:root {
  --t-serif: 'Instrument Serif', Georgia, serif;
  --t-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --t-ink: #0c1222;
  --t-slate: #334155;
  --t-muted: #5c6b82;
  --t-line: rgba(12, 18, 34, 0.08);
  --t-bg: #fafbfe;
  --t-white: #ffffff;
  --t-accent: #2563eb;
  --t-accent-hover: #1d4ed8;
  --t-radius: 16px;
  --t-radius-sm: 10px;
  --t-shadow: 0 8px 32px rgba(12, 18, 34, 0.08);
  --t-shadow-lg: 0 24px 64px rgba(12, 18, 34, 0.1);

  /* legacy aliases */
  --brand-navy: var(--t-ink);
  --brand-slate: var(--t-slate);
  --brand-muted: var(--t-muted);
  --brand-light: var(--t-bg);
  --brand-white: var(--t-white);
  --brand-accent: var(--t-accent);
  --brand-accent-hover: var(--t-accent-hover);
  --radius: var(--t-radius);
  --shadow: var(--t-shadow);
  --font: var(--t-sans);
}

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

body {
  margin: 0;
  font-family: var(--t-sans);
  color: var(--t-ink);
  background: var(--t-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--t-accent); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--t-accent-hover); }

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

/* ── Header ── */
.site-header {
  background: rgba(250, 251, 254, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--t-line);
  box-shadow: 0 4px 24px rgba(12, 18, 34, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--t-ink);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.logo span { color: var(--t-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--t-muted);
  font-weight: 500;
  font-size: 0.9rem;
}

.nav-links a:hover { color: var(--t-ink); }

.nav-links a.nav-cta {
  padding: 0.55rem 1.1rem;
  border-radius: var(--t-radius-sm);
  background: var(--t-ink);
  color: white !important;
  font-weight: 600;
}

.nav-links a.nav-cta:hover {
  background: #1a2540;
  color: white !important;
}

.nav-logout-form {
  display: inline;
  margin: 0;
}

.nav-logout-form button {
  background: none;
  border: none;
  padding: 0;
  color: var(--t-muted);
  font-weight: 500;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
}

.nav-logout-form button:hover {
  color: var(--t-ink);
}

/* ── Buttons ── */
.btn, .t-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--t-radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  font-family: inherit;
}

.btn-primary, .t-btn--primary {
  background: var(--t-ink);
  color: white !important;
  box-shadow: 0 4px 16px rgba(12, 18, 34, 0.15);
}

.btn-primary:hover, .t-btn--primary:hover {
  background: #1a2540;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(12, 18, 34, 0.2);
  color: white !important;
}

.btn-outline, .t-btn--ghost {
  background: var(--t-white);
  border: 1px solid var(--t-line);
  color: var(--t-ink) !important;
}

.btn-outline:hover, .t-btn--ghost:hover {
  border-color: #cbd5e1;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(12, 18, 34, 0.06);
  color: var(--t-ink) !important;
}

.btn-ghost {
  background: transparent;
  color: var(--t-muted) !important;
}

/* ── Cards ── */
.card, .t-card {
  background: var(--t-white);
  border-radius: var(--t-radius);
  padding: 1.75rem;
  box-shadow: var(--t-shadow);
  border: 1px solid var(--t-line);
}

.card h3, .t-card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; }
.card p, .t-card p { margin: 0; color: var(--t-muted); font-size: 0.95rem; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

/* ── Footer ── */
.site-footer {
  background: var(--t-ink);
  color: #94a3b8;
  padding: 4rem 0 2rem;
  margin-top: 0;
}

.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: white; }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid h4 {
  color: white;
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 1.5rem;
  font-size: 0.85rem;
}

/* ── Messages ── */
.messages {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}

.messages li {
  padding: 0.75rem 1rem;
  border-radius: var(--t-radius-sm);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.messages .success { background: #dcfce7; color: #166534; }
.messages .error { background: #fee2e2; color: #991b1b; }
.messages .info { background: #dbeafe; color: #1e40af; }

/* ── Forms ── */
.form-group { margin-bottom: 1.1rem; }

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.88rem;
  color: var(--t-ink);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid #e2e8f0;
  border-radius: var(--t-radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--t-white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--t-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-group .helptext {
  font-size: 0.8rem;
  color: var(--t-muted);
  margin-top: 0.3rem;
}

.form-errors {
  color: #b91c1c;
  font-size: 0.85rem;
  margin: 0.25rem 0 0;
  list-style: none;
  padding: 0;
}

/* ── Reveal animation (site-wide) ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}