body {
    min-height: 100vh;
    background: var(--cp-bg);
    color: var(--cp-text);
    font-family: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, sans-serif;
}

.game-container {
    max-width: 1280px;
}

.header,
.mode-selection,
.setup-screen,
.room-lobby,
.waiting-room,
.game-area {
    background: var(--cp-surface);
    color: var(--cp-text);
    border: 1px solid var(--cp-border);
    box-shadow: 0 0 2px var(--cp-border), 0 1px 2px var(--cp-border);
}

.header h1,
.mode-selection h2,
.room-lobby h2,
.setup-screen h2 {
    color: var(--cp-accent);
}

.breadcrumb,
.breadcrumb-separator,
.setup-note,
.opponent-name {
    color: var(--cp-text-muted);
}

.breadcrumb a {
    color: var(--cp-link);
}

.back-btn,
.btn-secondary {
    background: var(--cp-surface);
    border-color: var(--cp-border);
    color: var(--cp-text);
}

button {
    min-height: 44px;
    border-radius: 0.625rem;
    background: var(--cp-accent);
    color: var(--cp-accent-fg);
}

button:hover:not(:disabled) {
    background: var(--cp-accent-hover);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--cp-link);
    outline-offset: 3px;
    box-shadow: none;
}

input,
select,
.lobby-input {
    background: var(--cp-surface);
    border-color: var(--cp-border-strong);
    color: var(--cp-text);
}

.mode-selection {
    max-width: 480px;
}

.mode-btn {
    background: var(--cp-surface-soft);
    border-color: var(--cp-border);
    color: var(--cp-text);
}

.mode-btn:hover {
    border-color: var(--cp-accent);
    background: var(--cp-accent);
    color: var(--cp-accent-fg);
}

.mode-btn .desc,
.waiting-text,
.players-list .player-status {
    color: var(--cp-text-muted);
}

.mode-btn:hover .desc {
    color: var(--cp-accent-fg);
}

.how-to-play {
    width: 100%;
    border: 1px solid var(--cp-border);
    border-radius: 0.625rem;
    background: var(--cp-bg-elevated);
}

.how-to-play summary {
    min-height: 44px;
    padding: 12px 16px;
    color: var(--cp-accent);
    cursor: pointer;
    font-weight: 700;
}

.how-to-play-content {
    padding: 0 18px 18px;
    text-align: left;
}

.how-to-play-content h3 {
    margin-top: 12px;
    font-size: 1rem;
}

.how-to-play-content p {
    margin-top: 4px;
    color: var(--cp-text-muted);
}

.setup-screen {
    max-width: 480px;
    max-height: 85vh;
    margin: 20px auto;
    padding: 32px;
    overflow-y: auto;
    border-radius: 16px;
    text-align: center;
}

.setup-note {
    margin: 0 0 18px;
}

#back-to-modes-from-setup,
#back-to-modes {
    margin-top: 12px;
}

.room-lobby .lobby-tab {
    background: var(--cp-surface);
    color: var(--cp-text-muted);
}

.room-lobby .lobby-tab.active {
    border-bottom-color: var(--cp-accent);
    color: var(--cp-accent);
}

.connection-status {
    background: var(--cp-surface-soft);
    border: 1px solid var(--cp-border);
}

.connection-status.connected .status-dot {
    background: var(--cp-success);
}

.connection-status.connecting .status-dot {
    background: var(--cp-warning);
}

.connection-status.disconnected .status-dot {
    background: var(--cp-danger);
}

.room-code-display,
.players-list li {
    background: var(--cp-surface-soft);
    color: var(--cp-text);
}

.room-code-display {
    color: var(--cp-accent);
    font-family: Consolas, "Courier New", Courier, monospace;
}

