/* Bitcoin Block Data Visualization - Styles */

:root {
    --primary-color: #f7931a;
    --secondary-color: #4d94ff;
    --background: #f5f7fa;
    --card-background: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #e1e8ed;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
    --chart-grid: rgba(0, 0, 0, 0.1);
    --chart-text: #666666;
}

/* Dark Mode */
[data-theme="dark"] {
    --primary-color: #f7931a;
    --secondary-color: #6eb5ff;
    --background: #1a1a2e;
    --card-background: #16213e;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --border-color: #2d3a4f;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.4);
    --chart-grid: rgba(255, 255, 255, 0.1);
    --chart-text: #a0a0a0;
}

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

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 40px 20px;
    margin-bottom: 40px;
    position: relative;
}

/* Header Controls */
.header-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
}

.control-toggle {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
}

.control-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

.control-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.stat-card {
    background: var(--card-background);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Chart Sections */
main {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.chart-section {
    background: var(--card-background);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.chart-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.chart-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.chart-container {
    position: relative;
    height: 400px;
    margin-top: 20px;
}

/* Responsive canvas */
.chart-container canvas {
    max-height: 400px;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

footer p {
    margin: 5px 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 15px;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .chart-section {
        padding: 20px;
    }

    .chart-section h2 {
        font-size: 1.3rem;
    }

    .chart-container {
        height: 300px;
    }

    .chart-container canvas {
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    header {
        padding: 20px 10px;
    }

    h1 {
        font-size: 1.75rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .chart-section {
        padding: 15px;
    }

    .chart-container {
        height: 250px;
    }

    .chart-container canvas {
        max-height: 250px;
    }
}

/* Loading States */
.stat-value:empty::before {
    content: "Loading...";
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chart-section {
    animation: fadeIn 0.5s ease-out;
}

.stat-card {
    animation: fadeIn 0.5s ease-out;
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .chart-section {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }

    footer {
        page-break-before: always;
    }
}