color: var(--ok-fg);
  background: var(--ok-bg);
  border: 1px solid var(--ok-border);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  font-size: 0.875rem;
}

/* Links + secondary text */

.links, .lede, .fineprint {
  font-size: 0.875rem;
  color: var(--muted);
}

.links a, .lede a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.links a:hover, .lede a:hover { text-decoration: underline; }

a { color: var(--accent); }

/* Landing-specific layout */

.landing .lede { font-size: 1.0625rem; line-height: 1.55; }

.cta-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0;
}

.btn {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  padding: 0.7rem 1.1rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
  transition: background-color 120ms;
}

.btn:hover { background: var(--accent-hover); }

.btn.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}

.btn.ghost:hover { background: var(--card-bg); border-color: var(--accent); }

.fineprint {
  font-size: 0.8125rem;
  border-top: 1px solid var(--border);
  padding-top: 0.875rem;
  margin-top: 0.25rem;
}

/* Auth-pages-specific small touches */

.card h1 + form { margin-top: 0.25rem; }