/* FitnessForge Hub - Main Stylesheet */
:root {
  --bg-primary: #0f1419;
  --bg-secondary: #1a2332;
  --bg-card: #1e2a3a;
  --text-primary: #e8edf2;
  --text-secondary: #8b9bb4;
  --text-muted: #5a6a7e;
  --accent: #ff6b35;
  --accent-hover: #ff8c5a;
  --accent-secondary: #00d4aa;
  --vip-gold: #ffd700;
  --border: #2a3a4e;
  --success: #00d4aa;
  --danger: #ff4757;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* Header */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
}
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.logo-icon { font-size: 28px; }
.logo-text { font-size: 22px; font-weight: 800; color: var(--text-primary); }
.logo-accent { color: var(--accent); }
.search-box {
  flex: 1;
  max-width: 400px;
  display: flex;
  background: var(--bg-card);
  border-radius: 8px;
  overflow: hidden;
}
.search-box input {
  flex: 1;
  background: none;
  border: none;
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}
.search-box button {
  background: var(--accent);
  border: none;
  padding: 0 16px;
  cursor: pointer;
  font-size: 16px;
}
.nav { display: flex; align-items: center; gap: 16px; }
.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-link:hover, .nav-link.active { color: var(--accent); }
.vip-link { color: var(--vip-gold); }
.auth-btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}
.auth-btn:hover { background: var(--accent-hover); }

/* Hero */
.hero {
  background: linear-gradient(135deg, #1a0f0a 0%, #2d1810 50%, #0f1a15 100%);
  padding: 40px 0;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: rgba(255,107,53,0.15);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero-title {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.2;
}
.hero-subtitle {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto 24px;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
}
.stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
}
.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Ad Slot */
.ad-slot {
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  margin: 20px 0;
  font-size: 14px;
}

/* Tools */
.tools-section { padding: 24px 0; }
.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.tool-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--border);
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.tool-icon { font-size: 36px; margin-bottom: 8px; }
.tool-card h3 { font-size: 16px; margin-bottom: 4px; }
.tool-card p { font-size: 13px; color: var(--text-secondary); }

/* Filters */
.filters-section {
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 70px;
}
.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* Content Grid */
.content-section { padding: 24px 0; }
.content-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.content-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--border);
}
.content-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.card-cover {
  height: 180px;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 60px;
  position: relative;
}
.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.card-category {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0,0,0,0.7);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}
.card-vip {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--vip-gold);
  color: #000;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}
.card-info { padding: 14px; }
.card-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.3;
}
.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
}
.card-rating { color: var(--accent); font-weight: 600; }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}
.page-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}
.page-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* VIP Section */
.vip-section { padding: 40px 0; }
.vip-card {
  background: linear-gradient(135deg, #2d1f0a 0%, #1a2332 100%);
  border: 2px solid var(--vip-gold);
  border-radius: 16px;
  padding: 40px;
  text-align: center;
}
.vip-badge {
  display: inline-block;
  background: rgba(255,215,0,0.15);
  color: var(--vip-gold);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}
.vip-title { font-size: 32px; margin-bottom: 20px; }
.vip-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 700px;
  margin: 0 auto 24px;
  text-align: left;
}
.vip-feature { font-size: 14px; color: var(--text-secondary); }
.vip-pricing { margin-bottom: 20px; }
.vip-price {
  font-size: 48px;
  font-weight: 800;
  color: var(--vip-gold);
}
.vip-period { font-size: 18px; color: var(--text-secondary); }
.vip-yearly {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}
.vip-btn {
  background: var(--vip-gold);
  color: #000;
  border: none;
  padding: 14px 40px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s;
}
.vip-btn:hover { transform: scale(1.05); }
.vip-note { font-size: 12px; color: var(--text-muted); margin-top: 12px; }

