/* ============================================
   卡丁车赛事资讯平台 - F1赛车风格 CSS
   设计: A1首页全屏视频 + A3杂志风卡片
   ============================================ */

/* ===== CSS VARIABLES - F1配色系统 ===== */
:root {
  /* 核心赛车色 */
  --racing-red: #E8002D;
  --racing-red-light: #FF1A44;
  --racing-red-dim: #9B001E;
  --flame-orange: #FF6B00;
  --gold-accent: #FFD700;
  
  /* 背景色 */
  --asphalt-black: #0A0A0A;
  --carbon-dark: #0D0D0D;
  --card-dark: #121212;
  --card-hover: #1A1A1A;
  --border-gray: #2A2A2A;
  
  /* 文字色 */
  --text-white: #FFFFFF;
  --text-light: #F0F0F0;
  --text-muted: #888888;
  --text-dim: #555555;
  
  /* 状态色 */
  --status-green: #00C853;
  --status-gold: #FFB300;
  
  /* 圆角 */
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.5);
  --shadow-red-glow: 0 8px 32px rgba(232,0,45,0.3);
  --shadow-card-hover: 0 12px 40px rgba(232,0,45,0.2);
  
  /* 动画 */
  --transition-fast: all 0.2s cubic-bezier(0.4,0,0.2,1);
  --transition-smooth: all 0.35s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--asphalt-black);
  color: var(--text-light);
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== SCROLLBAR - 赛车风格 ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--carbon-dark); }
::-webkit-scrollbar-thumb { 
  background: linear-gradient(180deg, var(--racing-red), var(--racing-red-dim));
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--racing-red-light); }

/* ===== CARBON FIBER PATTERN ===== */
.carbon-bg {
  background-image: 
    linear-gradient(27deg, #151515 5px, transparent 5px),
    linear-gradient(207deg, #151515 5px, transparent 5px),
    linear-gradient(27deg, #1a1a1a 5px, transparent 5px),
    linear-gradient(207deg, #1a1a1a 5px, transparent 5px),
    linear-gradient(90deg, #1a1a1a 10px, transparent 10px),
    linear-gradient(#1a1a1a 25%, #141414 25%, #141414 50%, transparent 50%, transparent 75%, #111 75%);
  background-size: 20px 20px;
  background-color: var(--carbon-dark);
}

/* ===== CHECKERED FLAG PATTERN ===== */
.checkered-border {
  position: relative;
}
.checkered-border::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--text-white) 0px,
    var(--text-white) 16px,
    var(--asphalt-black) 16px,
    var(--asphalt-black) 32px
  );
}

/* ===== HEADER - 玻璃态导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-gray);
}

.header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--racing-red), transparent);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-red-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%);
  animation: logoShine 3s ease-in-out infinite;
}

@keyframes logoShine {
  0%, 100% { transform: translateX(-100%) rotate(45deg); }
  50% { transform: translateX(100%) rotate(45deg); }
}

.logo-text {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(90deg, var(--text-white) 0%, var(--racing-red-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--card-dark);
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--border-gray);
  letter-spacing: 1px;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-size: 14px;
  color: var(--text-muted);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav-link:hover {
  color: var(--text-white);
  background: rgba(232,0,45,0.1);
}

.nav-link.active {
  color: var(--text-white);
  background: linear-gradient(135deg, rgba(232,0,45,0.2), rgba(155,0,30,0.2));
  border: 1px solid rgba(232,0,45,0.3);
}

/* Admin Button - 渐变红 */
.admin-btn {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim)) !important;
  color: var(--text-white) !important;
  font-weight: 700 !important;
  border: none !important;
  box-shadow: var(--shadow-red-glow);
  position: relative;
  overflow: hidden;
}

.admin-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.admin-btn:hover::before {
  left: 100%;
}

.admin-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(232,0,45,0.5);
}

/* ===== HERO SECTION - A1全屏视频风格 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}

/* Hero Background */
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.4) contrast(1.1);
}

