@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700;900&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --bg: #000;
    --text: #E0E0E0;
    --theme-color: #00FFC2;
    --theme-color-glow: rgba(0, 255, 194, 0.4);
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    overflow-x: hidden;
    padding: 0;
    margin: 0;
}

.btn-back {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #888;
    padding: 12px 24px;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.btn-back:hover {
    color: var(--theme-color);
    border-color: var(--theme-color);
    box-shadow: 0 0 20px var(--theme-color-glow);
}

.container {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 80px 40px 40px 40px;
    gap: 60px;
}

@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
        padding: 120px 20px 40px 20px;
    }
}

.visual-stage {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 40px;
}

.visual-stage svg {
    width: 100%;
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 0 20px var(--theme-color-glow));
}

.specs-panel {
    padding: 20px;
}

.specs-panel h1 {
    font-size: 4rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    color: #fff;
    line-height: 1;
}

@media (max-width: 768px) {
    .specs-panel h1 {
        font-size: 2.5rem;
    }
}

.price-tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--theme-color);
    margin-bottom: 30px;
}

.description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #999;
    margin-bottom: 40px;
    max-width: 600px;
}

.spec-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

@media (max-width: 640px) {
    .spec-grid {
        grid-template-columns: 1fr;
    }
}

.spec-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.spec-item label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #666;
}

.spec-item span {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--theme-color);
}

.interactive-demo {
    margin-top: 40px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.demo-btn {
    background: #fff;
    color: #000;
    border: none;
    padding: 16px 32px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
    max-width: 400px;
}

.demo-btn:hover {
    background: var(--theme-color);
    box-shadow: 0 0 30px var(--theme-color-glow);
    transform: scale(1.02);
}

.output-log {
    margin-top: 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--theme-color);
    background: #000;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    min-height: 60px;
    display: flex;    align-items: center;
}

input[type="range"] {
    width: 100%;
    max-width: 400px;
    margin: 10px 0;
    accent-color: var(--theme-color);
}

label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;    color: #888;
    margin-bottom: 10px;
}