:root {
    --bg-color: #0b0c10;
    --card-bg: #1f2833;
    --text-color: #c5c6c7;
    --accent-color: #66fcf1;
    --gold-accent: #45a29e;
}

[data-theme="cyberpunk"] {
    --bg-color: #05021a;
    --card-bg: #12092b;
    --text-color: #00ffff;
    --accent-color: #ff007f;
    --gold-accent: #ff00ff;
}

[data-theme="light"] {
    --bg-color: #f4f6f8;
    --card-bg: #ffffff;
    --text-color: #212529;
    --accent-color: #0d6efd;
    --gold-accent: #ffc107;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
}

#canvas-container {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    z-index: -1;
    pointer-events: none;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    position: sticky; top: 0; z-index: 100;
}

.chart-section {
    background: rgba(0, 0, 0, 0.75);
    margin: 20px 30px;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--accent-color);
}

.yt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    padding: 30px;
}

.card {
    background: var(--card-bg);
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.1);
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.card video {
    width: 100%; height: 180px; object-fit: cover; background: #000;
}

.card-body { padding: 15px; }

.coupon-code {
    display: inline-block; padding: 6px 12px;
    background: var(--accent-color); color: #000;
    font-weight: bold; border-radius: 4px; margin-top: 10px;
}

.toolbox-bar {
    position: fixed; bottom: 20px; right: 20px;
    background: rgba(0,0,0,0.9); border: 1px solid var(--accent-color);
    padding: 10px 18px; border-radius: 30px; display: flex; gap: 12px; z-index: 200;
}