/* HeadStudio — Shared Design System */
:root {
  --bg: #06080C;
  --bg-elevated: #0D1117;
  --glass: rgba(22, 27, 34, 0.45);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-strong: rgba(22, 27, 34, 0.65);
  --text: #E6EDF3;
  --text-dim: #8B949E;
  --text-muted: #484F58;
  --accent: #00D084;
  --accent-glow: rgba(0, 208, 132, 0.12);
  --accent-deep: #00A368;
  --danger: #F85149;
  --warning: #D29922;
  --serif: 'Playfair Display', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
  --blur: 24px;
  --radius: 20px;
  --radius-sm: 12px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Glass panels */
.glass {
  background: var(--glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}

.glass-strong {
  background: var(--glass-strong);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}

/* ─── Fixed Nav (matches landing page) ─── */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1rem 2rem;
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(6, 8, 12, 0.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--glass-border);
}

.site-nav .logo {
  font-family: var(--sans);
  font-weight: 600; font-size: 1.1rem;
  letter-spacing: -0.01em;
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
}

.site-nav .logo:hover { text-decoration: none; }

.site-nav .logo-mark {
  width: 32px; height: 32px;
  border-radius: 10px;
  background: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}

.site-nav .logo-mark::before {
  content: '';
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 16px var(--accent), 0 0 4px var(--accent);
}

.site-nav .nav-badge {
  margin-left: auto;
}

/* Layout */
.page-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  padding-top: 5rem; /* clear fixed nav */
  min-height: 100vh;
}

.page-container.wide { max-width: 1100px; }

/* Legacy Header (kept for compat) */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--glass-border);
}

@media (max-width: 640px) {
  .site-nav { padding: 0.85rem 1.25rem; }
}

.page-header .logo {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 40px rgba(0,208,132,0.15), 0 4px 16px rgba(0,0,0,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(0,208,132,0.25), 0 8px 24px rgba(0,0,0,0.4);
  background: #00E892;
  text-decoration: none;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--glass);
  color: var(--text);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: var(--glass-strong);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  padding: 0.5rem 1rem;
}

.btn-ghost:hover { color: var(--text); text-decoration: none; }

.btn-danger {
  background: rgba(248, 81, 73, 0.15);
  color: var(--danger);
  border: 1px solid rgba(248, 81, 73, 0.3);
}

/* Section headings */
.page-title {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: var(--text-dim);
  font-size: 1rem;
  margin-bottom: 2rem;
}

/* Cards */
.card {
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-accent {
  background: var(--accent-glow);
  color: var(--accent);
}

.badge-warning {
  background: rgba(210, 153, 34, 0.15);
  color: var(--warning);
}

.badge-danger {
  background: rgba(248, 81, 73, 0.15);
  color: var(--danger);
}

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 100px;
  overflow: hidden;
}

.progress-bar .fill {
  height: 100%;
  background: var(--accent);
  border-radius: 100px;
  transition: width 0.6s ease;
}

/* Messages */
.message {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.message-error {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.25);
  color: var(--danger);
}

.message-success {
  background: var(--accent-glow);
  border: 1px solid rgba(0, 208, 132, 0.25);
  color: var(--accent);
}

/* Loading spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 640px) {
  .page-container { padding: 1rem; }
  .page-title { font-size: 1.6rem; }
}