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 40px 0 20px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 24px;
}
.footer-col h4 {
  font-size: 15px;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.footer-col p, .footer-col a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  margin-bottom: 8px;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 1000;
}
.modal.show { display: block; }
.modal-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
}
.modal-content, .modal-auth, .modal-vip, .modal-tool {
  position: relative;
  background: var(--bg-secondary);
  border-radius: 16px;
  max-width: 800px;
  margin: 40px auto;
  max-height: 90vh;
  overflow-y: auto;
  z-index: 1001;
}
.modal-close {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(0,0,0,0.5);
  border: none;
  color: white;
  width: 32px; height: 32px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  z-index: 10;
}
.modal-hero {
  height: 200px;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  border-radius: 16px 16px 0 0;
}
.modal-body { padding: 24px; }
.modal-body h2 { font-size: 24px; margin-bottom: 8px; }
.modal-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.modal-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.modal-tab {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
}
.modal-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.modal-tab-content { display: none; }
.modal-tab-content.active { display: block; }

/* Auth Modal */
.modal-auth { max-width: 400px; padding: 32px; }
.auth-tabs {
  display: flex;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.auth-tab {
  flex: 1;
  background: none;
  border: none;
  padding: 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}
.auth-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.auth-form label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.auth-form input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  color: var(--text-primary);
  font-size: 14px;
  margin-bottom: 16px;
  outline: none;
}
.auth-form input:focus { border-color: var(--accent); }
.auth-submit {
  width: 100%;
  background: var(--accent);
  color: white;
  border: none;
  padding: 12px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}
.auth-switch {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 16px;
}
.auth-switch a { color: var(--accent); }

/* VIP Modal */
.modal-vip { max-width: 500px; padding: 32px; }
.vip-modal-header { text-align: center; margin-bottom: 24px; }
.vip-star { font-size: 48px; }
.vip-modal-header h2 { font-size: 24px; margin: 8px 0; }
.vip-modal-header p { color: var(--text-secondary); font-size: 14px; }
.vip-plans {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.vip-plan {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  position: relative;
}
.vip-plan.best-value {
  border-color: var(--vip-gold);
  background: rgba(255,215,0,0.05);
}
.best-value-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--vip-gold);
  color: #000;
  padding: 2px 12px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
}
.vip-plan h3 { font-size: 16px; margin-bottom: 8px; }
.vip-plan-price {
  font-size: 32px;
  font-weight: 800;
  color: var(--vip-gold);
}
.vip-plan-price span { font-size: 14px; color: var(--text-secondary); }
.vip-plan-save { font-size: 12px; color: var(--success); margin: 4px 0 12px; }
.vip-plan-btn {
  width: 100%;
  background: var(--accent);
  color: white;
  border: none;
  padding: 10px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}
.vip-plan.best-value .vip-plan-btn { background: var(--vip-gold); color: #000; }
.vip-modal-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

/* Tool Modal */
.modal-tool { max-width: 500px; padding: 32px; }
.tool-result {
  background: var(--bg-card);
  border-radius: 8px;
  padding: 20px;
  margin-top: 16px;
  text-align: center;
}
.tool-result-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
}
.tool-result-label { font-size: 14px; color: var(--text-secondary); }

/* Guide content styles */
.guide-section { margin-bottom: 20px; }
.guide-section h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--accent);
}
.guide-section h4 {
  font-size: 15px;
  margin: 12px 0 6px;
}
.guide-section p {
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-size: 14px;
}
.guide-section ul {
  margin-left: 20px;
  color: var(--text-secondary);
  font-size: 14px;
}
.guide-section li { margin-bottom: 6px; }
.guide-table {
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0;
  font-size: 13px;
}
.guide-table th, .guide-table td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.guide-table th {
  background: var(--bg-card);
  color: var(--accent);
  font-weight: 600;
}
.guide-tip {
  background: rgba(255,107,53,0.1);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  border-radius: 4px;
  margin: 10px 0;
  font-size: 13px;
  color: var(--text-secondary);
}
.guide-warning {
  background: rgba(255,71,87,0.1);
  border-left: 3px solid var(--danger);
  padding: 10px 14px;
  border-radius: 4px;
  margin: 10px 0;
  font-size: 13px;
}

/* Responsive */
@media (max-width: 1024px) {
  .content-grid { grid-template-columns: repeat(3, 1fr); }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .content-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 28px; }
  .hero-stats { gap: 24px; }
  .nav { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .vip-features { grid-template-columns: 1fr; }
}