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

.game-area {
    padding: 24px;
    border-radius: 16px;
}

.online-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
}

.online-badge {
    padding: 4px 10px;
    border-radius: 0.625rem;
    background: var(--cp-accent);
    color: var(--cp-accent-fg);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.race-heading-row,
.board-card-heading,
.score-row,
.race-tools {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.eyebrow,
.board-kicker {
    color: var(--cp-text-muted);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.race-heading-row h2,
.board-card-heading h3 {
    margin: 0;
    color: var(--cp-text);
}

.round-label,
.remaining-count {
    flex: 0 0 auto;
    padding: 6px 10px;
    border: 1px solid var(--cp-border);
    border-radius: 0.625rem;
    background: var(--cp-surface-soft);
    color: var(--cp-text-muted);
    font-weight: 700;
}

.turn-indicator {
    margin-top: 14px;
    border-color: var(--cp-border);
    background: var(--cp-surface-soft);
    color: var(--cp-text);
}

.turn-indicator.my-turn {
    border-color: var(--cp-success);
}

.turn-indicator.waiting {
    border-color: var(--cp-warning);
}

.status {
    min-height: 1.7em;
    margin: 12px 0;
    color: var(--cp-accent);
    font-weight: 700;
    text-align: center;
}

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

.score-card {
    padding: 12px 16px;
    border: 1px solid var(--cp-border);
    border-radius: 0.625rem;
    background: var(--cp-bg-elevated);
}

.score-card.you {
    border-inline-start: 6px solid var(--cp-accent);
}

.score-card.opponent {
    border-inline-start: 6px double var(--cp-border-strong);
}

.score-card.winner {
    border-color: var(--cp-success);
}

.score-name {
    min-width: 0;
    overflow: hidden;
    color: var(--cp-text);
    font-weight: 800;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.score-value {
    color: var(--cp-accent);
    font-family: Consolas, "Courier New", Courier, monospace;
    font-size: 1.35rem;
    font-weight: 800;
}

.score-meta {
    margin-top: 4px;
    color: var(--cp-text-muted);
    font-size: 0.84rem;
}

.race-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
    gap: 16px;
    align-items: start;
}

.board-card {
    min-width: 0;
    padding: 16px;
    overflow: hidden;
    border: 1px solid var(--cp-border);
    border-radius: 16px;
    background: var(--cp-bg-elevated);
}

.mahjong-board {
    --tile-size: clamp(43px, 6vw, 68px);
    --tile-step-x: calc(var(--tile-size) * 0.88);
    --tile-step-y: calc(var(--tile-size) * 0.76);
    position: relative;
    width: calc(var(--tile-step-x) * 7 + var(--tile-size) + 24px);
    height: calc(var(--tile-step-y) * 5 + var(--tile-size) + 28px);
    max-width: 100%;
    margin: 20px auto 6px;
}

.opponent-board {
    --tile-size: clamp(29px, 3.5vw, 42px);
}

.mahjong-tile {
    position: absolute;
    left: calc(var(--tile-x) * var(--tile-step-x) + var(--tile-layer) * 3px);
    top: calc(var(--tile-y) * var(--tile-step-y) - var(--tile-layer) * 4px);
    z-index: calc(10 + var(--tile-layer) * 100 + var(--tile-y-order));
    display: grid;
    grid-template-rows: 1fr auto;
    place-items: center;
    width: var(--tile-size);
    height: calc(var(--tile-size) * 0.86);
    min-height: 0;
    padding: 5px 3px 4px;
    overflow: hidden;
    border: 2px solid var(--cp-border-strong);
    border-inline-start-width: 4px;
    border-radius: 0.625rem;
    background: var(--cp-surface);
    color: var(--cp-text);
    box-shadow: 3px 4px 0 var(--cp-border);
    cursor: pointer;
    transition: transform 140ms ease, opacity 140ms ease, box-shadow 140ms ease;
}

.mahjong-tile::before {
    content: "";
    position: absolute;
    inset: 3px;
    pointer-events: none;
    border: 1px solid var(--cp-border);
    border-radius: calc(0.625rem - 3px);
}

.mahjong-tile.pattern-1::before {
    border-style: dashed;
}

.mahjong-tile.pattern-2::before {
    border-style: double;
    border-width: 3px;
}

