/* ===== GlobeTimeZone.com - Main Stylesheet ===== */

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary: #0f172a;
  --accent: #f59e0b;
  --success: #10b981;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --radius: 12px;
}

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

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

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== HEADER ===== */
header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--secondary);
  text-decoration: none;
}

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

nav { display: flex; gap: 4px; }

nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.2s;
  text-decoration: none;
}

nav a:hover, nav a.active {
  background: var(--primary-light);
  color: var(--primary);
  text-decoration: none;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #1d4ed8 100%);
  color: white;
  padding: 60px 24px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Ccircle cx='30' cy='30' r='20'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content { position: relative; max-width: 800px; margin: 0 auto; }

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.hero-badges {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.badge {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  backdrop-filter: blur(10px);
}

/* ===== MAIN LAYOUT ===== */
main { max-width: 1200px; margin: 0 auto; padding: 40px 24px; }

/* ===== CARD ===== */
.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 24px;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===== CONVERTER ===== */
.converter-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: end;
}

@media (max-width: 640px) {
  .converter-grid { grid-template-columns: 1fr; }
  .swap-btn { transform: rotate(90deg); margin: 0 auto; }
}

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

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-select, .form-input {
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  color: var(--text);
  background: white;
  transition: border-color 0.2s;
  outline: none;
  width: 100%;
}

.form-select:focus, .form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.swap-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: white;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.2s;
  flex-shrink: 0;
}

.swap-btn:hover {
  background: var(--primary);
  color: white;
  transform: rotate(180deg);
}

.result-box {
  background: var(--primary-light);
  border: 2px solid var(--primary);
  border-radius: 10px;
  padding: 20px 24px;
  margin-top: 24px;
  text-align: center;
}

.result-label {
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.result-time {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: -0.02em;
}

.result-date {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== WORLD CLOCK ===== */
.clocks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.clock-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  text-align: center;
  transition: box-shadow 0.2s;
}

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

.clock-city {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.clock-flag { font-size: 1.5rem; margin-bottom: 6px; }

.clock-time {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.clock-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.clock-offset {
  display: inline-block;
  margin-top: 8px;
  background: var(--bg);
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===== SECTION TITLES ===== */
.section-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.section-sub {
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* ===== ARTICLES ===== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.article-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: all 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  text-decoration: none;
}

.article-img {
  height: 10px;
}

.article-img.blue { background: linear-gradient(90deg, #2563eb, #1d4ed8); }
.article-img.green { background: linear-gradient(90deg, #059669, #10b981); }
.article-img.purple { background: linear-gradient(90deg, #7c3aed, #a78bfa); }
.article-img.orange { background: linear-gradient(90deg, #d97706, #f59e0b); }

.article-body { padding: 20px; }

.article-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.article-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== FOOTER ===== */
footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.7);
  padding: 48px 24px 24px;
  margin-top: 60px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  nav { display: none; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.75rem; }
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
  margin-bottom: 12px;
  display: block;
  text-decoration: none;
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: white;
  margin-bottom: 16px;
}

.footer-links { list-style: none; }

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

.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  transition: color 0.2s;
  text-decoration: none;
}

.footer-links a:hover { color: white; text-decoration: none; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.825rem;
}

/* ===== UTILITIES ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  text-decoration: none;
  color: white;
}

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

.btn-outline:hover {
  background: var(--primary-light);
  text-decoration: none;
}

.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.text-center { text-align: center; }

/* ===== ADS PLACEHOLDER ===== */
.ad-slot {
  background: var(--bg);
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 24px 0;
}