:root {
    color-scheme: dark;
    --bg: #0b1019;
    --panel: #121a26;
    --panel-soft: #0f1622;
    --ink: #7bffea;
    --accent: #ff9bd1;
    --accent-2: #ffd166;
    --text: #eaf2ff;
    --muted: #9bb0d1;
    --paper: #f3edd7;
    --paper-ink: #2e3744;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "IBM Plex Mono", "Segoe UI", "Helvetica Neue", Arial, monospace;
    background: radial-gradient(circle at top, #1c2940, #0b1019 55%);
    color: var(--text);
}

.shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px 48px;
}

.hero {
    margin-bottom: 24px;
}

.back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.back:hover {
    color: var(--text);
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border: 1px solid rgba(123, 255, 234, 0.4);
    color: var(--ink);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.7rem;
    margin-bottom: 12px;
}

.hero h1 {
    font-size: 2.4rem;
    margin: 0 0 8px;
}

.subtitle {
    color: var(--muted);
    margin: 0;
}

.workbench {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.panel {
    background: linear-gradient(160deg, rgba(21, 30, 46, 0.94), rgba(10, 16, 28, 0.94));
    border: 1px solid rgba(123, 255, 234, 0.15);
    border-radius: 18px;
    padding: 20px;
    box-shadow: 0 18px 35px rgba(4, 10, 18, 0.6);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.panel-header h2 {
    font-size: 1.1rem;
    margin: 0;
}

.meter {
    font-size: 0.9rem;
    color: var(--muted);
}

.paper-wrap {
    position: relative;
    border-radius: 14px;
    padding: 12px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(0, 0, 0, 0.2));
    border: 1px solid rgba(123, 255, 234, 0.18);
}

canvas {
    width: 100%;
    display: block;
    border-radius: 10px;
    background: var(--paper);
    border: 1px solid rgba(20, 26, 34, 0.2);
    image-rendering: pixelated;
}

.paper-overlay {
    position: absolute;
    inset: 12px;
    border-radius: 10px;
    pointer-events: none;
    background: repeating-linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.22) 0,
        rgba(255, 255, 255, 0.22) 1px,
        rgba(0, 0, 0, 0) 8px,
        rgba(0, 0, 0, 0) 16px
    );
    mix-blend-mode: multiply;
    opacity: 0.35;
}

.status {
    margin-top: 12px;
    font-size: 0.95rem;
    color: var(--muted);
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--muted);
    margin-bottom: 16px;
}

textarea {
    min-height: 140px;
    resize: vertical;
    border-radius: 12px;
    padding: 12px;
    border: 1px solid rgba(123, 255, 234, 0.2);
    background: rgba(6, 10, 16, 0.7);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
}

.control-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.btn {
    border: none;
    border-radius: 999px;
    padding: 10px 16px;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    background: var(--ink);
    color: #0b111a;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(72, 255, 226, 0.2);
}

.btn.ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(123, 255, 234, 0.4);
    box-shadow: none;
}

.chip {
    border: 1px solid rgba(123, 255, 234, 0.35);
    border-radius: 999px;
    padding: 6px 12px;
    background: rgba(10, 16, 28, 0.7);
    color: var(--text);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
}

.chip.ghost {
    border-color: rgba(255, 155, 209, 0.6);
    color: var(--accent);
}

.slider {
    display: grid;
    gap: 8px;
    margin-bottom: 18px;
}

.slider-label {
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 0.9rem;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.presets {
    margin-bottom: 16px;
}

.preset-title {
    margin: 0 0 10px;
    color: var(--muted);
    font-size: 0.9rem;
}

.preset-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tips {
    background: rgba(7, 12, 20, 0.6);
    border-radius: 14px;
    padding: 14px;
    border: 1px solid rgba(123, 255, 234, 0.15);
    color: var(--muted);
    font-size: 0.92rem;
}

.tips ul {
    margin: 10px 0 0;
    padding-left: 18px;
}

.footer {
    margin-top: 24px;
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 720px) {
    .hero h1 {
        font-size: 2rem;
    }

    .panel {
        padding: 16px;
    }
}