/* Guitar Basics 101 - Modern Redesign */
:root {
  --bg: #0f1115;
  --bg-elevated: #1a1d24;
  --bg-card: #22262f;
  --text: #e8eaed;
  --text-muted: #9aa0a6;
  --accent: #e8a838;
  --accent-hover: #f0b94d;
  --wood: #8b5e3c;
  --border: #2d323c;
  --success: #34a853;
  --radius: 12px;
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', var(--font);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-hover); }

/* Header */
.site-header {
  background: rgba(15,17,21,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-muted);
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover,
.nav a.active {
  color: var(--text);
  background: var(--bg-card);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem 0.7rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #1a1d24 0%, #0f1115 60%, #1a1510 100%);
  border-bottom: 1px solid var(--border);
  padding: 4rem 1.5rem 3.5rem;
  text-align: center;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.hero h1 span { color: var(--accent); }

.hero p {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 560px;
  margin: 0 auto 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent);
  color: #1a1208;
  font-weight: 600;
  padding: 0.7rem 1.4rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: background .2s, transform .15s;
}

.btn:hover {
  background: var(--accent-hover);
  color: #1a1208;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  flex: 1;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Cards grid */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .2s, transform .2s;
}

.card:hover {
  border-color: #3d4450;
  transform: translateY(-2px);
}

.card-body { padding: 1.35rem; }

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
  font-family: var(--font-display);
}

.card p { color: var(--text-muted); font-size: 0.95rem; }

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  margin-bottom: 0.6rem;
}

.badge-beginner { background: #1e3a2f; color: #6ee7a8; }
.badge-intermediate { background: #3a2e1e; color: #f0b94d; }
.badge-advanced { background: #3a1e28; color: #f87171; }

/* Video embeds */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  background: #000;
}

.video-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
}

.video-info { padding: 1.1rem 1.25rem; }

.video-info h3 { font-size: 1.05rem; margin-bottom: 0.3rem; }
.video-info p { color: var(--text-muted); font-size: 0.9rem; }

/* Tabs */
.tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.55rem 1.15rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all .2s;
}

.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  background: var(--accent);
  color: #1a1208;
  border-color: var(--accent);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Anatomy */
.anatomy-img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin: 1.5rem 0;
  background: var(--bg-elevated);
}

.note-box {
  background: var(--bg-elevated);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
}

/* News */
.news-list {
  list-style: none;
}

.news-list li {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.news-list li:last-child { border-bottom: none; }

.news-list a {
  color: var(--text);
  font-weight: 500;
  display: block;
  margin-bottom: 0.25rem;
}

.news-list a:hover { color: var(--accent); }

.news-meta { color: var(--text-muted); font-size: 0.85rem; }

.sources {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.sources a {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
}

.sources a:hover { border-color: var(--accent); color: var(--accent); }

/* Footer */
.site-footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 0.75rem;
  }
  .nav.open { display: flex; }
  .header-inner { flex-wrap: wrap; }
  .hero { padding: 2.5rem 1.25rem; }
}

/* Utility */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-muted { color: var(--text-muted); }
.flex-center { display: flex; justify-content: center; gap: 0.75rem; flex-wrap: wrap; }