:root {
  --accent: #e10600;
  --muted: #aab3c6;
  --text: #f4f7fb;
  --card-bg: rgba(6, 8, 15, 0.55);
  --gradient-primary: linear-gradient(90deg, #0b3b6e, #e10600);
}

/* CIRCUITS PAGE STYLES */
.circuits-main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* Hero Section */
.circuits-hero {
  background: linear-gradient(135deg, rgba(225, 6, 0, 0.1) 0%, rgba(0, 0, 0, 0.3) 100%);
  border-radius: 24px;
  padding: 60px 40px;
  margin-bottom: 60px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.circuits-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><path d="M10,50 Q30,20 50,50 T90,50" stroke="rgba(225,6,0,0.1)" fill="none" stroke-width="0.5"/></svg>');
  opacity: 0.3;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.circuits-hero h1 {
  font-size: 3rem;
  margin-bottom: 16px;
  font-weight: 900;
  color: #e10600;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.circuits-hero p {
  color: var(--muted);
  font-size: 1.2rem;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.stat-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

/* World Circuits Section */
.world-circuits-section {
  margin-bottom: 40px;
}

.world-circuits-section h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 40px;
  color: var(--accent);
  font-weight: 900;
}

/* Regional Overview */
.regional-overview {
  margin-bottom: 60px;
}

.region-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* REGION CARD */
.region-card {
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  cursor: pointer;
  background: var(--card-bg);
  border: 2px solid rgba(255, 255, 255, 0.06);
  position: relative;
  height: 320px;
  display: flex;
  flex-direction: column;
}

.region-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(225, 6, 0, 0.18);
}

.region-image {
  position: relative;
  width: 100%;
  height: 78%;
  overflow: hidden;
  background: #0a0a0a;
  display: block;
}

.region-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s cubic-bezier(.2, .9, .2, 1), filter 0.35s ease;
  filter: brightness(65%) contrast(105%);
}

.region-card:hover .region-image img {
  transform: scale(1.08);
  filter: brightness(78%) contrast(108%);
}

.region-image::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  background: linear-gradient(to top, rgba(2, 6, 12, 0.65), rgba(2, 6, 12, 0.15) 40%, rgba(2, 6, 12, 0));
  pointer-events: none;
}

.region-overlay-text {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 12px;
  color: #fff;
  z-index: 3;
  text-align: left;
}

.region-overlay-text h3 {
  margin: 0 0 6px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text);
  text-shadow: 0 6px 18px rgba(0, 0, 0, 0.55);
}

.region-overlay-text .region-count {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
  background: rgba(255, 255, 255, 0.03);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.region-overlay-text .region-list {
  --lines: 2;
  margin-top: 8px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.25;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  max-height: calc(var(--lines) * 1.25em);
  position: relative;
}

.region-overlay-text .region-list::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1em;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.6));
  pointer-events: none;
}

.region-card .region-meta {
  padding: 12px 16px;
  height: 22%;
  display: flex;
  align-items: center;
  gap: 12px;
  background: transparent;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
}

/* Controls Section */
.circuits-controls {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 32px;
  margin-bottom: 40px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Search Bar */
.search-bar {
  margin-bottom: 24px;
}

#circuit-search {
  width: 100%;
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: var(--text);
  font-size: 1rem;
  transition: all 0.3s ease;
}

#circuit-search:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 0, 0, 0.5);
  box-shadow: 0 0 20px rgba(225, 6, 0, 0.3);
}

#circuit-search::placeholder {
  color: var(--muted);
}

/* Filter Buttons */
.filter-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.filter-btn {
  padding: 10px 24px;
  border-radius: 25px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: whitesmoke;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.filter-btn:hover {
  border-color: var(--accent);
  background: rgba(225, 6, 0, 0.1);
  transform: translateY(-2px);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* Sort Options */
.sort-options {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sort-options label {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
}

#sort-select {
  padding: 10px 16px;
  background: rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

#sort-select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Loading State */
.loading {
  text-align: center;
  padding: 80px 20px;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(225, 6, 0, 0.1);
  border-top: 4px solid var(--accent);
  border-radius: 50%;
  margin: 0 auto 20px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Circuits Grid */
.circuits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

/* Circuit Card */
.circuit-card {
  background: var(--card-bg);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  position: relative;
  cursor: pointer;
  opacity: 0;
  animation: fadeIn 0.5s ease forwards;
}

