/* Modern, clean auth styles (light/dark friendly) */

:root {
  --bg-start: #0e1027;
  --bg-end: #1b2561;
  --card-bg: #ffffff;
  --text: #1f2430;
  --muted: #5f6b8a;
  --border: #e8eaf1;
  --primary: #2a5298;
  --primary-900: #1e3c72;
  --success: #1fa97a;
  --danger: #d45a5a;
  --pre-scale: 1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --card-bg: #0f132a;
    --text: #e3e7f5;
    --muted: #9aa7cc;
    --border: #1f2751;
    --primary: #6aa2ff;
    --primary-900: #4a7be0;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
    Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
  color: var(--text);
}

.page {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  background: radial-gradient(1200px 600px at 100% -10%, rgba(255,255,255,0.08), rgba(255,255,255,0) 40%),
              radial-gradient(1000px 600px at -20% 120%, rgba(255,255,255,0.06), rgba(255,255,255,0) 45%),
              linear-gradient(135deg, var(--bg-start), var(--bg-end));
  padding: 24px;
  overflow-x: hidden;
}

.card.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: 0 20px 50px rgba(0,0,0,0.25);
  border-radius: 14px;
  padding: 28px 24px;
  animation: floatIn .5s ease;
  will-change: transform;
}

/* Early pre-scale to avoid size jump when Desktop Site is enabled on mobile */
.pre-scale-card .auth-card {
  transform: scale(var(--pre-scale));
  transform-origin: top center;
}

@keyframes floatIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0);} }

.brand { text-align: center; margin-bottom: 18px; }
.brand .logo { font-size: 32px; line-height: 1; }
.brand h1 { font-size: 22px; margin: 8px 0 6px; }
.brand .subtitle { color: var(--muted); font-size: 14px; margin: 0; }

.alert {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.03);
  margin: 8px 0 14px;
  font-size: 14px;
}
.alert.error { border-left: 4px solid var(--danger); }
.alert.success { border-left: 4px solid var(--success); }

.form { margin-top: 4px; }
.input-group { margin: 12px 0; }
.input-group label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}
.input-group input {
  width: 100%;
  padding: 12px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: inherit;
  outline: none;
  transition: box-shadow .18s ease, border-color .18s ease;
}
.input-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 20%, transparent);
}

/* Input wrapper for action buttons (show/hide) */
.input-wrapper {
  position: relative;
}
.input-wrapper input {
  padding-right: 40px;
}
.input-action {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
  font-size: 12px;
}
.input-action:hover { filter: brightness(1.1); }

/* Field errors */
.field-error {
  margin-top: 6px;
  font-size: 12px;
  color: var(--danger);
}
.input-group.invalid input {
  border-color: var(--danger);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--danger) 20%, transparent);
}

/* CapsLock indicator */
.caps-indicator {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

/* Loading state for submit button */
.btn.loading {
  opacity: 0.85;
  pointer-events: none;
  position: relative;
}
.btn.loading::after {
  content: "";
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.5);
  border-top-color: #fff;
  display: inline-block;
  margin-left: 8px;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Improve readability when Chrome mobile uses Desktop Site */
/* When Chrome mobile forces a wide desktop viewport (Desktop Site),
   scale typography so it matches mobile sizing visually. */
@media (pointer: coarse) and (min-width: 900px) {
  /* Boost base font size relative to viewport width */
  html { font-size: clamp(18px, 3.6vw, 28px); }
  .card.auth-card {
    max-width: min(96vw, 640px);
    padding: 36px 28px;
  }
  .brand h1 { font-size: 26px; }
  .brand .subtitle { font-size: 16px; }
  .input-group label { font-size: 15px; }
  .form, .input-group input, .btn { font-size: 1.12rem; }
  .btn { padding: 16px 18px; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 14px;
  border: 0;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: transform .06s ease, filter .2s ease;
}
.btn.primary { background: linear-gradient(135deg, var(--primary), var(--primary-900)); color: #fff; }
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }

.form-footer {
  margin-top: 12px;
  display: flex;
  justify-content: center;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

.link { color: var(--primary); text-decoration: none; }
.link:hover { text-decoration: underline; }
.link.subtle { color: var(--muted); }

/* Make footer links look clickable by default */
.form-footer .link { text-decoration: underline; }