*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --bg-primary: #f8fafc;
    --bg-secondary: #e7eeef;
    --text-primary: #1a1a2e;
    --text-secondary: rgba(0, 0, 0, 0.7);
    --border-color: rgba(0, 0, 0, 0.1);
    --panel-bg: rgba(255, 255, 255, 0.9);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1b1b22;
        --bg-secondary: #0f0f14;
        --text-primary: #f0f0f5;
        --text-secondary: rgba(255, 255, 255, 0.7);
        --border-color: rgba(255, 255, 255, 0.1);
        --panel-bg: rgba(30, 30, 40, 0.9);
    }
}

body {
    margin: 0;
    padding: 0;
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
        sans-serif;
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    min-height: 100vh;
    color: var(--text-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.chrome-notice {
    background: linear-gradient(
        135deg,
        rgba(255, 107, 107, 0.1),
        rgba(255, 193, 7, 0.1)
    );
    border: 1px solid rgba(255, 107, 107, 0.3);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.chrome-notice-icon {
    font-size: 1.5rem;
}

.chrome-notice-text {
    font-size: 0.9rem;
    line-height: 1.5;
}

.demo-section {
    margin-bottom: 3rem;
}

.demo-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.demo-title::before {
    content: "";
    width: 4px;
    height: 1.25rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 2px;
}

.demo-area {
    position: relative;
    height: 500px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-image:
        linear-gradient(to right, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        radial-gradient(
            120% 100% at 10% 0%,
            var(--bg-primary),
            var(--bg-secondary)
        );
    background-size:
        24px 24px,
        24px 24px,
        100% 100%;
    background-position:
        12px 12px,
        12px 12px,
        0 0;
}

@media (prefers-color-scheme: dark) {
    .demo-area {
        background-image:
            linear-gradient(
                to right,
                rgba(255, 255, 255, 0.03) 1px,
                transparent 1px
            ),
            linear-gradient(
                to bottom,
                rgba(255, 255, 255, 0.03) 1px,
                transparent 1px
            ),
            radial-gradient(
                120% 100% at 10% 0%,
                var(--bg-primary),
                var(--bg-secondary)
            );
    }
}

.demo-content {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
}

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

.demo-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.demo-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #e53e3e;
    margin-bottom: 1rem;
}

.demo-label-line {
    height: 2px;
    width: 40px;
    background: currentColor;
}

.demo-label-text {
    text-transform: uppercase;
    letter-spacing: 0.25em;
    font-size: 11px;
    font-weight: 500;
}

.demo-heading {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 0.95;
    margin: 0 0 1rem 0;
}

.demo-heading-dim {
    opacity: 0.4;
}

.demo-description {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.demo-description p {
    margin: 0 0 0.75rem 0;
}

.demo-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.demo-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.glass-element {
    position: absolute;
    cursor: grab;
    touch-action: none;
    user-select: none;
    will-change: transform;
}

.glass-element:active {
    cursor: grabbing;
}

.glass-inner {
    width: 100%;
    height: 100%;
    border-radius: inherit;
    will-change: transform, box-shadow;
}

.controls-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.controls-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.controls-header-text {
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 10px;
    opacity: 0.7;
}

.controls-header-line {
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.control-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.control-row:last-child {
    margin-bottom: 0;
}

.control-label {
    width: 160px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 11px;
    opacity: 0.8;
    flex-shrink: 0;
}

.control-value {
    width: 50px;
    text-align: right;
    font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
    font-size: 11px;
    opacity: 0.6;
    font-variant-numeric: tabular-nums;
    flex-shrink: 0;
}

.control-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 2px;
    background: rgba(128, 128, 128, 0.2);
    border-radius: 1px;
    outline: none;
}

.control-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    cursor: pointer;
    transition: transform 0.15s ease;
}

.control-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.control-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    cursor: pointer;
    border: none;
}

.surface-selector {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    flex: 1;
}

.surface-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.surface-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: #667eea;
}

.surface-btn.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-color: transparent;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .preview-grid {
        grid-template-columns: 1fr;
    }
}

.preview-card {
    background: var(--panel-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.preview-header {
    padding: 0.75rem 1rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 9px;
    opacity: 0.7;
    border-bottom: 1px solid var(--border-color);
}

.preview-content {
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 150px;
    background: #1a1a2e;
}

.preview-canvas {
    max-width: 100%;
    border-radius: 8px;
}

.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer a {
    color: #667eea;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.filter-svg {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}