:root {
  --bg-base: #0a0a0f;
  --bg-surface: #12121a;
  --bg-elevated: #1a1a24;
  --bg-hover: #22222e;
  --bg-header: rgba(10, 10, 15, 0.85);
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --accent: #00ff88;
  --accent-2: #06b6d4;
  --accent-glow: rgba(0, 255, 136, 0.15);
  --status-live: #ff3b5c;
  --status-upcoming: #ffb800;
  --status-finished: #00ff88;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
  --bg-base: #f5f5f7;
  --bg-surface: #ffffff;
  --bg-elevated: #fafafa;
  --bg-hover: #f0f0f3;
  --bg-header: rgba(255, 255, 255, 0.85);
  --text-primary: #0a0a0f;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);
  --accent: #00b368;
  --accent-2: #0891b2;
  --accent-glow: rgba(0, 179, 104, 0.1);
  --status-live: #dc2626;
  --status-upcoming: #d97706;
  --status-finished: #059669;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 20%, var(--accent-glow) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-2); }

/* Header */
header {
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}

header.scrolled {
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  object-fit: contain;
}

.logo:hover { transform: rotate(360deg) scale(1.1); }

.brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

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

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  flex: 1;
  justify-content: flex-end;
}

.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 180px;
  max-width: 320px;
}

.search-wrapper .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.875rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.625rem 2.5rem 0.625rem 2.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.clear-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.filter-buttons {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8125rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.filter-btn.active {
  background: var(--accent);
  color: var(--bg-base);
  border-color: var(--accent);
  box-shadow: 0 4px 16px var(--accent-glow);
}

[data-theme="light"] .filter-btn.active { color: #ffffff; }

.header-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.theme-toggle, .back-link {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8125rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  white-space: nowrap;
}

.theme-toggle:hover, .back-link:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  transform: translateY(-1px);
}

/* Main Container */
.main-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
  flex: 1;
  width: 100%;
  position: relative;
  z-index: 1;
}

/* Hero */
.hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
  margin-bottom: 1rem;
  animation: slideIn 0.6s ease-out;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Category Section */
.category-section {
  margin-bottom: 3rem;
  animation: slideIn 0.6s ease-out;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.category-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.category-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  padding: 0 0.5rem;
  background: var(--bg-elevated);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-display);
}

/* Grid Container */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

/* Cards */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  overflow: hidden;
  cursor: pointer;
  min-height: 200px;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-color, var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--bg-elevated);
}

.card:hover::before { transform: scaleX(1); }
.card:hover h3 { color: var(--card-color, var(--accent)); }
.card:hover .icon { transform: scale(1.1) translateX(4px); }

.card.card-custom:hover {
  box-shadow: 
    0 20px 40px -10px color-mix(in srgb, var(--card-color) 30%, transparent),
    0 0 0 1px color-mix(in srgb, var(--card-color) 40%, transparent);
}

/* Status Dot - USA EL COLOR DE CADA TARJETA */
.status-dot {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  z-index: 2;
  transition: var(--transition);
}

.status-dot.live {
  background: var(--card-color, var(--status-live));
  box-shadow: 
    0 0 0 3px color-mix(in srgb, var(--card-color, var(--status-live)) 20%, transparent),
    0 0 12px var(--card-color, var(--status-live));
  animation: ledPulse 1.5s infinite;
}

.status-dot.upcoming {
  background: var(--card-color, var(--status-upcoming));
  box-shadow: 
    0 0 0 3px color-mix(in srgb, var(--card-color, var(--status-upcoming)) 20%, transparent),
    0 0 8px var(--card-color, var(--status-upcoming));
}

.status-dot.finished {
  background: var(--card-color, var(--status-finished));
  box-shadow: 
    0 0 0 3px color-mix(in srgb, var(--card-color, var(--status-finished)) 15%, transparent),
    0 0 8px var(--card-color, var(--status-finished));
}

@keyframes ledPulse {
  0%, 100% {
    box-shadow: 
      0 0 0 3px color-mix(in srgb, var(--card-color, var(--status-live)) 20%, transparent),
      0 0 12px var(--card-color, var(--status-live));
  }
  50% {
    box-shadow: 
      0 0 0 6px color-mix(in srgb, var(--card-color, var(--status-live)) 0%, transparent),
      0 0 16px var(--card-color, var(--status-live));
  }
}

/* Category Pill */
.category-pill {
  display: inline-block;
  padding: 0.2rem 0.625rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.625rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  align-self: flex-start;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-display);
  color: var(--text-secondary);
}

.tag-robotica { color: var(--accent-2); border-color: rgba(6, 182, 212, 0.3); }
.tag-clasico { color: var(--accent); border-color: rgba(0, 255, 136, 0.3); }

.card .icon {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
  line-height: 1;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
  transition: var(--transition);
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
  transition: var(--transition);
}

.card .card-subtitle {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.badge-info {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: auto;
  align-self: flex-start;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Hidden State */
.card.hidden, .category-section.hidden { display: none !important; }

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 1.5rem;
  color: var(--text-muted);
  display: none;
  animation: slideIn 0.4s ease-out;
}

.empty-state.visible { display: block; }

.empty-state .empty-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.empty-state p { font-size: 1rem; font-weight: 500; color: var(--text-secondary); }
.empty-hint { font-size: 0.875rem !important; margin-top: 0.5rem; color: var(--text-muted) !important; }

/* Footer */
footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: auto;
  position: relative;
  z-index: 1;
}

footer strong {
  color: var(--accent);
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}

/* Accesibilidad */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Responsive */
@media (max-width: 992px) {
  .header-inner { flex-direction: column; align-items: stretch; gap: 1rem; }
  .header-brand { justify-content: center; }
  .header-controls { flex-direction: column; align-items: stretch; }
  .search-wrapper { max-width: 100%; }
  .filter-buttons { justify-content: center; }
  .header-actions { justify-content: center; }
}

@media (max-width: 768px) {
  header { padding: 1rem; }
  .main-container { padding: 1rem; }
  .hero { padding: 2rem 1rem 1rem; }
  .grid-container { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
}

@media (max-width: 480px) {
  .grid-container { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .filter-btn { flex: 1; min-width: 0; text-align: center; }
  .theme-toggle, .back-link { flex: 1; justify-content: center; }
}

@media (max-width: 380px) {
  .grid-container { grid-template-columns: 1fr; }
}