:root {
    color-scheme: dark;
    --bg: #101114;
    --panel: rgba(27, 30, 36, 0.88);
    --panel-strong: #20242b;
    --text: #f5f7fb;
    --muted: #a9b0bd;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #a7f06f;
    --accent-2: #5cc8ff;
    --warn: #ffcf5a;
    --shadow: 0 22px 80px rgba(0, 0, 0, 0.38);
    --overlay-alpha: 0.78;
    --overlay-scale: 1;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(92, 200, 255, 0.18), transparent 34rem),
        linear-gradient(135deg, #101114 0%, #181b20 48%, #11151a 100%);
    color: var(--text);
    letter-spacing: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

.auth-shell,
.dashboard-shell {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(0, 1.04fr) minmax(340px, 0.8fr);
    align-items: center;
    gap: 28px;
}

.auth-panel,
.preview-panel,
.control-panel,
.status-panel,
.rules-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.auth-panel {
    padding: clamp(28px, 5vw, 58px);
}

.brand-row {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    font-weight: 750;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: var(--accent);
    color: #101114;
}

.brand-mark::before {
    content: "7";
}

h1 {
    max-width: 760px;
    margin: 28px 0 18px;
    font-size: clamp(2.4rem, 6vw, 5rem);
    line-height: 0.95;
    letter-spacing: 0;
}

p {
    line-height: 1.65;
}

.auth-panel p,
.muted {
    color: var(--muted);
}

.primary-button,
.secondary-button,
.icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    border: 0;
    border-radius: 8px;
    font: inherit;
    font-weight: 750;
    cursor: pointer;
}

.primary-button {
    gap: 14px;
    margin-top: 24px;
    padding: 0 20px;
    background: var(--accent);
    color: #101114;
}

.secondary-button {
    width: fit-content;
    padding: 0 18px;
    background: var(--accent-2);
    color: #071016;
}

.preview-panel {
    position: relative;
    overflow: hidden;
    padding: 22px;
    min-height: 420px;
}

.mini-topbar {
    display: flex;
    gap: 8px;
}

.mini-topbar span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--line);
}

.preview-word {
    margin: 72px 0 28px;
    min-height: 58px;
    font-size: clamp(1.6rem, 4vw, 2.7rem);
    font-weight: 750;
    letter-spacing: 0.16em;
    transition: transform 0.2s ease, color 0.2s ease;
}

.preview-notice {
    position: absolute;
    top: 58px;
    right: 22px;
    max-width: calc(100% - 44px);
    padding: 10px 12px;
    border-radius: 8px;
    background: rgba(167, 240, 111, 0.14);
    border: 1px solid rgba(167, 240, 111, 0.34);
    color: var(--accent);
    font-weight: 750;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.preview-notice.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.preview-meta,
.game-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.preview-meta span,
.game-stats span {
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--muted);
}

.preview-board {
    margin-top: 38px;
    display: grid;
    gap: 10px;
}

.preview-board div {
    display: grid;
    grid-template-columns: 32px 1fr 32px;
    align-items: center;
    padding: 14px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 8px;
}

.preview-medal,
.rank-medal {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: inline-block;
    border: 2px solid rgba(255, 255, 255, 0.22);
    box-shadow: inset 0 0 0 4px rgba(0, 0, 0, 0.18);
}

.preview-medal-1,
.rank-medal-1 {
    background: linear-gradient(135deg, #fff0a6, #d59a28);
}

.preview-medal-2,
.rank-medal-2 {
    background: linear-gradient(135deg, #f3f7fb, #9fa9b7);
}

.preview-medal-3,
.rank-medal-3 {
    background: linear-gradient(135deg, #f2bf8b, #a8642d);
}

.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 0;
}

.user-chip {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--muted);
}

.language-picker {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-weight: 650;
}

.language-picker select {
    height: 38px;
    padding: 0 12px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: var(--panel-strong);
    color: var(--text);
    font: inherit;
}

.user-chip img {
    width: 34px;
    height: 34px;
    border-radius: 50%;
}

.logout-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 36px;
    padding: 0 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    font-weight: 750;
}

.logout-button svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
    gap: 18px;
}

