:root {
    --bg: #0f1724;
    --muted: #94a3b8;
    --accent: #3c8f3f;
    --glass: rgba(255, 255, 255, 0.04);
    --max-width: 1400px;
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
}

* {
    box-sizing: border-box
}

html, body {
    height: 100%;
    background: #0f1724;
    color: #e6eef8;
    margin: 0
}

a {
    color: inherit
}

.wrap {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 48px 64px
}

/* Header */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px
}

.brand {
    display: flex;
    gap: 12px;
    align-items: center
}

.logo {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-weight: 800
}

nav {
    display: flex;
    gap: 12px;
    align-items: center
}

nav a {
    padding: 8px 12px;
    border-radius: 8px;
    color: var(--muted);
    font-size: 14px;
    transition: all 0.2s
}

nav a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05)
}

nav a.cta {
    background: var(--glass);
    color: #fff
}

nav a.cta:hover {
    background: rgba(255, 255, 255, 0.08)
}

/* Hero */
.hero {
    display: grid;
    grid-template-columns:1.2fr 420px;
    gap: 48px;
    align-items: center;
    margin-top: 64px
}

.hero .title {
    font-size: 56px;
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.02em
}

.hero p {
    color: var(--muted);
    margin-top: 16px;
    font-size: 18px;
    line-height: 1.6
}

.card {
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(2, 6, 23, 0.6)
}

/* Play box */
.playbox {
    display: flex;
    flex-direction: column;
    gap: 14px
}

.controls {
    display: flex;
    gap: 8px;
    align-items: center
}

select {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 12px;
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    width: 100%;
}

select option {
    background-color: #0f1724;
    color: white;
}

button.play {
    background: linear-gradient(90deg, var(--accent), #3baa3d);
    border: none;
    padding: 12px 18px;
    border-radius: 10px;
    color: white;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s
}

button.play:hover {
    transform: scale(1.02)
}

.small {
    font-size: 13px;
    color: var(--muted)
}

/* Features */
.features {
    display: grid;
    grid-template-columns:repeat(3, 1fr);
    gap: 18px;
    margin-top: 32px
}

.feature {
    padding: 20px;
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), rgba(255, 255, 255, 0.01));
}

.feature h4 {
    margin: 8px 0;
    font-size: 16px
}

.feature p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5
}

/* Performance Comparison */
.perf-section {
    margin-top: 130px
}

.perf-grid {
    display: grid;
    grid-template-columns:repeat(3, 1fr);
    gap: 20px;
    margin-top: 24px
}

.perf-card {
    padding: 24px;
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
    text-align: center;
    position: relative
}

.perf-card.featured {
    border: 2px solid var(--accent);
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.08), rgba(139, 92, 246, 0.02))
}

.perf-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--accent);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase
}

.perf-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px
}

.perf-subtitle {
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 16px
}

.perf-stats {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px
}

.perf-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05)
}

.perf-stat-label {
    color: var(--muted);
    font-size: 13px
}

.perf-stat-value {
    font-weight: 700
}

.perf-stat-value.good {
    color: #10b981
}

.perf-stat-value.ok {
    color: #f59e0b
}

.perf-stat-value.bad {
    color: #ef4444
}

/* Q&A Section */
.qna-section {
    margin-top: 48px
}

.qna-list {
    display: grid;
    gap: 16px;
    margin-top: 24px
}

.qna-item {
    padding: 20px;
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01))
}

.qna-question {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 12px
}

.qna-answer {
    color: var(--muted);
    line-height: 1.6;
    font-size: 14px
}

footer {
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--muted);
    font-size: 13px;
    display: flex;
    justify-content: space-between;
    align-items: center
}

/* Responsive */
@media (max-width: 1200px) {
    .wrap {
        padding: 32px 48px
    }

    .hero .title {
        font-size: 48px
    }
}

@media (max-width: 980px) {
    .hero {
        grid-template-columns:1fr
    }

    .features {
        grid-template-columns:repeat(2, 1fr)
    }

    .perf-grid {
        grid-template-columns:1fr
    }
}

@media (max-width: 640px) {
    .wrap {
        padding: 18px
    }

    .features {
        grid-template-columns:1fr
    }

    nav {
        display: none
    }

    .logo {
        width: 40px;
        height: 40px
    }

    .hero .title {
        font-size: 36px
    }
}