/**
 * Nova Academy - Components
 * Gold & Black Theme - Modern Premium Design
 * Buttons, Cards, Forms, Badges, Navigation, Hero, eBook Cards, Tables
 */

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn:focus { outline: none; box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.3); }

/* Primary Button (Gold) */
.btn-primary {
  background: var(--gold-gradient);
  color: var(--bg-darkest);
  border-color: transparent;
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
  background: var(--gold-gradient-hover);
  box-shadow: var(--shadow-gold-lg);
  transform: translateY(-2px);
  color: var(--bg-darkest);
}

.btn-primary:active { transform: translateY(0); }

/* Secondary Button (Outline Gold) */
.btn-secondary {
  background: transparent;
  color: var(--gold-primary);
  border-color: var(--border-gold);
}

.btn-secondary:hover {
  background: rgba(255, 215, 0, 0.1);
  border-color: var(--gold-primary);
  color: var(--gold-light);
}

/* Outline Button */
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-dark);
}

.btn-outline:hover { background: var(--bg-light); border-color: var(--border-darker); color: var(--text-primary); }

/* Ghost Button */
.btn-ghost { background: transparent; color: var(--text-secondary); border-color: transparent; }
.btn-ghost:hover { background: var(--bg-card); color: var(--text-primary); }

/* Danger Button */
.btn-danger { background: var(--error); color: white; border-color: var(--error); }
.btn-danger:hover { background: #dc2626; box-shadow: 0 0 20px rgba(239, 68, 68, 0.4); }

/* Success Button */
.btn-success { background: var(--success); color: white; border-color: var(--success); }
.btn-success:hover { background: #16a34a; box-shadow: 0 0 20px rgba(34, 197, 94, 0.4); }

/* Button Sizes */
.btn-sm { font-size: var(--text-sm); padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); }
.btn-lg { font-size: var(--text-lg); padding: var(--space-4) var(--space-6); border-radius: var(--radius-lg); }
.btn-xl { font-size: var(--text-xl); padding: var(--space-4) var(--space-8); border-radius: var(--radius-xl); }
.btn-block { display: flex; width: 100%; }

/* Loading State */
.btn-loading { pointer-events: none; opacity: 0.7; }
.btn-loading::after {
  content: '';
  width: 1em;
  height: 1em;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: rotate 1s linear infinite;
  margin-left: var(--space-2);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover { border-color: var(--border-gold); box-shadow: var(--shadow-gold); transform: translateY(-4px); }

.card-header { padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--border-dark); }
.card-body { padding: var(--space-5); }
.card-footer { padding: var(--space-4) var(--space-5); border-top: 1px solid var(--border-dark); background: rgba(255, 215, 0, 0.02); }

.card-gold {
  border: 1px solid var(--border-gold);
  background: linear-gradient(145deg, var(--bg-card) 0%, rgba(255, 215, 0, 0.03) 100%);
}

.card-gold:hover { border-color: var(--gold-primary); box-shadow: var(--gold-glow); }

.card-featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gold-gradient);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.card-subtitle { font-size: var(--text-sm); color: var(--text-muted); margin-bottom: var(--space-3); }
.card-text { color: var(--text-secondary); line-height: 1.6; }

/* ============================================
   FORMS
   ============================================ */
.form-group { margin-bottom: var(--space-4); }
.form-label { display: block; font-size: var(--text-sm); font-weight: var(--font-medium); color: var(--text-primary); margin-bottom: var(--space-2); }
.form-label-required::after { content: ' *'; color: var(--error); }
.form-hint { font-size: var(--text-xs); color: var(--text-muted); margin-top: var(--space-1); }
.form-error { font-size: var(--text-sm); color: var(--error); margin-top: var(--space-1); display: flex; align-items: center; gap: var(--space-1); }

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--gold-primary);
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
  background: var(--bg-light);
}

.form-input.error, .form-select.error, .form-textarea.error { border-color: var(--error); animation: shake 0.3s ease; }
.form-input-sm, .form-select-sm { font-size: var(--text-sm); padding: var(--space-2) var(--space-3); }
.form-input-lg, .form-select-lg { font-size: var(--text-lg); padding: var(--space-4) var(--space-5); }
.form-textarea { min-height: 120px; resize: vertical; }

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23FFD700' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 1.5em;
  padding-right: var(--space-10);
}

/* Input Icon */
.input-icon-wrapper { position: relative; }
.input-icon { position: absolute; left: var(--space-4); top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; }
.input-icon-wrapper .form-input { padding-left: var(--space-10); }

/* Checkbox & Radio */
.form-check { display: flex; align-items: flex-start; gap: var(--space-3); margin-bottom: var(--space-3); cursor: pointer; }
.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--border-darker);
  border-radius: var(--radius-sm);
  background: var(--bg-dark);
  cursor: pointer;
  appearance: none;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  margin-top: 2px;
}

