/* Modern Theme CSS */
:root {
    --primary-color: #6366f1;
    --secondary-color: #14b8a6;
    --accent-color: #f59e0b;
    --text-color: #111827;
    --background-color: #f3f4f6;
    --card-bg: #ffffff;
    --dark-bg: #1f2937;
    --dark-text: #f3f4f6;
    --dark-card-bg: #2d3748;
    --dark-table-header: #4b5563;
    --border-color: #ddd;
    --dark-border-color: #4b5563;
    --hover-color: #e0f2fe;
    --dark-hover-color: #374151;
    --transition-speed: 0.3s;
    --shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    --dark-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

/* Base styles */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    padding: 0;
    margin: 0;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header styles */
header {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 1.5rem;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow);
}

header h1 {
    margin: 0;
    font-size: clamp(1.5rem, 5vw, 2.5rem);
}

header button#theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: white;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color var(--transition-speed);
}

header button#theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

header button#theme-toggle:focus {
    outline: 2px solid white;
    outline-offset: 2px;
}

/* Main container */
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    gap: 2rem;
    flex: 1;
    width: 100%;
    box-sizing: border-box;
    max-width: 1200px;
    margin: 0 auto;
}

/* Card styles */
.card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 900px;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
    box-sizing: border-box;
}

/* Loading indicator */
.loading-indicator {
    text-align: center;
    padding: 1rem;
    color: var(--primary-color);
    font-style: italic;
    display: none;
}

/* Chart container */
.chart-container {
    width: 100%;
    height: 400px;
    position: relative;
}

#price-chart {
    width: 100%;
    height: 100%;
}

/* Table styles */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 1rem;
    border-radius: 0.5rem;
}

#price-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

#price-table caption {
    margin-bottom: 0.5rem;
    font-weight: 600;
    text-align: left;
    color: var(--text-color);
}

#price-table th,
#price-table td {
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    text-align: left;
}

#price-table th {
    background-color: var(--primary-color);
    color: #fff;
    position: sticky;
    top: 0;
}

#price-table tbody tr:hover {
    background-color: var(--hover-color);
}

/* Footer styles */
footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
}

/* Dark mode */
body.dark {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

body.dark .card {
    background-color: var(--dark-card-bg);
    box-shadow: var(--dark-shadow);
}

body.dark #price-table caption {
    color: var(--dark-text);
}

body.dark #price-table th {
    background-color: var(--dark-table-header);
}

body.dark #price-table td {
    color: var(--dark-text);
    border-color: var(--dark-border-color);
}

body.dark #price-table tbody tr:hover {
    background-color: var(--dark-hover-color);
}

/* Selective transitions instead of applying to all elements */
.card,
header,
#price-table th,
#price-table td,
body,
button {
    transition: background-color var(--transition-speed), 
                color var(--transition-speed), 
                border-color var(--transition-speed),
                box-shadow var(--transition-speed);
}

/* Media queries for responsive design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    #price-table th,
    #price-table td {
        padding: 0.5rem;
    }
}

/* Print styles */
@media print {
    body {
        background-color: white;
        color: black;
    }
    
    header, footer, button#theme-toggle {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
        margin-bottom: 1rem;
    }
    
    .container {
        display: block;
        padding: 0;
    }
    
    #price-chart {
        height: 300px;
    }
    
    #price-table th {
        background-color: #f3f4f6;
        color: black;
    }
    
    #price-table th,
    #price-table td {
        border: 1px solid black;
    }
}