/* Gradient Overlay */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at center, transparent 0%, var(--asphalt-black) 70%),
    linear-gradient(180deg, rgba(10,10,10,0.8) 0%, rgba(10,10,10,0.3) 50%, var(--asphalt-black) 100%);
}

/* Speed Lines Animation */
.speed-lines {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  pointer-events: none;
}

.speed-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--racing-red-light), transparent);
  opacity: 0.3;
  animation: speedLine 2s linear infinite;
}

.speed-line:nth-child(1) { top: 20%; width: 200px; animation-delay: 0s; }
.speed-line:nth-child(2) { top: 35%; width: 150px; animation-delay: 0.3s; }
.speed-line:nth-child(3) { top: 50%; width: 180px; animation-delay: 0.6s; }
.speed-line:nth-child(4) { top: 65%; width: 120px; animation-delay: 0.9s; }
.speed-line:nth-child(5) { top: 80%; width: 160px; animation-delay: 1.2s; }

@keyframes speedLine {
  0% { left: -200px; opacity: 0; }
  20% { opacity: 0.4; }
  80% { opacity: 0.4; }
  100% { left: 100%; opacity: 0; }
}

/* Top Racing Stripes */
.racing-stripe-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--racing-red) 0px,
    var(--racing-red) 40px,
    var(--text-white) 40px,
    var(--text-white) 80px
  );
}

/* Bottom Racing Stripes */
.racing-stripe-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--text-white) 0px,
    var(--text-white) 40px,
    var(--racing-red) 40px,
    var(--racing-red) 80px
  );
}

/* Hero Content */
.hero-inner {
  position: relative;
  z-index: 10;
  max-width: 900px;
  text-align: center;
}

/* Title */
.hero-title {
  font-size: clamp(36px, 8vw, 72px);
  font-weight: 900;
  letter-spacing: 4px;
  line-height: 1.1;
  margin-bottom: 20px;
  
  background: linear-gradient(135deg, var(--text-white) 0%, var(--racing-red-light) 50%, var(--flame-orange) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  
  text-shadow: 0 0 60px rgba(232,0,45,0.3);
  animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
  0% { filter: drop-shadow(0 0 20px rgba(232,0,45,0.3)); }
  100% { filter: drop-shadow(0 0 40px rgba(232,0,45,0.5)); }
}

.hero-sub {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 40px;
  letter-spacing: 2px;
  font-weight: 500;
}

/* Racing Flag Decorations */
.flag-decor {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}

.flag-icon {
  font-size: 24px;
}

.flag-line {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--racing-red), transparent);
}

/* Search Bar - 赛车风格 */
.search-bar {
  display: flex;
  align-items: center;
  background: rgba(18,18,18,0.9);
  border: 2px solid var(--border-gray);
  border-radius: 50px;
  padding: 0 8px 0 24px;
  height: 56px;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
  transition: var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.search-bar:focus-within {
  border-color: var(--racing-red);
  box-shadow: 0 0 0 4px rgba(232,0,45,0.15), var(--shadow-red-glow);
}

.search-icon {
  font-size: 18px;
  color: var(--racing-red);
}

.search-bar input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-white);
  font-size: 16px;
  font-weight: 500;
}

.search-bar input::placeholder {
  color: var(--text-dim);
}

.search-btn {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  border: none;
  color: var(--text-white);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
  letter-spacing: 1px;
}

.search-btn:hover {
  background: linear-gradient(135deg, var(--racing-red-light), var(--racing-red));
  transform: scale(1.02);
}

.search-clear {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 16px;
  padding: 8px;
  transition: var(--transition-fast);
}

.search-clear:hover {
  color: var(--racing-red);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 50px;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 36px;
  font-weight: 900;
  color: var(--text-white);
  background: linear-gradient(135deg, var(--text-white), var(--racing-red-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 2px;
  margin-top: 4px;
  text-transform: uppercase;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 11px;
  letter-spacing: 2px;
  animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--racing-red);
  border-bottom: 2px solid var(--racing-red);
  transform: rotate(45deg);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== FILTER BAR - 城市筛选 ===== */
.filter-bar {
  background: var(--carbon-dark);
  border-bottom: 1px solid var(--border-gray);
  position: sticky;
  top: 70px;
  z-index: 100;
  overflow-x: auto;
}