.form-check-input:checked {
  background: var(--gold-primary);
  border-color: var(--gold-primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%230a0a0a' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  background-size: 75%;
  background-position: center;
  background-repeat: no-repeat;
}

.form-check-input[type="radio"] { border-radius: 50%; }
.form-check-input[type="radio"]:checked { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='%230a0a0a'%3E%3Ccircle cx='12' cy='12' r='6'/%3E%3C/svg%3E"); }

/* File Upload */
.file-upload { position: relative; display: inline-block; width: 100%; }
.file-upload-input { position: absolute; opacity: 0; width: 100%; height: 100%; cursor: pointer; }
.file-upload-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-6);
  border: 2px dashed var(--border-dark);
  border-radius: var(--radius-lg);
  background: var(--bg-dark);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  text-align: center;
}

.file-upload:hover .file-upload-label { border-color: var(--border-gold); background: rgba(255, 215, 0, 0.02); color: var(--text-primary); }

/* ============================================
   BADGES
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-gold { background: rgba(255, 215, 0, 0.15); color: var(--gold-primary); border: 1px solid var(--border-gold); }
.badge-success { background: rgba(34, 197, 94, 0.15); color: var(--success); border: 1px solid rgba(34, 197, 94, 0.3); }
.badge-error { background: rgba(239, 68, 68, 0.15); color: var(--error); border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-info { background: rgba(59, 130, 246, 0.15); color: var(--info); border: 1px solid rgba(59, 130, 246, 0.3); }

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-dark);
}

.nav-container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.nav-logo img { height: 40px; width: auto; }

.logo-text { display: flex; align-items: center; gap: var(--space-2); }
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--gold-gradient);
  border-radius: var(--radius-md);
  color: var(--bg-darkest);
}

.logo-icon svg { width: 24px; height: 24px; }
.logo-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); cursor: pointer; padding: var(--space-2); }
.nav-toggle svg { width: 24px; height: 24px; }

.nav-menu { display: flex; align-items: center; gap: var(--space-8); flex: 1; justify-content: center; }
.nav-links { display: flex; align-items: center; gap: var(--space-6); list-style: none; margin: 0; padding: 0; }

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold-gradient);
  transition: width var(--transition-base);
}

.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.admin-link { color: var(--gold-primary); }

.nav-actions { display: flex; align-items: center; gap: var(--space-4); }
.nav-cart { position: relative; display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; color: var(--text-secondary); border-radius: var(--radius-md); transition: all var(--transition-fast); }
.nav-cart:hover { background: var(--bg-light); color: var(--gold-primary); }
.nav-cart svg { width: 20px; height: 20px; }

.cart-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  min-width: 18px;
  height: 18px;
  background: var(--gold-gradient);
  color: var(--bg-darkest);
  font-size: 10px;
  font-weight: var(--font-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 5px;
}

.nav-user { display: flex; align-items: center; gap: var(--space-3); }
.user-name { font-size: var(--text-sm); color: var(--text-secondary); max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-auth { display: flex; align-items: center; gap: var(--space-2); }

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-darkest) 0%, var(--bg-dark) 50%, #15100a 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(255, 215, 0, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(212, 175, 55, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-container { max-width: var(--container-xl); margin: 0 auto; padding: var(--space-12) var(--space-4); width: 100%; position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: center; }
.hero-content { animation: fadeInUp 0.8s ease; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--gold-primary);
  margin-bottom: var(--space-6);
}

.hero-title { font-size: var(--text-5xl); line-height: 1.1; margin-bottom: var(--space-6); }
.hero-title span { display: block; }
.hero-title .highlight { background: var(--gold-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-description { font-size: var(--text-lg); color: var(--text-secondary); max-width: 500px; margin-bottom: var(--space-8); }
.hero-actions { display: flex; gap: var(--space-4); margin-bottom: var(--space-10); }
.hero-stats { display: flex; gap: var(--space-10); }
.hero-stat { text-align: center; }
.hero-stat-value { font-family: var(--font-display); font-size: var(--text-3xl); font-weight: var(--font-bold); color: var(--gold-primary); }
.hero-stat-label { font-size: var(--text-sm); color: var(--text-muted); }

.hero-image { position: relative; animation: fadeIn 1s ease 0.3s both; }
.hero-image img { width: 100%; border-radius: var(--radius-2xl); box-shadow: var(--shadow-xl); border: 1px solid var(--border-gold); }

/* ============================================
   EBOOK CARDS
   ============================================ */
.ebook-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  position: relative;
}

.ebook-card:hover { border-color: var(--border-gold); box-shadow: var(--shadow-gold); transform: translateY(-8px); }

.ebook-card-featured::before {
  content: 'Featured';
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--gold-gradient);
  color: var(--bg-darkest);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  z-index: 2;
}

