/* ═══════════════════════════════════════════════════════
   水墨国风 · 技能五子棋
   Ink-Wash Chinese Style for Skills Gomoku
   ═══════════════════════════════════════════════════════ */

:root {
    /* 墨色系 */
    --ink-deep: #2c2c2c;
    --ink-medium: #3a3a3a;
    --ink-light: #5a5a5a;
    --ink-wash: #8a8070;
    --ink-faint: #b0a898;

    /* 宣纸色系 */
    --paper-white: #f8f4ec;
    --paper-warm: #f5f0e8;
    --paper-mid: #ede5d8;
    --paper-dark: #e0d8c8;

    /* 朱红/印章 */
    --vermillion: #c23a2b;
    --vermillion-dark: #a02e22;
    --vermillion-light: #d95548;

    /* 黛青 */
    --cyan-dark: #4a6670;
    --cyan-medium: #5d7d88;
    --cyan-light: #7a9aa5;

    /* 藤黄 */
    --gamboge: #d4a843;
    --gamboge-light: #e0be6a;

    /* 棋盘 */
    --board-bg: #e8dcc8;
    --board-line: #8B7355;
    --board-line-light: #a89878;

    /* 字体 */
--font-calligraphy: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
--font-body: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background:
        /* 微妙纸张纹理 */
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E"),
        linear-gradient(160deg, var(--paper-warm) 0%, var(--paper-mid) 40%, var(--paper-dark) 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--ink-medium);
}

/* ─── 容器 ─── */
.container {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

/* ─── 标题 ─── */
h1 {
    text-align: center;
    color: var(--ink-deep);
    font-family: var(--font-calligraphy);
    font-size: 2.8em;
    margin-bottom: 30px;
    letter-spacing: 0.15em;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
    position: relative;
}

h1::before,
h1::after {
    content: '';
    display: inline-block;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--ink-wash), transparent);
    vertical-align: middle;
    margin: 0 16px;
}

/* ─── 顶部控制按钮（印章/古钱币样式） ─── */
.top-right-controls {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 12px;
    z-index: 1000;
}

.icon-btn {
    width: 48px;
    height: 48px;
    border-radius: 6px;
    background: var(--paper-white);
    border: 2px solid var(--ink-wash);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.08),
        inset 0 0 0 1px rgba(255, 255, 255, 0.5);
    position: relative;
}

.icon-btn:hover {
    background: var(--vermillion);
    border-color: var(--vermillion-dark);
    color: white;
    transform: scale(1.08);
    box-shadow: 0 4px 16px rgba(194, 58, 43, 0.3);
}

.icon-btn svg {
    width: 24px;
    height: 24px;
    color: var(--ink-light);
    transition: color 0.3s ease;
}

.icon-btn:hover svg {
    color: white;
}

.info-icon {
    font-size: 22px;
    font-weight: bold;
    color: var(--ink-light);
    line-height: 1;
    font-family: var(--font-calligraphy);
    transition: color 0.3s ease;
}

.icon-btn:hover .info-icon {
    color: white;
}

/* 悬停提示文字 */
.icon-btn::after {
    content: attr(title);
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    padding: 6px 14px;
    background: var(--ink-deep);
    color: var(--paper-white);
    font-size: 13px;
    font-family: var(--font-body);
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1001;
    letter-spacing: 0.05em;
}

.icon-btn:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateY(-4px);
}

/* ─── 状态栏（匾额样式） ─── */
.status {
    text-align: center;
    font-size: 1.6em;
    font-weight: bold;
    font-family: var(--font-calligraphy);
    color: var(--paper-white);
    margin-bottom: 15px;
    padding: 12px 30px;
    background: linear-gradient(135deg, var(--ink-deep) 0%, #3a3530 100%);
    border-radius: 4px;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    letter-spacing: 0.2em;
    position: relative;
    overflow: hidden;
}

.status::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gamboge), transparent);
}

/* ─── 游戏信息区 ─── */
.game-info {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

/* ─── 玩家信息（卷轴样式） ─── */
.player-info {
    flex: 1;
    background: var(--paper-white);
    border-radius: 8px;
    padding: 20px;
    border: 1px solid var(--paper-dark);
    box-shadow:
        0 4px 16px rgba(0, 0, 0, 0.06),
        inset 0 0 20px rgba(139, 115, 85, 0.03);
    transition: all 0.4s ease;
    position: relative;
}

/* 卷轴顶部装饰线 */
.player-info::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    right: 20px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--ink-faint), transparent);
    border-radius: 0 0 2px 2px;
}

.player-info h3 {
    margin-bottom: 15px;
    font-size: 1.2em;
    font-family: var(--font-calligraphy);
    color: var(--ink-deep);
    letter-spacing: 0.1em;
}

.player-info:not(.active) {
    opacity: 0.55;
    transform: scale(0.98);
    filter: saturate(0.6);
}

.player-info.active {
    border: 2px solid var(--vermillion);
    box-shadow:
        0 0 20px rgba(194, 58, 43, 0.15),
        0 4px 20px rgba(0, 0, 0, 0.08);
    background: linear-gradient(180deg, var(--paper-white) 0%, #fdf6f0 100%);
    transform: scale(1.02);
    animation: scroll-glow 2.5s ease-in-out infinite;
}