.filter-bar::-webkit-scrollbar { height: 0; }

.filter-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  gap: 10px;
  white-space: nowrap;
}

.filter-btn {
  background: var(--card-dark);
  border: 1px solid var(--border-gray);
  color: var(--text-muted);
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.filter-btn:hover {
  border-color: var(--racing-red-dim);
  color: var(--text-light);
  background: rgba(232,0,45,0.1);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  border-color: var(--racing-red);
  color: var(--text-white);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(232,0,45,0.3);
}

/* ===== STATS BAR ===== */
.stats-bar {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.stats-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.stats-divider {
  color: var(--border-gray);
}

.stats-tag {
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.stats-tag.upcoming {
  background: rgba(255,179,0,0.15);
  color: var(--status-gold);
  border: 1px solid rgba(255,179,0,0.3);
}

.stats-tag.open {
  background: rgba(0,200,83,0.12);
  color: var(--status-green);
  border: 1px solid rgba(0,200,83,0.25);
}

.stats-tag.ended {
  background: rgba(85,85,85,0.15);
  color: var(--text-dim);
  border: 1px solid var(--border-gray);
}

/* ===== MAIN / WATERFALL - A3杂志风 ===== */
.main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.waterfall {
  columns: 4 260px;
  column-gap: 20px;
  padding-top: 24px;
}

/* ===== RACE CARD - 杂志风 ===== */
.race-card {
  break-inside: avoid;
  background: var(--card-dark);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
  cursor: pointer;
  transition: var(--transition-smooth);
  animation: fadeUp 0.5s ease both;
  position: relative;
}

/* Checker flag corner decoration */
.race-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, transparent 50%, var(--racing-red) 50%);
  opacity: 0;
  transition: var(--transition-fast);
  z-index: 2;
}

.race-card:hover {
  background: var(--card-hover);
  border-color: var(--racing-red-dim);
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-card-hover);
}

.race-card:hover::before {
  opacity: 1;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Card Cover */
.card-cover {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: linear-gradient(135deg, #1a0008 0%, var(--asphalt-black) 100%);
}

.card-cover-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #1a0008 0%, #0e0e0e 50%, #140a00 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  position: relative;
  overflow: hidden;
}

/* Racing texture overlay */
.card-cover-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 10px,
      rgba(232,0,45,0.03) 10px,
      rgba(232,0,45,0.03) 20px
    );
}

.cover-icon {
  font-size: 48px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.5));
}

.cover-city-big {
  font-size: 14px;
  font-weight: 800;
  color: rgba(255,255,255,0.25);
  letter-spacing: 4px;
  position: relative;
  z-index: 1;
  text-transform: uppercase;
}

/* Status Badge */
.card-status-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 800;
  z-index: 5;
  backdrop-filter: blur(8px);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.badge-open {
  background: linear-gradient(135deg, var(--status-green), #00a854);
  color: var(--text-white);
  box-shadow: 0 4px 12px rgba(0,200,83,0.4);
}

.badge-upcoming {
  background: linear-gradient(135deg, var(--status-gold), #ff8c00);
  color: var(--asphalt-black);
  box-shadow: 0 4px 12px rgba(255,179,0,0.4);
}

.badge-ended {
  background: rgba(60,60,60,0.9);
  color: var(--text-dim);
}

/* Card Body - 杂志风 */
.card-body {
  padding: 18px 18px 16px;
  position: relative;
}

/* Red accent line */
.card-body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 18px;
  right: 18px;
  height: 2px;
  background: linear-gradient(90deg, var(--racing-red), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}

.race-card:hover .card-body::before {
  opacity: 1;
}

.card-city-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.card-city {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.card-category {
  background: var(--carbon-dark);
  color: var(--text-muted);
  border: 1px solid var(--border-gray);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.card-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  letter-spacing: 0.5px;
}

