/* === Elijah Sensei — White Premium Theme === */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+TC:wght@400;500;600;700&display=swap');

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

/* Base */
:root {
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --text: #1a1a1a;
  --text-muted: #555;
  --text-light: #888;
  --accent: #1a1a1a;
  --gold: #b8860b;
  --gold-bg: #faf5eb;
  --border: #e8e8e8;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
  --radius: 12px;
  --max-w: 800px;
  --nav-h: 64px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, 'Noto Sans TC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

/* --- Nav --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.3px;
}
.nav-brand:hover { color: var(--gold); }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); font-weight: 600; }

/* --- Hero --- */
.hero {
  padding: 100px 24px 80px;
  text-align: center;
}
.hero-inner { max-width: 640px; margin: 0 auto; }
.hero-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: #333;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--text);
  color: var(--text);
}
.btn-sm {
  padding: 9px 20px;
  font-size: 13px;
}

/* --- Sections --- */
.section {
  padding: 80px 24px;
}
.section-alt {
  background: var(--bg-alt);
}
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.section-header {
  margin-bottom: 48px;
}
.section-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 8px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
}

/* --- Topics Grid --- */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.topic-card {
  padding: 28px 24px 28px 28px;
  border-left: 3px solid var(--gold);
  background: var(--bg);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.topic-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.topic-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}
.topic-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --- Resource Card --- */
.resource-card {
  display: block;
  padding: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.2s;
}
.resource-card:hover {
  border-color: #ccc;
  box-shadow: var(--shadow);
  color: var(--text);
  transform: translateY(-2px);
}
.resource-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.resource-type {
  font-size: 12px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.5px;
}
.resource-date {
  font-size: 12px;
  color: var(--text-light);
}
.resource-card-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.3;
}
.resource-card-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}
.resource-card-arrow {
  display: flex;
  justify-content: flex-end;
  margin-top: 12px;
  font-size: 14px;
  color: #ccc;
}
.resource-card:hover .resource-card-arrow { color: var(--text); }

/* --- Filter Tabs --- */
.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.filter-tab {
  padding: 7px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.filter-tab:hover {
  border-color: #bbb;
  color: var(--text);
}
.filter-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* --- About Preview (homepage) --- */
.about-preview-text {}
.about-preview-desc {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}
.about-preview-highlight {
  font-size: 15px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 28px;
  padding-left: 16px;
  border-left: 3px solid var(--gold);
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--accent);
  padding: 72px 24px;
  text-align: center;
}
.cta-banner-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.cta-banner-title {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.cta-banner-desc {
  font-size: 15px;
  color: #999;
  margin-bottom: 28px;
}
.cta-banner-btn {
  display: inline-block;
  padding: 13px 32px;
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
}
.cta-banner-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255,255,255,0.15);
  color: var(--text);
}

/* --- Footer --- */
.footer {
  padding: 48px 24px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-links a:hover { color: var(--text); }
.footer-copy {
  font-size: 12px;
  color: var(--text-light);
}

/* --- Links Page --- */
.links-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: var(--bg-alt);
}
.links-container {
  max-width: 420px;
  width: 100%;
  text-align: center;
}
.links-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 700;
  margin: 0 auto 20px;
}
.links-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
}
.links-bio {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.6;
}
.link-btn {
  display: block;
  padding: 16px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  margin-bottom: 12px;
  transition: all 0.2s;
}
.link-btn:hover {
  border-color: var(--gold);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
  color: var(--text);
}

/* --- About Page --- */
.about-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px;
}
.about-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 36px;
  letter-spacing: -0.5px;
}
.about-text {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.about-highlight {
  background: var(--gold-bg);
  border-left: 3px solid var(--gold);
  padding: 20px 24px;
  margin: 32px 0;
  border-radius: 0 8px 8px 0;
}
.about-highlight p {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.6;
}
.about-what-i-do {
  margin: 48px 0;
}
.about-what-i-do h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}
.about-list {
  list-style: none;
}
.about-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  font-size: 16px;
  line-height: 1.6;
}
.about-list li:last-child {
  border-bottom: none;
}
.about-list li strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
}
.about-list li span {
  color: var(--text-muted);
  font-size: 14px;
}
.about-cta {
  display: flex;
  gap: 12px;
  margin-top: 48px;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state p {
  font-size: 15px;
  margin-bottom: 12px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero { padding: 64px 20px 48px; }
  .hero-title { font-size: 32px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }

  .section { padding: 56px 20px; }
  .section-title { font-size: 24px; }

  .topics-grid { grid-template-columns: 1fr; }

  .about-content { padding: 48px 20px; }
  .about-title { font-size: 28px; }
  .about-cta { flex-direction: column; }
  .about-cta .btn { text-align: center; justify-content: center; }

  .footer-inner { flex-direction: column; gap: 16px; }

  .cta-banner { padding: 56px 20px; }
  .cta-banner-title { font-size: 22px; }
}