:root {
    --bg: #050507;
    --text: #f8fafc;
    --dim: #8b95a5;
    --dim-subtle: #4d5766;
    --accent: #ffffff;
    --accent-glow: rgba(255, 255, 255, 0.35);
    --border: rgba(255, 255, 255, 0.12);
    --border-hover: rgba(255, 255, 255, 0.32);
    --font: 'JetBrains Mono', monospace;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 13px;
    line-height: 1.65;
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

#hero-webgl-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    opacity: 0.85;
}

.content-container {
    position: relative;
    z-index: 10;
    max-width: 620px;
    margin: 8vh auto;
    padding: 28px 26px;
    background: rgba(8, 8, 12, 0.82);
    border: 1px solid var(--border);
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.85), 0 0 1px rgba(255, 255, 255, 0.15) inset;
}

header {
    margin-bottom: 24px;
}

h1 {
    font-size: 26px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
    letter-spacing: -0.02em;
    text-shadow: 0 0 16px var(--accent-glow);
}

.subtitle {
    color: var(--dim);
    font-size: 11px;
    letter-spacing: 0.04em;
}

a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dotted var(--dim);
    transition: all 0.15s ease;
}

a:hover {
    border-bottom-color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow);
}

.actions {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.btn {
    padding: 6px 0;
    color: var(--dim);
    border-bottom: none;
    transition: all 0.15s ease;
}

.btn:hover {
    color: var(--text);
    text-decoration: none;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.25);
}

.btn.active {
    color: var(--accent);
    font-weight: 700;
    text-shadow: 0 0 14px var(--accent-glow);
}

section {
    margin-bottom: 30px;
}

h3 {
    font-size: 12px;
    font-weight: 700;
    color: var(--dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    border-bottom: 1px dashed var(--border);
    padding-bottom: 4px;
    display: inline-block;
}

ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 9px;
}

li {
    padding-left: 14px;
    position: relative;
    color: var(--text);
    font-size: 12.5px;
}

li strong {
    color: var(--accent);
}

li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 11px;
    top: 1px;
    text-shadow: 0 0 8px var(--accent-glow);
}

.dsp-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.sound-demo-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    color: var(--dim);
    font-family: var(--font);
    font-size: 11.5px;
    padding: 9px 12px;
    cursor: pointer;
    text-align: left;
    transition: all 0.18s ease;
    user-select: none;
}

.sound-demo-btn:hover {
    border-color: var(--border-hover);
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

.sound-demo-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 16px rgba(255, 255, 255, 0.15);
    text-shadow: 0 0 8px var(--accent-glow);
}

footer {
    border-top: 1px solid var(--border);
    padding-top: 16px;
    color: var(--dim);
    font-size: 10.5px;
}

@media (max-width: 600px) {
    .content-container {
        margin: 4vh 14px;
        padding: 22px 18px;
    }
    .dsp-grid {
        grid-template-columns: 1fr;
    }
}