/* Shared layout for standalone game pages */

.game-page-main {
    padding: 2rem 5% 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.game-shell {
    background: var(--light-card-bg);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-strong);
    padding: 2rem;
}

body.dark-theme .game-shell {
    background: var(--dark-card-bg);
    border-color: rgba(255, 255, 255, 0.08);
}

.game-shell h1 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.game-subtitle {
    color: var(--grey-color);
    margin-bottom: 1.5rem;
}

.game-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.game-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.game-controls .btn {
    background: var(--primary-color);
    color: #fff;
    min-height: 44px;
}

.game-controls .btn:hover {
    background: var(--primary-dark);
}

.game-controls label {
    font-weight: 600;
    color: var(--light-text);
}

body.dark-theme .game-controls label {
    color: var(--dark-text);
}

.game-controls select {
    border: 1px solid var(--light-grey);
    border-radius: 10px;
    padding: 0.45rem 0.75rem;
    background: var(--light-card-bg);
    color: var(--light-text);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

body.dark-theme .game-controls select {
    border-color: rgba(255, 255, 255, 0.15);
    background: var(--dark-bg);
    color: var(--dark-text);
}

.game-options {
    margin-bottom: 1rem;
    padding: 0.85rem 1rem;
    border: 1px solid rgba(108, 92, 231, 0.14);
    border-radius: var(--border-radius-md);
    background: rgba(108, 92, 231, 0.04);
}

.game-options summary {
    cursor: pointer;
    color: var(--primary-dark);
    font-weight: 800;
    min-height: 32px;
}

body.dark-theme .game-options summary {
    color: var(--primary-light);
}

.game-options[open] summary {
    margin-bottom: 0.8rem;
}

body.dark-theme .game-options {
    border-color: rgba(162, 155, 254, 0.18);
    background: rgba(162, 155, 254, 0.06);
}

.option-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem 1rem;
    align-items: center;
}

.option-group + .option-group {
    margin-top: 0.75rem;
}

.option-group label {
    display: inline-flex;
    gap: 0.4rem;
    align-items: center;
    color: var(--light-text);
    font-weight: 600;
}

body.dark-theme .option-group label {
    color: var(--dark-text);
}

.option-group input[type="checkbox"] {
    width: 1.15rem;
    height: 1.15rem;
    accent-color: var(--primary-color);
}

.option-group select {
    min-height: 42px;
    padding: 0.4rem 0.7rem;
    border: 1px solid var(--light-grey);
    border-radius: 8px;
    background: var(--light-card-bg);
    color: var(--light-text);
}

body.dark-theme .option-group select {
    border-color: rgba(255, 255, 255, 0.18);
    background: var(--dark-bg);
    color: var(--dark-text);
}

.game-status {
    font-weight: 600;
    color: var(--primary-color);
}

body.dark-theme .game-status {
    color: var(--primary-light);
}

.game-hud {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    color: var(--grey-color);
    font-weight: 700;
}

.game-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 900px) {
    .game-grid.two-col {
        grid-template-columns: 1fr 360px;
        align-items: start;
    }
}

.game-panel {
    background: rgba(108, 92, 231, 0.04);
    border: 1px solid rgba(108, 92, 231, 0.12);
    border-radius: var(--border-radius-md);
    padding: 1rem;
    min-width: 0;
}

.howto-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.howto {
    list-style: disc;
    padding-left: 1.2rem;
    color: var(--grey-color);
    line-height: 1.8;
}

.howto li {
    margin: 0.35rem 0;
}

body.dark-theme .game-panel {
    background: rgba(162, 155, 254, 0.07);
    border-color: rgba(162, 155, 254, 0.18);
}

/* Tic Tac Toe */
.ttt-board {
    display: grid;
    grid-template-columns: repeat(3, minmax(72px, 1fr));
    gap: 0.75rem;
    max-width: 420px;
    margin: 0 auto;
}

.ttt-cell {
    appearance: none;
    border: 2px solid rgba(108, 92, 231, 0.25);
    background: var(--light-card-bg);
    border-radius: 14px;
    min-height: 92px;
    font-size: 2.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--light-text);
}

body.dark-theme .ttt-cell {
    background: var(--dark-bg);
    color: var(--dark-text);
    border-color: rgba(162, 155, 254, 0.25);
}

.ttt-cell:hover {
    transform: translateY(-2px);
    border-color: rgba(108, 92, 231, 0.55);
}

.ttt-cell:disabled {
    cursor: not-allowed;
    opacity: 0.85;
}

.ttt-cell:focus-visible {
    outline: 3px solid rgba(108, 92, 231, 0.25);
    outline-offset: 3px;
}

