:root {
    --bg-0: #0b1220;
    --bg-1: #13213a;
    --bg-2: #1b2f4d;
    --ice: #cfeeff;
    --snow: #f5fbff;
    --accent: #7fd8ff;
    --accent-2: #a7e8ff;
    --text: #e9f2ff;
    --muted: #b6c8df;
    --ok: #9cf0b4;
    --warn: #ffd47e;
    --shadow: rgba(0, 0, 0, 0.35);
    --card: rgba(255, 255, 255, 0.06);
    --card-border: rgba(255, 255, 255, 0.15);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    color: var(--text);
    background: radial-gradient(circle at 15% 10%, #223a5f 0%, var(--bg-1) 28%, var(--bg-0) 100%);
    font-family: "Trebuchet MS", "Segoe UI", Arial, sans-serif;
    image-rendering: pixelated;
}

body {
    display: flex;
    justify-content: center;
    padding: 2rem 1rem 3rem;
    position: relative;
    overflow-x: hidden;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

body::before {
    background-image:
            radial-gradient(2px 2px at 15% 20%, rgba(255, 255, 255, 0.7) 50%, transparent 51%),
            radial-gradient(2px 2px at 35% 40%, rgba(255, 255, 255, 0.5) 50%, transparent 51%),
            radial-gradient(2px 2px at 65% 15%, rgba(255, 255, 255, 0.6) 50%, transparent 51%),
            radial-gradient(2px 2px at 80% 75%, rgba(255, 255, 255, 0.7) 50%, transparent 51%),
            radial-gradient(2px 2px at 25% 85%, rgba(255, 255, 255, 0.55) 50%, transparent 51%);
    opacity: 0.35;
}

body::after {
    background: linear-gradient(180deg, transparent 0%, rgba(181, 227, 255, 0.08) 100%);
}

.page {
    width: min(1100px, 100%);
    position: relative;
    z-index: 1;
    display: grid;
    gap: 1rem;
}

.hero,
.panel {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    box-shadow: 0 10px 35px var(--shadow);
    backdrop-filter: blur(3px);
}

.hero {
    padding: 1rem 1.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1rem;
}

.title-group h1 {
    margin: 0;
    font-size: clamp(1.5rem, 2.3vw, 2rem);
    letter-spacing: 0.02em;
}

.title-group p {
    margin: 0.3rem 0 0;
    color: var(--muted);
    max-width: 60ch;
    font-size: 0.95rem;
    line-height: 1.4;
}

.pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pill {
    border: 1px solid rgba(167, 232, 255, 0.35);
    background: rgba(127, 216, 255, 0.12);
    color: var(--snow);
    padding: 0.35rem 0.55rem;
    border-radius: 999px;
    font-size: 0.8rem;
    white-space: nowrap;
}

.layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
}

.game-shell {
    padding: 1rem;
    display: grid;
    gap: 0.8rem;
}

.status-row {
    display: grid;
    gap: 0.5rem;
}

.loading {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--muted);
    font-size: 0.9rem;
    min-height: 1.1rem;
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--accent-2);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex: 0 0 auto;
}

#status {
    font-weight: 600;
    color: var(--ice);
}

#progress {
    width: 100%;
    height: 12px;
    border: 0;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.15);
}

#progress::-webkit-progress-bar {
    background: rgba(255, 255, 255, 0.15);
}

#progress::-webkit-progress-value {
    background: linear-gradient(90deg, #95dfff, #d8f4ff);
}

#progress::-moz-progress-bar {
    background: linear-gradient(90deg, #95dfff, #d8f4ff);
}

.canvas-frame {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 0.6rem;
    overflow: auto;
}

#canvas {
    display: block;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: #000;
    outline: none;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.controls label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    user-select: none;
    cursor: pointer;
}

.controls input[type="checkbox"] {
    accent-color: #8ad6ff;
    cursor: pointer;
}

.btn {
    border: 1px solid rgba(167, 232, 255, 0.6);
    color: var(--snow);
    background: linear-gradient(180deg, rgba(146, 217, 255, 0.35), rgba(88, 173, 222, 0.3));
    border-radius: 8px;
    padding: 0.42rem 0.7rem;
    font-weight: 600;
    cursor: pointer;
}

.btn:hover {
    filter: brightness(1.08);
}

.sidebar {
    padding: 1rem;
    display: grid;
    gap: 0.8rem;
    align-content: start;
}

.sidebar h2 {
    margin: 0;
    font-size: 1.05rem;
}

.sidebar p,
.sidebar li {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.45;
}

.sidebar ul {
    margin: 0;
    padding-left: 1.1rem;
    display: grid;
    gap: 0.45rem;
}

.hint {
    border-left: 3px solid var(--accent);
    padding: 0.5rem 0.65rem;
    background: rgba(127, 216, 255, 0.1);
    border-radius: 6px;
    color: #d5f2ff;
}

#output {
    display: none;
    width: 100%;
    min-height: 120px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #fff;
    background: #0a0f19;
    font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
    font-size: 0.8rem;
    padding: 0.5rem;
    resize: vertical;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 920px) {
    .layout {
        grid-template-columns: 1fr;
    }
}