/* BK8 Sports Hub - Mobile-First CSS */
/* Optimized for LCP < 2s */
/* Theme: Sports Green/Teal - Athletic & Dynamic */

:root {
  --primary: #0d2818;
  --primary-dark: #061810;
  --primary-light: #163d28;
  --accent: #00d9a5;
  --accent-light: #00f5b8;
  --accent-glow: rgba(0, 217, 165, 0.25);
  --text: #ffffff;
  --text-light: #9cb8a8;
  --bg: #0a1612;
  --bg-card: #0d2818;
  --white: #fff;
  --border: #1e4d35;
  --shadow: 0 4px 12px rgba(0, 217, 165, 0.1);
  --gradient: linear-gradient(135deg, #0d2818 0%, #0a3d24 60%, #163d28 100%);
  --live-pulse: #ff4757;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* Critical CSS - Above the fold */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header - Mobile First */
.header {
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 3px solid var(--accent);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.logo-img {
  height: 32px;
  width: auto;
}

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

/* Mobile Navigation */
.nav-toggle {
  display: block;
  background: var(--accent);
  border: none;
  color: var(--primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 8px 12px;
  font-weight: 700;
}

.nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--primary);
  padding: 8px 16px;
  border-top: 1px solid var(--border);
}

.nav.active {
  display: block;
}

.nav-list {
  list-style: none;
}

.nav-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.nav-list a {
  color: var(--white);
  text-decoration: none;
  padding: 4px 0;
  display: block;
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.nav-list a:hover {
  color: var(--accent);
}

/* Hero Section - Left Aligned Sports Style */
.hero {
  background: var(--gradient);
  color: var(--white);
  padding: 48px 16px;
  text-align: left;
  border-bottom: 3px solid var(--accent);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.3;
}

.hero h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
  line-height: 1.2;
  text-transform: uppercase;
  font-weight: 800;
  position: relative;
}

.hero p {
  font-size: 1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-light);
}

/* Section Styles */
.section {
  padding: 40px 0;
}

.section-title {
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: var(--white);
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.card {
  background: var(--bg-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
  border: 1px solid var(--border);
  /* Sharp corners - no border-radius for sports look */
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 217, 165, 0.15);
  border-color: var(--accent);
}

.card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  background: var(--border);
}

/* Lazy loading placeholder */
.card-img[data-src] {
  background: linear-gradient(90deg, #e0e0e0 25%, #f0f0f0 50%, #e0e0e0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.card-content {
  padding: 16px;
}

.card-category {
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-title {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--white);
}

.card-title a {
  color: inherit;
  text-decoration: none;
}

.card-title a:hover {
  color: var(--accent);
}

.card-meta {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* Match Preview Card */
.match-card {
  background: var(--bg-card);
  padding: 0;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  border: 1px solid var(--border);
  /* Sharp corners */
}

.match-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: var(--primary-light);
  border-bottom: 2px solid var(--accent);
}

.match-league {
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.match-date {
  font-size: 0.8rem;
  color: var(--text-light);
}

.match-body {
  padding: 16px;
}

.match-teams {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.team {
  flex: 1;
}

.team-name {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--white);
}

.match-vs {
  font-size: 0.9rem;
  color: var(--text-light);
  padding: 0 12px;
}

.match-odds {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.odd-box {
  background: var(--primary-light);
  padding: 10px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
  /* Sharp corners */
}

.odd-box:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.odd-box:hover .odd-value {
  color: var(--primary);
}

.odd-label {
  font-size: 0.7rem;
  color: var(--text-light);
  margin-bottom: 4px;
}

.odd-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

/* CTA Button */
.btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--accent);
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  text-align: center;
  transition: all 0.2s ease;
  border: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  /* Sharp corners */
}

.btn:hover {
  background: var(--accent-light);
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
  display: block;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--primary);
}

/* Live Badge */
.live-badge {
  background: var(--live-pulse);
  color: white;
  padding: 3px 8px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Article Content */
.article {
  background: var(--bg-card);
  padding: 24px 16px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  /* Sharp corners */
}

.article h1 {
  font-size: 1.5rem;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--white);
}

.article-meta {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.article h2 {
  font-size: 1.25rem;
  margin: 24px 0 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.article h3 {
  font-size: 1.1rem;
  margin: 20px 0 10px;
  color: var(--white);
}

.article p {
  margin-bottom: 16px;
  color: var(--text-light);
}

.article ul, .article ol {
  margin-bottom: 16px;
  padding-left: 24px;
  color: var(--text-light);
}

.article li {
  margin-bottom: 8px;
}

/* Contextual Link Styling */
.contextual-link {
  color: var(--accent);
  text-decoration: underline;
  font-weight: 500;
}

.contextual-link:hover {
  color: var(--accent-light);
}

/* Betting Tips Box */
.tip-box {
  background: rgba(0, 217, 165, 0.1);
  border-left: 4px solid var(--accent);
  padding: 16px;
  margin: 20px 0;
}

.tip-box h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--accent);
}

/* Responsible Gambling Notice */
.responsible-notice {
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid var(--live-pulse);
  padding: 16px;
  margin: 24px 0;
  font-size: 0.9rem;
  color: var(--text-light);
}

.responsible-notice strong {
  display: block;
  margin-bottom: 8px;
  color: var(--live-pulse);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.responsible-notice a {
  color: var(--accent);
}

/* Footer */
.footer {
  background: var(--primary);
  color: var(--white);
  padding: 40px 0 20px;
  margin-top: 40px;
  border-top: 3px solid var(--accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.footer-section h4 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--accent);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 8px;
}

.footer-section a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-section a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 12px;
  line-height: 1.5;
  opacity: 0.7;
}

/* Breadcrumb */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  background: var(--primary);
}

.breadcrumb a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb span {
  color: var(--text-light);
  margin: 0 8px;
}

/* Tablet Styles */
@media (min-width: 600px) {
  .hero h1 {
    font-size: 2rem;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article {
    padding: 32px;
  }

  .article h1 {
    font-size: 1.75rem;
  }
}

/* Desktop Styles */
@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }

  .nav {
    display: block;
    position: static;
    background: none;
    padding: 0;
  }

  .nav-list {
    display: flex;
    gap: 24px;
  }

  .nav-list li {
    margin-bottom: 0;
  }

  .hero {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .section {
    padding: 60px 0;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .card-img {
    height: 180px;
  }

  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .article h1 {
    font-size: 2rem;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: var(--white);
  padding: 8px 16px;
  z-index: 1000;
}

.skip-link:focus {
  top: 0;
}