.ebook-cover { position: relative; aspect-ratio: 2/3; overflow: hidden; }
.ebook-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.ebook-card:hover .ebook-cover img { transform: scale(1.05); }

.ebook-discount { position: absolute; top: var(--space-3); left: var(--space-3); background: var(--error); color: white; font-size: var(--text-xs); font-weight: var(--font-bold); padding: var(--space-1) var(--space-2); border-radius: var(--radius-sm); }

.ebook-info { padding: var(--space-5); }
.ebook-category { font-size: var(--text-xs); color: var(--gold-primary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-2); }
.ebook-title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: var(--font-semibold); color: var(--text-primary); margin-bottom: var(--space-2); line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ebook-author { font-size: var(--text-sm); color: var(--text-muted); margin-bottom: var(--space-3); }

.ebook-footer { display: flex; align-items: center; justify-content: space-between; margin-top: var(--space-4); }
.ebook-price { display: flex; align-items: center; gap: var(--space-2); }
.ebook-price-current { font-size: var(--text-xl); font-weight: var(--font-bold); color: var(--gold-primary); }
.ebook-price-original { font-size: var(--text-sm); color: var(--text-muted); text-decoration: line-through; }

.ebook-actions { display: flex; gap: var(--space-2); }
.ebook-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--bg-light);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ebook-btn:hover { background: var(--gold-gradient); border-color: transparent; color: var(--bg-darkest); }
.ebook-btn svg { width: 18px; height: 18px; }

/* ============================================
   CART STYLES
   ============================================ */
.cart-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  transition: all var(--transition-fast);
}

.cart-item:hover { border-color: var(--border-gold); }
.cart-item-image { width: 80px; height: 120px; flex-shrink: 0; border-radius: var(--radius-md); overflow: hidden; }
.cart-item-image img { width: 100%; height: 100%; object-fit: cover; }

.cart-item-details { flex: 1; display: flex; flex-direction: column; justify-content: space-between; }
.cart-item-title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: var(--font-semibold); color: var(--text-primary); margin-bottom: var(--space-1); }
.cart-item-author { font-size: var(--text-sm); color: var(--text-muted); }
.cart-item-price { font-size: var(--text-xl); font-weight: var(--font-bold); color: var(--gold-primary); }
.cart-item-actions { display: flex; align-items: center; gap: var(--space-4); }

.cart-item-remove { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: var(--space-2); transition: color var(--transition-fast); }
.cart-item-remove:hover { color: var(--error); }

.cart-summary {
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: sticky;
  top: 100px;
}

.cart-summary-title { font-family: var(--font-display); font-size: var(--text-xl); margin-bottom: var(--space-6); }
.cart-summary-row { display: flex; justify-content: space-between; margin-bottom: var(--space-3); font-size: var(--text-sm); }
.cart-summary-row.total { font-size: var(--text-xl); font-weight: var(--font-bold); color: var(--gold-primary); border-top: 1px solid var(--border-dark); padding-top: var(--space-4); margin-top: var(--space-4); }

/* ============================================
   TABLES
   ============================================ */
.table-container { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border-dark); }

.table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.table thead { background: var(--bg-light); }
.table th {
  text-align: left;
  padding: var(--space-4);
  font-weight: var(--font-semibold);
  color: var(--gold-primary);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-gold);
}

.table td { padding: var(--space-4); color: var(--text-secondary); border-bottom: 1px solid var(--border-dark); }
.table tbody tr { transition: background var(--transition-fast); }
.table tbody tr:hover { background: rgba(255, 215, 0, 0.02); }
.table tbody tr:last-child td { border-bottom: none; }

.table-striped tbody tr:nth-child(even) { background: var(--bg-dark); }
.table-compact th, .table-compact td { padding: var(--space-2) var(--space-4); }

/* ============================================
   FLASH MESSAGES
   ============================================ */
.flash-message {
  position: fixed;
  top: 90px;
  right: var(--space-4);
  z-index: var(--z-popover);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.3s ease;
  max-width: 400px;
}

.flash-success { background: rgba(34, 197, 94, 0.15); border: 1px solid rgba(34, 197, 94, 0.3); color: var(--success); }
.flash-error { background: rgba(239, 68, 68, 0.15); border: 1px solid rgba(239, 68, 68, 0.3); color: var(--error); }
.flash-warning { background: rgba(245, 158, 11, 0.15); border: 1px solid rgba(245, 158, 11, 0.3); color: var(--warning); }
.flash-info { background: rgba(59, 130, 246, 0.15); border: 1px solid rgba(59, 130, 246, 0.3); color: var(--info); }

.flash-content { display: flex; align-items: center; gap: var(--space-2); flex: 1; }
.flash-close { background: none; border: none; color: currentColor; cursor: pointer; padding: var(--space-1); opacity: 0.7; transition: opacity var(--transition-fast); }
.flash-close:hover { opacity: 1; }