.circuit-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(225, 6, 0, 0.3);
  border-color: var(--accent);
}

.circuit-card.hidden {
  display: none;
}

.circuit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(225, 6, 0, 0.1), transparent);
  transition: left 0.5s ease;
  pointer-events: none;
  z-index: 1;
}

.circuit-card:hover::before {
  left: 100%;
}

/* Circuit Image */
.circuit-image {
  width: 100%;
  height: 200px;
  position: relative;
  overflow: hidden;
}

.circuit-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.circuit-card:hover .circuit-image img {
  transform: scale(1.1);
}

/* Circuit Type Badge */
.circuit-type {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 6px 14px;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  z-index: 2;
}

.circuit-type.street {
  color: #ffd700;
  border: 1px solid #ffd700;
}

.circuit-type.permanent {
  color: #00d4ff;
  border: 1px solid #00d4ff;
}

.circuit-type.classic {
  color: #ff4757;
  border: 1px solid #ff4757;
}

/* Circuit Content */
.circuit-content {
  padding: 24px;
}

.circuit-header {
  margin-bottom: 16px;
}

.circuit-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.circuit-location {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.circuit-location::before {
  content: '📍';
}

/* Circuit Info Grid */
.circuit-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.info-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.info-item:hover {
  background: rgba(225, 6, 0, 0.05);
  border-color: var(--accent);
  transform: scale(1.05);
}

.info-label {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
  display: block;
}

.info-value {
  color: var(--text);
  font-weight: 700;
  font-size: 1rem;
}

/* Circuit Description */
.circuit-description {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Circuits Facts */
.circuit-facts {
  color: #fff;
  padding: 60px 20px;
  text-align: center;
}

.circuit-facts h2 {
  font-size: 2.5rem;
  color: red;
  margin-bottom: 40px;
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 25px;
}

.fact-card {
  position: relative;
  height: 250px;
  border-radius: 15px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  text-align: left;
  background-size: cover;
  background-position: center;
  color: #fff;
}

.fact-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  transition: background 0.3s ease;
  z-index: 0;
}

.fact-card:hover::before {
  background: rgba(0, 0, 0, 0.148);
  cursor: pointer;
}

.fact-card h3,
.fact-card p {
  position: relative;
  z-index: 1;
  text-align: center;
}

.fact-highlight {
  font-size: 1.3rem;
  font-weight: bold;
  color: #ffd700;
}

.fact-detail {
  opacity: 0.9;
  font-size: 0.95rem;
  text-align: center;
}

.fact-card.monza {
  background-image: url('../images/circuits/monza.jpg');
}

.fact-card.spa {
  background-image: url('../images/circuits/belgian.avif');
}

.fact-card.singapore {
  background-image: url('../images/circuits/singapore.jpg');
}

.fact-card.monaco {
  background-image: url('../images/circuits//madrid.avif');
}

/* Loading animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.circuit-card:nth-child(1) { animation-delay: 0.1s; }
.circuit-card:nth-child(2) { animation-delay: 0.2s; }
.circuit-card:nth-child(3) { animation-delay: 0.3s; }
.circuit-card:nth-child(4) { animation-delay: 0.4s; }
.circuit-card:nth-child(5) { animation-delay: 0.5s; }
.circuit-card:nth-child(6) { animation-delay: 0.6s; }

/* Responsive Design */
@media (max-width: 968px) {
  .circuits-hero h1 {
    font-size: 2.2rem;
  }
  .region-cards-grid {
    grid-template-columns: 1fr;
  }
  .circuits-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
  }
  .filter-buttons {
    justify-content: center;
  }
  .sort-options {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .circuits-hero {
    padding: 40px 24px;
  }
  .circuits-hero h1 {
    font-size: 1.8rem;
  }
  .stat-num {
    font-size: 2rem;
  }
  .circuits-controls {
    padding: 20px;
  }
  .circuit-info {
    grid-template-columns: 1fr;
  }
  .facts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .circuits-hero {
    padding: 30px 16px;
  }
  .hero-stats {
    gap: 20px;
  }
  .stat-num {
    font-size: 1.8rem;
  }
  .circuit-name {
    font-size: 1.2rem;
  }
  .filter-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }
}

/* Accessibility focus states */
.circuit-card:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.filter-btn:focus,
#circuit-search:focus,
#sort-select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}