.card-venue {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-venue::before {
  content: '📍';
  font-size: 12px;
}

.card-meta {
  border-top: 1px solid var(--border-gray);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.card-meta-icon {
  font-size: 14px;
  flex-shrink: 0;
  color: var(--racing-red);
}

.card-fee {
  font-size: 20px;
  font-weight: 900;
  color: var(--racing-red-light);
}

.card-fee-free {
  color: var(--status-green);
}

/* Source Tags */
.card-source {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  margin-top: 12px;
  font-weight: 600;
}

.source-weixin {
  background: rgba(7,193,96,0.12);
  color: #07c160;
  border: 1px solid rgba(7,193,96,0.2);
}

.source-xiaohongshu {
  background: rgba(255,69,80,0.12);
  color: #ff4550;
  border: 1px solid rgba(255,69,80,0.2);
}

.source-weibo {
  background: rgba(230,22,45,0.12);
  color: #e6162d;
  border: 1px solid rgba(230,22,45,0.2);
}

.source-official {
  background: rgba(100,149,237,0.12);
  color: #6495ed;
  border: 1px solid rgba(100,149,237,0.2);
}

.source-manual {
  background: rgba(136,136,136,0.12);
  color: #888;
  border: 1px solid rgba(136,136,136,0.2);
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 100px 24px;
  color: var(--text-dim);
}

.empty-icon {
  font-size: 72px;
  margin-bottom: 24px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.empty-state a {
  color: var(--racing-red-light);
  text-decoration: underline;
  font-weight: 600;
}

/* ===== MODAL - 详情弹窗 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.open {
  display: flex;
}

.modal {
  background: var(--card-dark);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: modalIn 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(30px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Modal top accent */
.modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--racing-red), var(--flame-orange), var(--racing-red));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--carbon-dark);
  border: 1px solid var(--border-gray);
  color: var(--text-muted);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  z-index: 10;
}

.modal-close:hover {
  background: var(--racing-red);
  color: var(--text-white);
  border-color: var(--racing-red);
}

.modal-header {
  padding: 32px 32px 24px;
  background: linear-gradient(160deg, rgba(232,0,45,0.08) 0%, var(--card-dark) 100%);
  border-bottom: 1px solid var(--border-gray);
}

.modal-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.modal-city {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.modal-status {
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.modal-status.open {
  background: rgba(0,200,83,0.15);
  color: var(--status-green);
}

.modal-status.upcoming {
  background: rgba(255,179,0,0.15);
  color: var(--status-gold);
}

.modal-status.ended {
  background: rgba(85,85,85,0.2);
  color: var(--text-dim);
}

.modal-title {
  font-size: 24px;
  font-weight: 900;
  margin-bottom: 10px;
  line-height: 1.3;
  letter-spacing: 0.5px;
}

.modal-venue {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.modal-venue::before {
  content: '📍';
}

.modal-body {
  padding: 24px 32px;
}

.modal-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.modal-info-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.modal-info-item.full {
  grid-column: 1 / -1;
}

.minfo-label {
  font-size: 11px;
  color: var(--text-dim);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.minfo-val {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.5;
}

.minfo-val.fee {
  font-size: 28px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--racing-red-light), var(--flame-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.modal-contact,
.modal-source {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 16px;
  background: var(--carbon-dark);
  border-radius: var(--radius-sm);
  margin-top: 12px;
}

.modal-footer {
  padding: 20px 32px 32px;
  border-top: 1px solid var(--border-gray);
  display: flex;
  gap: 16px;
}

.modal-btn-share,
.modal-btn-reg {
  flex: 1;
  padding: 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  letter-spacing: 1px;
}

.modal-btn-share {
  background: var(--carbon-dark);
  color: var(--text-light);
  border: 1px solid var(--border-gray);
}

.modal-btn-share:hover {
  border-color: var(--racing-red-dim);
  background: rgba(232,0,45,0.1);
}