.mahjong-tile.pattern-3::before {
    border-block-start-width: 4px;
    border-block-end-style: dotted;
}

.mahjong-tile.pattern-4::before {
    border-inline-end-width: 4px;
    border-block-end-width: 4px;
}

.mahjong-tile.pattern-5::before {
    border-radius: 16px 0.625rem 16px 0.625rem;
}

.mahjong-tile.free:hover,
.mahjong-tile.free:focus-visible {
    z-index: 1000;
    transform: translateY(-4px);
    border-color: var(--cp-accent);
    box-shadow: 3px 7px 0 var(--cp-border);
}

.mahjong-tile.blocked {
    opacity: 0.62;
    cursor: not-allowed;
}

.mahjong-tile.selected {
    z-index: 1001;
    transform: translateY(-6px);
    border-color: var(--cp-accent);
    background: var(--cp-accent-soft);
    box-shadow: 0 0 0 3px var(--cp-highlight), 3px 7px 0 var(--cp-border);
}

.mahjong-tile.hinted {
    border-color: var(--cp-warning);
    box-shadow: 0 0 0 4px var(--cp-highlight), 3px 7px 0 var(--cp-border);
    animation: hintPulse 700ms ease-in-out 3;
}

.mahjong-tile.mismatch {
    border-color: var(--cp-danger);
    animation: mismatchShake 240ms ease-in-out 1;
}

.mahjong-tile.removed {
    visibility: hidden;
    pointer-events: none;
}

.tile-symbol {
    position: relative;
    z-index: 1;
    font-family: "Segoe UI Symbol", "Segoe UI", Aptos, sans-serif;
    font-size: calc(var(--tile-size) * 0.38);
    font-weight: 800;
    line-height: 1;
}

.tile-label {
    position: relative;
    z-index: 1;
    max-width: 100%;
    overflow: hidden;
    font-size: calc(var(--tile-size) * 0.13);
    font-weight: 800;
    letter-spacing: 0.04em;
    line-height: 1;
    text-overflow: ellipsis;
    text-transform: uppercase;
    white-space: nowrap;
}

.opponent-board .mahjong-tile {
    border-width: 1px;
    border-inline-start-width: 3px;
    box-shadow: 2px 2px 0 var(--cp-border);
    cursor: default;
}

.opponent-board .mahjong-tile.blocked,
.opponent-board .mahjong-tile.free {
    opacity: 0.85;
}

.opponent-board .tile-label {
    display: none;
}

.race-tools {
    margin-top: 16px;
    padding: 12px;
    border: 1px solid var(--cp-border);
    border-radius: 0.625rem;
    background: var(--cp-surface-soft);
}

.race-tools p {
    margin: 0;
    color: var(--cp-text-muted);
}

.game-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

@keyframes hintPulse {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

@keyframes mismatchShake {
    0%, 100% { transform: translateX(0); }
    33% { transform: translateX(-4px); }
    66% { transform: translateX(4px); }
}

@media (max-width: 940px) {
    .race-layout {
        grid-template-columns: 1fr;
    }

    .opponent-board {
        --tile-size: clamp(35px, 7vw, 52px);
    }
}

@media (max-width: 620px) {
    .game-container {
        padding: 12px;
    }

    .header {
        align-items: flex-start;
        padding: 16px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .game-area {
        padding: 12px;
    }

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

    .race-heading-row,
    .board-card-heading,
    .race-tools {
        align-items: flex-start;
    }

    .race-tools {
        flex-direction: column;
    }

    .mahjong-board {
        --tile-size: clamp(34px, 11vw, 48px);
        margin-top: 16px;
    }

    .tile-label {
        font-size: calc(var(--tile-size) * 0.14);
    }
}

@media (prefers-reduced-motion: reduce) {
    .mahjong-tile,
    .mahjong-tile.hinted,
    .mahjong-tile.mismatch {
        animation: none;
        transition: none;
    }
}