/* Variables */
:root {
    --bg-color: #0f1117;
    --card-bg: #1a1d26;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --accent-color: #f5a623;
    --accent-hover: #e09612;
    --border-color: #2d3748;
    --input-bg: #2d3748;
    --max-width: 820px;
    --font-display: 'DM Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-nav {
    display: flex;
    gap: 20px;
    flex: 1;
    justify-content: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Main Content */
main {
    flex: 1;
    padding: 40px 0;
}

h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

/* Converter Card */
.converter-card {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin-bottom: 40px;
}

.converter-row {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.converter-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.converter-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.custom-select-wrapper {
    position: relative;
}

.zone-search {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    margin-bottom: 4px;
}

.zone-select {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    cursor: pointer;
}

.live-time {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--accent-color);
    margin-top: 4px;
}

.swap-button {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    padding: 10px;
    cursor: pointer;
    margin-top: 32px;
    transition: all 0.2s;
}

.swap-button:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background-color: rgba(245, 166, 35, 0.1);
}

.input-row {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.input-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.input-group input {
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
}

/* Result Display */
.result-display {
    text-align: center;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.time-output {
    font-family: var(--font-mono);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1;
    margin-bottom: 10px;
}

.date-output {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* World Clocks */
.world-clocks-section h2 {
    font-family: var(--font-display);
    text-align: center;
    margin-bottom: 30px;
}

.world-clocks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.clock-card {
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.clock-city {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.clock-time {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--accent-color);
}

.clock-offset {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Ad Slots */
.ad-slot {
    margin: 30px 0;
    display: flex;
    justify-content: center;
}

.ad-placeholder {
    background-color: #1a1d26;
    border: 1px dashed var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ad-leaderboard .ad-placeholder {
    width: 728px;
    height: 90px;
}

.ad-rectangle .ad-placeholder {
    width: 336px;
    height: 280px;
}

/* Footer */
.site-footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-nav {
    display: flex;
    gap: 20px;
}

.footer-nav a {
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-nav a:hover {
    color: var(--text-primary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .converter-row {
        flex-direction: column;
    }
    
    .swap-button {
        margin: 0 auto;
        transform: rotate(90deg);
    }

    .ad-leaderboard .ad-placeholder {
        width: 320px;
        height: 50px;
    }

    .time-output {
        font-size: 2.5rem;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
    }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .converter-card {
        padding: 15px;
    }
    .time-output {
        font-size: 2rem;
    }
}