.modal-btn-reg {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  box-shadow: var(--shadow-red-glow);
}

.modal-btn-reg:hover {
  background: linear-gradient(135deg, var(--racing-red-light), var(--racing-red));
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(232,0,45,0.5);
}

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  z-index: 999;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  border: none;
  font-size: 20px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-red-glow);
  transition: var(--transition-fast);
}

.back-to-top.show {
  display: flex;
}

.back-to-top:hover {
  background: linear-gradient(135deg, var(--racing-red-light), var(--racing-red));
  transform: translateY(-4px) scale(1.05);
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 13px;
  color: var(--text-dim);
  border-top: 1px solid var(--border-gray);
  background: var(--carbon-dark);
}

.footer p {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .waterfall {
    columns: 3 220px;
  }
}

@media (max-width: 800px) {
  .waterfall {
    columns: 2 160px;
    column-gap: 16px;
  }
  
  .hero-title {
    letter-spacing: 2px;
  }
  
  .hero-stats {
    gap: 24px;
  }
  
  .stat-value {
    font-size: 28px;
  }
  
  .modal-info-grid {
    grid-template-columns: 1fr;
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 20px;
    padding-right: 20px;
  }
  
  .back-to-top {
    bottom: 24px;
    right: 24px;
    width: 46px;
    height: 46px;
  }
}

@media (max-width: 500px) {
  .waterfall {
    columns: 1;
  }
  
  .header-inner {
    padding: 0 16px;
    height: 60px;
  }
  
  .logo-text {
    font-size: 18px;
  }
  
  .logo-sub {
    display: none;
  }
  
  .hero {
    padding: 100px 16px 60px;
  }
  
  .search-bar {
    height: 50px;
    padding: 0 6px 0 16px;
  }
  
  .search-btn {
    padding: 10px 20px;
    font-size: 13px;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
  
  .card-body {
    padding: 14px;
  }
  
  .card-title {
    font-size: 14px;
  }
}

/* ===== ADMIN PAGE STYLES ===== */
.admin-layout {
  max-width: 1000px;
  margin: 100px auto 60px;
  padding: 0 24px;
}

.admin-header {
  margin-bottom: 40px;
}

.admin-header h1 {
  font-size: 28px;
  font-weight: 900;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-white), var(--racing-red-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.admin-header p {
  font-size: 14px;
  color: var(--text-muted);
}

.admin-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition-fast);
  letter-spacing: 0.5px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  box-shadow: var(--shadow-red-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--racing-red-light), var(--racing-red));
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--card-dark);
  color: var(--text-light);
  border: 1px solid var(--border-gray) !important;
}

.btn-secondary:hover {
  border-color: var(--racing-red-dim) !important;
  background: rgba(232,0,45,0.1);
}

.btn-danger {
  background: rgba(232,0,45,0.12);
  color: var(--racing-red-light);
  border: 1px solid rgba(232,0,45,0.25) !important;
}

.btn-danger:hover {
  background: var(--racing-red);
  color: var(--text-white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 12px;
}

/* Form Modal */
.form-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(10px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}

.form-overlay.open {
  display: flex;
}

.form-modal {
  background: var(--card-dark);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  padding: 36px;
  animation: modalIn 0.35s cubic-bezier(0.34,1.56,0.64,1);
  margin: auto;
  position: relative;
}

.form-modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--racing-red), var(--flame-orange), var(--racing-red));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.form-modal h2 {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 28px;
  background: linear-gradient(135deg, var(--text-white), var(--racing-red-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--carbon-dark);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-sm);
  color: var(--text-light);
  padding: 14px 16px;
  font-size: 14px;
  outline: none;
  transition: var(--transition-fast);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--racing-red);
  box-shadow: 0 0 0 3px rgba(232,0,45,0.12);
}

.form-group select option {
  background: var(--card-dark);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 32px;
}

/* Admin Table */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.admin-table th {
  background: linear-gradient(135deg, var(--carbon-dark), var(--card-dark));
  padding: 16px;
  text-align: left;
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-bottom: 2px solid var(--racing-red-dim);
}

