:root {
    /* Light theme variables */
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f9fa;
    --text-primary: #333;
    --text-secondary: #495057;
    --border-color: #e9ecef;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    /* Dark theme variables */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1000;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px var(--shadow-color);
}

h1,
h2,
h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

h1 a {
    color: var(--text-primary);
    text-decoration: none;
}

h1 a:hover {
    text-decoration: underline;
}

.current-stats {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.travel-time {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

select {
    padding: 5px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.stats-container {
    margin-top: 2rem;
}

.stats-section {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.stats-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 1rem;
}

.stat-item {
    flex: 1 1 200px;
    background-color: var(--bg-tertiary);
    padding: 15px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.stat-item strong {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.1em;
    color: var(--text-primary);
}

.daily-averages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin-top: 1rem;
}

.day-stat {
    background-color: var(--bg-tertiary);
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.day-stat:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.busy-periods {
    list-style: none;
}

.busy-period-item {
    padding: 10px;
    margin-bottom: 10px;
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.busy-period-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .stats-grid {
        gap: 10px;
    }

    .stat-item {
        flex: 1 1 100%;
    }

    .daily-averages {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .theme-toggle {
        top: 10px;
        right: 10px;
        padding: 8px 16px;
    }
}

.site-footer {
    margin-top: 4rem;
    padding: 2rem 0 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section {
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-link {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

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

.footer-icon {
    width: 18px;
    height: 18px;
    margin-right: 0.5rem;
}

.crypto-addresses {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.crypto-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.crypto-label {
    color: var(--text-secondary);
    min-width: 45px;
}

.crypto-address {
    font-family: monospace;
    padding: 0.25rem 0.5rem;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-primary);
    overflow-x: auto;
    white-space: nowrap;
    max-width: 200px;
}

.copy-button {
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.copy-button:hover {
    background-color: var(--bg-primary);
    transform: translateY(-1px);
}

.footer-bottom {
    margin-top: 2rem;
    padding: 1rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        padding: 0 1rem;
    }

    .crypto-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .crypto-address {
        max-width: 88vw;
        width: 100%;
    }
}