.ttt-cell.win {
    background: rgba(0, 184, 148, 0.12);
    border-color: rgba(0, 184, 148, 0.55);
}

/* Snake */
.snake-wrap {
    display: grid;
    place-items: center;
    gap: 1rem;
}

.snake-canvas {
    width: min(520px, 100%);
    height: auto;
    border-radius: 16px;
    border: 2px solid rgba(108, 92, 231, 0.25);
    background: rgba(0, 0, 0, 0.03);
}

body.dark-theme .snake-canvas {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(162, 155, 254, 0.25);
}

.snake-hud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    align-items: center;
    justify-content: center;
    color: var(--grey-color);
    font-weight: 600;
}

.snake-control-hint {
    margin-bottom: 0;
    text-align: center;
}

.snake-dpad {
    display: grid;
    grid-template-columns: 56px 56px 56px;
    grid-template-rows: 56px 56px 56px;
    gap: 0.5rem;
}

.snake-dpad button {
    appearance: none;
    border: 1px solid rgba(108, 92, 231, 0.25);
    background: var(--light-card-bg);
    border-radius: 14px;
    cursor: pointer;
    transition: var(--transition-fast);
}

body.dark-theme .snake-dpad button {
    background: var(--dark-bg);
    border-color: rgba(162, 155, 254, 0.25);
}

.snake-dpad button:hover {
    transform: translateY(-1px);
    border-color: rgba(108, 92, 231, 0.55);
}

.snake-dpad button:focus-visible {
    outline: 3px solid rgba(108, 92, 231, 0.25);
    outline-offset: 3px;
}

.snake-dpad .up { grid-column: 2; grid-row: 1; }
.snake-dpad .left { grid-column: 1; grid-row: 2; }
.snake-dpad .down { grid-column: 2; grid-row: 3; }
.snake-dpad .right { grid-column: 3; grid-row: 2; }

@media (max-width: 600px) {
    .game-page-main {
        padding: 1.5rem 1rem 2.5rem;
    }

    .game-shell {
        padding: 1.15rem;
        border-radius: 16px;
    }

    .game-shell h1 {
        font-size: clamp(1.75rem, 9vw, 2.15rem);
    }

    .game-subtitle {
        margin-bottom: 1rem;
        font-size: 0.98rem;
    }

    .game-toolbar {
        align-items: stretch;
        margin-bottom: 1rem;
    }

    .game-controls {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
        gap: 0.65rem;
    }

    .game-controls > label {
        align-self: center;
    }

    .game-controls .btn,
    .game-controls select {
        width: 100%;
    }

    .game-status {
        width: 100%;
        min-height: 1.5em;
        text-align: left;
    }

    .game-panel {
        padding: 0.8rem;
    }

    .option-group {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.45rem 0.65rem;
    }

    .option-group label {
        min-height: 36px;
        font-size: 0.9rem;
        line-height: 1.35;
    }

    .option-group:last-child {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .snake-canvas {
        width: min(270px, 100%);
    }

    .snake-dpad {
        grid-template-columns: repeat(3, 48px);
        grid-template-rows: repeat(3, 48px);
        gap: 0.35rem;
    }

    .ttt-board {
        gap: 0.55rem;
    }

    .ttt-cell {
        min-height: 78px;
        border-radius: 12px;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    .game-page-main {
        padding: 1rem 3% 2rem;
    }

    .game-shell {
        padding: 1.25rem;
    }

    .game-shell h1 {
        font-size: 1.75rem;
    }

    .game-subtitle,
    .game-toolbar {
        margin-bottom: 0.85rem;
    }
}

/* 桌面端：压缩纵向留白，并让棋盘/画布受视口高度约束，使主视图一屏可见 */
@media (min-width: 900px) {
    .game-page-main {
        padding: 1.25rem 5% 2rem;
    }

    .game-shell {
        padding: 1.25rem 2rem 1.5rem;
    }

    .game-shell h1 {
        font-size: 1.6rem;
    }

    .game-subtitle {
        margin-bottom: 1rem;
    }

    .game-toolbar {
        margin-bottom: 0.9rem;
    }

    .game-options {
        margin-bottom: 0.75rem;
    }

    /* canvas 为替换元素：max-width + max-height 同时约束时自动保持宽高比 */
    .snake-canvas {
        width: auto;
        max-width: min(520px, 100%);
        max-height: max(320px, calc(100vh - 22rem));
    }

    .g2048-board {
        width: min(520px, 100%, max(320px, calc(100vh - 26rem)));
    }
}

/* 键鼠环境无需触屏方向键，方向操作交给键盘 */
@media (min-width: 900px) and (hover: hover) and (pointer: fine) {
    .snake-dpad {
        display: none;
    }
}