.admin-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border-gray);
  font-size: 14px;
  vertical-align: middle;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background: rgba(232,0,45,0.05);
}

.admin-table-city {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.admin-table-status {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.admin-table-status.open {
  background: rgba(0,200,83,0.15);
  color: var(--status-green);
}

.admin-table-status.upcoming {
  background: rgba(255,179,0,0.15);
  color: var(--status-gold);
}

.admin-table-status.ended {
  background: rgba(85,85,85,0.15);
  color: var(--text-dim);
}

/* Import Tabs */
.import-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-gray);
  padding-bottom: 16px;
}

.import-tab {
  background: var(--card-dark);
  border: 1px solid var(--border-gray);
  color: var(--text-muted);
  padding: 10px 24px;
  border-radius: 30px;
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-weight: 600;
}

.import-tab:hover {
  border-color: var(--racing-red-dim);
  color: var(--text-light);
}

.import-tab.active {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  border-color: var(--racing-red);
  color: var(--text-white);
  box-shadow: var(--shadow-red-glow);
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--border-gray);
  border-radius: var(--radius-lg);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  overflow: hidden;
  position: relative;
  background: var(--carbon-dark);
}

.upload-zone:hover {
  border-color: var(--racing-red);
  background: rgba(232,0,45,0.04);
}

.upload-zone.drag-over {
  border-color: var(--racing-red);
  background: rgba(232,0,45,0.08);
}

.upload-placeholder {
  text-align: center;
  pointer-events: none;
  color: var(--text-muted);
  padding: 40px;
}

.upload-preview {
  width: 100%;
  position: relative;
}

.upload-preview img {
  width: 100%;
  max-height: 360px;
  object-fit: contain;
  display: block;
  background: var(--asphalt-black);
}

.upload-remove {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0,0,0,0.8);
  color: var(--text-white);
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 12px;
  transition: var(--transition-fast);
}

.upload-remove:hover {
  background: var(--racing-red);
}

/* Status Messages */
.import-status {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: block;
  margin: 16px 0;
}

.import-status.loading {
  background: rgba(255,179,0,0.1);
  color: var(--status-gold);
  border: 1px solid rgba(255,179,0,0.25);
}

.import-status.success {
  background: rgba(0,200,83,0.1);
  color: var(--status-green);
  border: 1px solid rgba(0,200,83,0.25);
}

.import-status.error {
  background: rgba(232,0,45,0.1);
  color: var(--racing-red-light);
  border: 1px solid rgba(232,0,45,0.25);
}

.import-status.warn {
  background: rgba(255,179,0,0.08);
  color: var(--status-gold);
  border: 1px solid rgba(255,179,0,0.2);
}

/* Detect Banner */
.detect-banner {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.detect-banner.pass {
  background: rgba(0,200,83,0.1);
  border: 1px solid rgba(0,200,83,0.3);
  color: var(--status-green);
}

.detect-banner.warn {
  background: rgba(255,179,0,0.1);
  border: 1px solid rgba(255,179,0,0.3);
  color: var(--status-gold);
}

.detect-banner.fail {
  background: rgba(232,0,45,0.1);
  border: 1px solid rgba(232,0,45,0.3);
  color: var(--racing-red-light);
}

.detect-banner-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.detect-banner-text {
  flex: 1;
}

.detect-banner-title {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 4px;
}

.detect-banner-sub {
  font-size: 13px;
  opacity: 0.85;
}

/* Field Hints */
.field-hint {
  font-weight: 400;
  font-size: 11px;
  margin-left: 6px;
}

.field-hint.ok {
  color: var(--status-green);
}

.field-hint.missing {
  color: var(--racing-red-light);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--card-dark);
  border: 1px solid var(--racing-red);
  color: var(--text-light);
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 14px;
  z-index: 3000;
  box-shadow: var(--shadow-red-glow);
  animation: toastIn 0.3s ease;
  display: none;
}

.toast.show {
  display: block;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}