* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Malgun Gothic", sans-serif; background: #f5f5f5; min-height: 100vh; padding: 20px; line-height: 1.6; }
.container { max-width: 800px; margin: 0 auto; background: #fff; border: 1px solid #ddd; }
header { background: #2c3e50; color: #fff; padding: 25px 30px; border-bottom: 3px solid #1a252f; }
h1 { font-size: 1.6rem; font-weight: 600; margin-bottom: 15px; }
.home-link { display: inline-block; color: #ecf0f1; text-decoration: none; font-size: 0.95rem; margin-bottom: 15px; opacity: 0.8; transition: opacity 0.2s; font-weight: 500; }
.home-link:hover { opacity: 1; color: #fff; }
.info-box { background: #34495e; padding: 12px 18px; display: inline-block; border-left: 3px solid #8e44ad; }
.info-box p { margin: 3px 0; font-size: 0.95rem; color: #ecf0f1; }
.info-box strong { color: #fff; font-weight: 600; }
main { padding: 30px; }
h2 { color: #333; margin-bottom: 20px; font-size: 1.2rem; font-weight: 600; }

/* Compare Section */
.compare-section { background: #f8f9fa; border: 1px solid #e0e0e0; border-radius: 8px; padding: 20px; margin-bottom: 30px; }
.compare-row { display: flex; align-items: center; gap: 16px; justify-content: center; }
.compare-city { text-align: center; flex: 1; }
.city-select { width: 100%; padding: 8px 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; background: #fff; margin-bottom: 8px; }
.compare-time { font-size: 1.8rem; font-weight: 700; color: #2c3e50; font-family: 'Consolas', 'Monaco', monospace; }
.compare-date { font-size: 0.85rem; color: #666; margin-top: 4px; }
.compare-diff { flex-shrink: 0; text-align: center; }
.diff-badge { display: inline-block; background: #8e44ad; color: #fff; padding: 6px 14px; border-radius: 20px; font-size: 0.9rem; font-weight: 600; }

/* Cities Grid */
.cities-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.city-card { background: #f8f9fa; border: 1px solid #e0e0e0; border-radius: 8px; padding: 16px; text-align: center; transition: all 0.2s; }
.city-card:hover { border-color: #8e44ad; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.city-flag { font-size: 1.5rem; margin-bottom: 4px; }
.city-name { font-size: 0.9rem; font-weight: 600; color: #333; margin-bottom: 8px; }
.city-time { font-size: 1.4rem; font-weight: 700; color: #2c3e50; font-family: 'Consolas', 'Monaco', monospace; }
.city-date { font-size: 0.8rem; color: #888; margin-top: 4px; }
.city-tz { font-size: 0.75rem; color: #8e44ad; font-weight: 500; margin-top: 2px; }

footer { background: #f8f9fa; text-align: center; padding: 15px 20px; color: #777; font-size: 0.85rem; border-top: 1px solid #ddd; }
.footer-links { margin-top: 8px; }
.lang-select { padding: 4px 8px; border: 1px solid #ccc; border-radius: 4px; font-size: 0.85rem; background: #fff; color: #333; cursor: pointer; }
.toast { position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%) translateY(100px); background: #2c3e50; color: #fff; padding: 12px 24px; border-radius: 4px; font-size: 0.9rem; opacity: 0; transition: all 0.3s ease; z-index: 1000; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 768px) {
    body { padding: 10px; } h1 { font-size: 1.3rem; } header { padding: 20px; } main { padding: 20px; }
    .cities-grid { grid-template-columns: repeat(2, 1fr); }
    .compare-row { flex-direction: column; }
    .compare-time { font-size: 1.4rem; }
}
@media (max-width: 480px) {
    .cities-grid { grid-template-columns: 1fr; }
}