/* core.css — Design tokens, reset, typography, navbar, theme toggle */

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --border: #e2e8f0;
  --border-subtle: #f1f5f9;
  --court-green: #2d5a27;
  --court-green-light: #3d7a37;
  --brand-green: #16a34a;
  --green-primary: #16a34a;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.12);
  --status-orange: #f59e0b;
  --status-gray: #6b7280;
  --accent-cyan: #0891b2;
  --accent-amber: #f59e0b;
  --accent-emerald: #10b981;
}

html[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(255,255,255,0.08);
  --border-color: #334155;
  --border-subtle: rgba(255,255,255,0.04);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

/* Navigation Bar */
nav {
  position: sticky;
  top: 0;
  height: 52px;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
  transition: background-color 0.2s, border-color 0.2s;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-logo svg { width: 100%; height: 100%; }

.nav-brand {
  font-size: 1rem;
  font-weight: 700;
  color: var(--brand-green);
}

.nav-center {
  flex: 1;
  margin: 0 32px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover { color: var(--brand-green); }

.nav-link.active { color: var(--brand-green); }

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brand-green);
}

html[data-theme="dark"] .nav-link { color: #94a3b8; }
html[data-theme="dark"] .nav-link:hover { color: #4ade80; }
html[data-theme="dark"] .nav-link.active { color: #4ade80; }
html[data-theme="dark"] .nav-link.active::after { background-color: #4ade80; }

.nav-right {
  display: flex;
  align-items: center;
}

.toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--text-primary);
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

.toggle-btn:hover { color: var(--brand-green); }

/* Burger menu & mobile nav */
.nav-home-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.nav-burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: 6px;
  border-radius: 6px;
  margin-left: 4px;
  transition: background 0.15s;
}
.nav-burger:hover { background: var(--bg-tertiary); }

/* Nav scroll shadow */
nav.nav-scrolled {
  box-shadow: 0 1px 6px rgba(0,0,0,0.09);
}
html[data-theme="dark"] nav.nav-scrolled {
  box-shadow: 0 1px 6px rgba(0,0,0,0.35);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
}

.footer-content {
  max-width: 600px;
  margin: 0 auto;
}

.footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.footer a {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent-cyan);
  transition: opacity 0.2s;
}

.footer a:hover {
  opacity: 0.8;
}

@media (max-width: 640px) {
  .nav-brand { display: block; }
  .nav-burger { display: flex; align-items: center; justify-content: center; }
  .nav-center {
    display: none;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 99;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }
  nav.nav-open .nav-center { display: flex; }
  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    padding: 8px 24px 12px;
    gap: 0;
  }
  .nav-link {
    display: block;
    padding: 10px 0;
    font-size: 0.95rem;
    width: 100%;
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav-link:last-child { border-bottom: none; }
}