.control-panel,
.status-panel,
.rules-panel {
    padding: 26px;
}

.control-panel {
    grid-row: span 2;
}

.control-panel h1 {
    font-size: clamp(2rem, 4vw, 3.7rem);
}

.eyebrow {
    margin: 0;
    color: var(--accent);
    text-transform: uppercase;
    font-size: 0.78rem;
    font-weight: 750;
}

.copy-row {
    display: grid;
    grid-template-columns: 1fr 48px;
    gap: 10px;
    margin: 28px 0 14px;
}

.overlay-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 18px 0;
}

.overlay-controls label {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 12px;
    min-height: 54px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 650;
}

.overlay-controls input[type="color"] {
    width: 42px;
    height: 32px;
    padding: 0;
    border: 0;
    border-radius: 8px;
    background: transparent;
}

.overlay-controls input[type="range"] {
    width: 120px;
    accent-color: var(--accent);
}

.overlay-controls b {
    color: var(--text);
}

.toggle-row input {
    width: 42px;
    height: 24px;
    accent-color: var(--accent);
}

.copy-row input {
    min-width: 0;
    height: 48px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #111419;
    color: var(--text);
    font: inherit;
}

.icon-button {
    background: var(--panel-strong);
    color: var(--text);
    border: 1px solid var(--line);
}

.status-line {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 24px 0 10px;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--warn);
    box-shadow: 0 0 0 6px rgba(255, 207, 90, 0.12);
}

.status-line.is-connected .status-dot {
    background: #62e875;
    box-shadow: 0 0 0 6px rgba(98, 232, 117, 0.14);
}

.rules-panel ul {
    padding-left: 19px;
    color: var(--muted);
    line-height: 1.7;
}

.parameter-panel code {
    color: var(--accent);
    font-weight: 750;
}

.overlay-body {
    overflow: hidden;
    background: transparent;
}

.overlay-shell {
    min-height: 100vh;
    padding: 54px;
    display: grid;
    align-content: start;
    justify-items: center;
    gap: 20px;
    background: transparent;
    transform: scale(var(--overlay-scale));
    transform-origin: top center;
}

.game-box,
.leaderboard {
    width: min(980px, calc(100vw - 80px));
    background: rgba(14, 16, 20, var(--overlay-alpha));
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 8px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.game-box {
    padding: 30px 34px;
    min-height: 282px;
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.game-box.is-hidden {
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
}

.overlay-header {
    display: flex;
    justify-content: center;
    gap: 18px;
    color: var(--muted);
    font-weight: 750;
    text-transform: uppercase;
    font-size: 0.82rem;
}

.game-word {
    min-height: 142px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-wrap: anywhere;
    padding: 24px 0;
    color: var(--text);
    font-size: clamp(2rem, 6vw, 5.7rem);
    font-weight: 750;
    letter-spacing: 0.12em;
    text-align: center;
    line-height: 1.12;
    max-width: 100%;
}

.leaderboard {
    padding: 30px 34px;
    min-height: 282px;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.leaderboard-full {
    position: absolute;
    top: 54px;
}

.leaderboard.is-hidden {
    opacity: 0;
    transform: translateY(-8px);
}

.leaderboard-title {
    color: var(--accent);
    font-size: 0.86rem;
    font-weight: 750;
    text-transform: uppercase;
}

.winner {
    margin-top: 8px;
    font-size: 1.35rem;
    font-weight: 750;
}

.leaderboard ol {
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 8px;
}

.leaderboard li {
    display: grid;
    grid-template-columns: 38px minmax(28px, auto) 1fr 52px;
    align-items: center;
    gap: 14px;
    padding: 15px 16px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
}

.rank-badges {
    display: flex;
    align-items: center;
    gap: 5px;
    min-width: 28px;
}

.rank-badge {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.rank-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 1.28rem;
    font-weight: 800;
}

.rank-medal-empty {
    background: rgba(255, 255, 255, 0.08);
}

@media (max-width: 820px) {
    .auth-shell,
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .auth-shell {
        padding: 30px 0;
    }

    .top-nav {
        align-items: flex-start;
        gap: 20px;
        flex-direction: column;
    }

    .overlay-shell {
        padding: 22px;
    }

    .game-box,
    .leaderboard {
        width: calc(100vw - 44px);
    }

    .overlay-header {
        flex-direction: column;
    }

    .overlay-controls {
        grid-template-columns: 1fr;
    }

    .leaderboard-full {
        top: 22px;
    }
}