:root {
    color-scheme: dark;
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --bg: #0c1324;
    --panel: #151d34;
    --hud: rgba(18, 27, 50, 0.7);
    --border: rgba(255, 255, 255, 0.08);
    --fg: #f8f9ff;
    --muted: #93a1c9;
    --accent: #6c8dff;
    --accent-strong: #8ea9ff;
    --success: #38f5b8;
    --danger: #f9717c;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at 20% -10%, rgba(108, 141, 255, 0.25), transparent 42%), var(--bg);
    color: var(--fg);
    display: grid;
    place-items: center;
    padding: 24px;
}

.shell {
    width: min(960px, 100%);
    display: grid;
    gap: 24px;
}

.masthead {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    padding: 20px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: linear-gradient(145deg, rgba(21, 29, 52, 0.92), rgba(12, 18, 34, 0.9));
}

.masthead__brand {
    display: flex;
    gap: 16px;
    align-items: center;
}

.brand__emblem {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background:
        radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.42), transparent 55%),
        linear-gradient(135deg, var(--accent), transparent);
}

.masthead__stats {
    display: flex;
    gap: 20px;
    justify-content: space-evenly;
}

.stat {
    text-align: center;
    display: grid;
    gap: 4px;
}

.stat__label {
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--muted);
    text-transform: uppercase;
}

.stat__value {
    font-size: 26px;
    font-weight: 700;
}

.masthead__langs {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.lang-btn {
    border-radius: 999px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--fg);
    padding: 8px 18px;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.1s ease;
}

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

.playfield {
    display: grid;
}

.panel {
    padding: 28px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: rgba(17, 24, 44, 0.82);
    display: grid;
    gap: 22px;
}

.panel__header h2 {
    margin: 0;
}

.panel__header p {
    margin: 8px 0 0;
    color: var(--muted);
}

.word-display {
    display: grid;
    gap: 16px;
}

.hint {
    background: rgba(13, 20, 36, 0.9);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
    display: grid;
    gap: 6px;
}

.hint__label {
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--muted);
    text-transform: uppercase;
}

.hint__text {
    font-size: 18px;
    margin: 0;
}

.scramble {
    text-align: center;
    font-size: clamp(32px, 6vw, 48px);
    font-weight: 700;
    letter-spacing: 0.22em;
    padding: 18px;
    border-radius: 18px;
    background: rgba(108, 141, 255, 0.14);
    border: 1px solid rgba(108, 141, 255, 0.28);
}

.answer {
    display: grid;
    gap: 12px;
}

.answer__label {
    font-size: 14px;
    color: var(--muted);
}

.answer__controls {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 12px;
}

.answer__controls input {
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(12, 18, 34, 0.84);
    color: var(--fg);
    padding: 12px 16px;
    font-size: 18px;
}

.primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    border: none;
    color: var(--fg);
    border-radius: 999px;
    padding: 12px 24px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s ease, box-shadow 0.2s ease;
}

.primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(108, 141, 255, 0.3);
}

.ghost {
    border-radius: 999px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--fg);
    padding: 12px 24px;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.ghost:hover {
    border-color: var(--accent);
}

.feedback {
    min-height: 32px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
}

.feedback--success {
    color: var(--success);
}

.feedback--error {
    color: var(--danger);
}

.hud {
    padding: 18px;
    border-radius: 18px;
    background: var(--hud);
    border: 1px solid var(--border);
    display: grid;
    gap: 14px;
    text-align: center;
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(9, 12, 24, 0.82);
    display: grid;
    place-items: center;
    padding: 32px;
}

.overlay.hidden {
    display: none;
}

.overlay__inner {
    padding: 32px;
    border-radius: 20px;
    background: rgba(18, 24, 44, 0.92);
    border: 1px solid var(--border);
    display: grid;
    gap: 16px;
    text-align: center;
}

@media (max-width: 680px) {
    body {
        padding: 16px;
    }

    .masthead__stats {
        flex-direction: column;
        gap: 12px;
    }

    .answer__controls {
        grid-template-columns: 1fr;
    }
}