/**
 * Shared UI tokens & primitives — load before page-specific CSS.
 */
:root {
  --ui-font: "Plus Jakarta Sans", "Poppins", system-ui, -apple-system, sans-serif;
  --ui-bg: #eef2f7;
  --ui-bg-mesh: radial-gradient(1200px 600px at 10% -10%, rgba(20, 184, 166, 0.12), transparent),
    radial-gradient(900px 500px at 100% 0%, rgba(79, 70, 229, 0.1), transparent),
    linear-gradient(180deg, #f8fafc 0%, #eef2f7 45%, #e8edf5 100%);
  --ui-surface: #ffffff;
  --ui-surface-2: #f8fafc;
  --ui-primary: #0d9488;
  --ui-primary-hover: #0f766e;
  --ui-accent: #4f46e5;
  --ui-danger: #dc2626;
  --ui-danger-hover: #b91c1c;
  --ui-text: #0f172a;
  --ui-text-muted: #64748b;
  --ui-border: #e2e8f0;
  --ui-radius: 16px;
  --ui-radius-sm: 12px;
  --ui-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 10px 24px -4px rgba(15, 23, 42, 0.08);
  --ui-shadow-lg: 0 25px 50px -12px rgba(15, 23, 42, 0.18);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

/* ---------- Auth / card shell ---------- */
.ui-page {
  min-height: 100vh;
  margin: 0;
  font-family: var(--ui-font);
  color: var(--ui-text);
  background: var(--ui-bg-mesh);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 40px);
}

.ui-card {
  width: 100%;
  max-width: 440px;
  background: var(--ui-surface);
  border-radius: var(--ui-radius);
  box-shadow: var(--ui-shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.8);
  padding: clamp(28px, 4vw, 40px);
}

.ui-card--wide {
  max-width: 520px;
}

.ui-brand {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ui-primary);
  margin-bottom: 8px;
  text-align: center;
}

.ui-title {
  margin: 0 0 8px;
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 700;
  text-align: center;
  color: var(--ui-text);
  line-height: 1.25;
}

.ui-sub {
  margin: 0 0 24px;
  font-size: 0.9rem;
  color: var(--ui-text-muted);
  text-align: center;
  line-height: 1.5;
}

/* ---------- Forms ---------- */
.ui-field {
  margin-bottom: 16px;
  text-align: left;
}

.ui-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ui-text);
  margin-bottom: 6px;
}

.ui-input,
.ui-card input[type="text"],
.ui-card input[type="password"],
.ui-card input[type="email"],
.ui-card input[type="tel"],
.ui-card input[type="number"],
.ui-card input[type="date"],
.ui-card input[type="file"],
.ui-card select,
.ui-card textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius-sm);
  background: var(--ui-surface-2);
  color: var(--ui-text);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.ui-input:focus,
.ui-card input:focus,
.ui-card select:focus,
.ui-card textarea:focus {
  outline: none;
  border-color: var(--ui-primary);
  background: var(--ui-surface);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.2);
}

.ui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--ui-radius-sm);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

.ui-btn:active {
  transform: scale(0.98);
}

.ui-btn--primary {
  background: linear-gradient(135deg, var(--ui-primary) 0%, #0f766e 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
}

.ui-btn--primary:hover {
  background: linear-gradient(135deg, var(--ui-primary-hover) 0%, #0d5c56 100%);
  box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
}

.ui-btn--ghost {
  background: transparent;
  color: var(--ui-accent);
  border: 1px solid var(--ui-border);
  margin-top: 8px;
}

.ui-btn--ghost:hover {
  background: var(--ui-surface-2);
}

/* ---------- Alerts ---------- */
.ui-alert {
  padding: 12px 14px;
  border-radius: var(--ui-radius-sm);
  font-size: 0.875rem;
  line-height: 1.45;
  margin-bottom: 16px;
  text-align: left;
}

.ui-alert--error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.ui-alert--success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.ui-alert--warn {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid #fde68a;
}

.ui-footer-links {
  margin-top: 20px;
  text-align: center;
  font-size: 0.875rem;
}

.ui-footer-links a {
  color: var(--ui-accent);
  font-weight: 600;
  text-decoration: none;
}

.ui-footer-links a:hover {
  text-decoration: underline;
}