:root {
    color-scheme: dark;
    --bg: #070b12;
    --panel: #0f1622;
    --panel-strong: #121c2b;
    --text: #d6f5ff;
    --muted: #7f9bb3;
    --accent: #6ef3b1;
    --source: #4ecbff;
    --core: #ffd27a;
    --border: #233348;
    --shadow: rgba(10, 18, 30, 0.6);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "IBM Plex Mono", "Share Tech Mono", "Consolas", "Courier New", monospace;
    letter-spacing: 0.01em;
}

a {
    color: var(--accent);
    text-decoration: none;
}

.screen {
    max-width: 1120px;
    margin: 0 auto;
    padding: 40px 24px 64px;
}

.hero {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.back {
    font-size: 0.95rem;
    color: var(--muted);
}

.badge {
    display: inline-flex;
    align-self: flex-start;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(110, 243, 177, 0.15);
    color: var(--accent);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

h1 {
    font-size: clamp(2rem, 3.5vw, 3rem);
    margin: 0;
}

.subtitle {
    color: var(--muted);
    font-size: 1.1rem;
    margin: 0;
}

.panel {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 28px;
    align-items: start;
}

.panel-info {
    padding: 24px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 20px 40px var(--shadow);
}

.instructions p {
    margin: 0 0 12px 0;
    font-weight: 600;
}

.instructions ul {
    margin: 0 0 16px 18px;
    padding: 0;
    color: var(--muted);
}

.instructions li {
    margin-bottom: 6px;
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 12px 0 16px;
}

.btn {
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 0.12s ease, border 0.12s ease, background 0.12s ease;
}

.btn:hover {
    transform: translateY(-1px);
    border-color: var(--accent);
}

.btn.primary {
    background: var(--accent);
    color: #04110b;
    border-color: transparent;
    font-weight: 600;
}

.btn.ghost {
    background: rgba(255, 255, 255, 0.02);
}

.legend {
    display: flex;
    gap: 12px;
    margin-bottom: 18px;
}

.chip {
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.chip.source {
    background: rgba(78, 203, 255, 0.18);
    color: var(--source);
}

.chip.core {
    background: rgba(255, 210, 122, 0.18);
    color: var(--core);
}

.status {
    padding: 14px 16px;
    border-radius: 12px;
    background: var(--panel-strong);
    border: 1px solid var(--border);
    color: var(--muted);
}

.panel-board {
    display: flex;
    justify-content: center;
}

.canvas-wrap {
    position: relative;
    padding: 16px;
    border-radius: 20px;
    background: #0b121c;
    border: 1px solid var(--border);
    box-shadow: 0 24px 50px var(--shadow);
}

canvas {
    display: block;
    border-radius: 12px;
    background: #05080f;
}

.scanlines {
    pointer-events: none;
    position: absolute;
    inset: 16px;
    border-radius: 12px;
    background-image: linear-gradient(
        rgba(255, 255, 255, 0.04) 1px,
        rgba(0, 0, 0, 0) 1px
    );
    background-size: 100% 3px;
    mix-blend-mode: screen;
}

.footer {
    margin-top: 28px;
    color: var(--muted);
}

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

    .panel-board {
        order: -1;
    }
}

@media (max-width: 640px) {
    .screen {
        padding: 28px 16px 48px;
    }

    .canvas-wrap {
        padding: 12px;
    }

    canvas {
        width: 100%;
        height: auto;
    }
}