.player-info.active::before {
    background: linear-gradient(90deg, transparent, var(--vermillion), transparent);
}

@keyframes scroll-glow {
    0%, 100% {
        box-shadow:
            0 0 20px rgba(194, 58, 43, 0.15),
            0 4px 20px rgba(0, 0, 0, 0.08);
    }
    50% {
        box-shadow:
            0 0 30px rgba(194, 58, 43, 0.25),
            0 4px 20px rgba(0, 0, 0, 0.08);
    }
}

/* ─── 技能按钮（印章/匾额样式） ─── */
.skills {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.skill-btn {
    padding: 12px 15px;
    border: 1.5px solid var(--ink-wash);
    border-radius: 4px;
    background: var(--paper-white);
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    font-family: var(--font-body);
    color: var(--ink-medium);
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
    letter-spacing: 0.08em;
    position: relative;
    overflow: hidden;
}

.skill-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--ink-faint);
    transition: background 0.3s ease;
}

.skill-btn:hover:not(:disabled) {
    background: var(--paper-mid);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: var(--ink-light);
}

.skill-btn:hover:not(:disabled)::before {
    background: var(--ink-light);
}

.skill-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--paper-mid);
    color: var(--ink-faint);
    filter: grayscale(0.3);
}

/* 技能激活状态（朱红印章） */
.skill-btn.active {
    background: var(--vermillion);
    color: var(--paper-white);
    border-color: var(--vermillion-dark);
    box-shadow:
        0 2px 12px rgba(194, 58, 43, 0.3),
        inset 0 0 10px rgba(0, 0, 0, 0.1);
}

.skill-btn.active::before {
    background: rgba(255, 255, 255, 0.3);
}

/* 终极技能（御赐/圣旨感） */
.skill-btn.ultimate {
    background: linear-gradient(135deg, var(--vermillion) 0%, #a02e22 50%, var(--gamboge) 100%);
    color: var(--paper-white);
    border: 1.5px solid var(--vermillion-dark);
    font-family: var(--font-calligraphy);
    font-size: 15px;
    letter-spacing: 0.15em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.skill-btn.ultimate::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    height: 1px;
}

.skill-btn.ultimate:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--vermillion-light) 0%, var(--vermillion) 50%, var(--gamboge-light) 100%);
    box-shadow: 0 4px 20px rgba(194, 58, 43, 0.4);
    transform: translateY(-2px);
}

.skill-btn.ultimate:disabled {
    background: var(--paper-dark);
    color: var(--ink-faint);
    border-color: var(--ink-faint);
    text-shadow: none;
    filter: grayscale(0.5);
}

/* 冷却标签 */
.cooldown {
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 3px;
    background: var(--cyan-dark);
    color: var(--paper-white);
    font-family: var(--font-body);
    letter-spacing: 0.05em;
}

/* ─── 棋盘容器 ─── */
.board-container {
    flex: 0 0 auto;
}

/* ─── 棋盘（宣纸质感） ─── */
.board {
    display: grid;
    grid-template-columns: repeat(15, 40px);
    grid-template-rows: repeat(15, 40px);
    gap: 0;
    background:
        /* 微妙纸纹 */
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.2' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E"),
        linear-gradient(145deg, #ebe3d3 0%, #e0d6c2 50%, #d8ceb8 100%);
    padding: 20px;
    border-radius: 4px;
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.12),
        0 2px 8px rgba(0, 0, 0, 0.06),
        inset 0 0 40px rgba(139, 115, 85, 0.05);
    position: relative;
    border: 1px solid var(--ink-faint);
}

/* 棋盘水墨边框装饰 */
.board::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border: 1px solid rgba(139, 115, 85, 0.2);
    border-radius: 2px;
    pointer-events: none;
}

.board::after {
    content: '';
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    bottom: 12px;
    border: 1px solid rgba(139, 115, 85, 0.1);
    border-radius: 2px;
    pointer-events: none;
}

.cell {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
}

.cell::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 1px;
    background: var(--board-line);
    top: 50%;
    left: 0;
    opacity: 0.6;
}

.cell::after {
    content: '';
    position: absolute;
    height: 100%;
    width: 1px;
    background: var(--board-line);
    left: 50%;
    top: 0;
    opacity: 0.6;
}

.cell:hover .hover-indicator {
    display: block;
}

.cell.skill-target {
    background: rgba(194, 58, 43, 0.12);
    cursor: crosshair;
}

.cell.skill-target:hover {
    background: rgba(194, 58, 43, 0.25);
}

.hover-indicator {
    display: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(90, 80, 60, 0.25);
    position: absolute;
    z-index: 1;
}

/* ─── 棋子 ─── */
.piece {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    position: relative;
    z-index: 2;
}

/* 黑棋：水墨晕染效果 */
.piece.black {
    background: radial-gradient(circle at 35% 30%,
        #5a5550 0%,
        #3a3835 30%,
        #2c2c2c 60%,
        #1a1a1a 100%);
    box-shadow:
        2px 3px 6px rgba(0, 0, 0, 0.35),
        inset 0 -2px 4px rgba(0, 0, 0, 0.3),
        inset 0 2px 4px rgba(255, 255, 255, 0.08);
}

/* 白棋：温润玉石感 */
.piece.white {
    background: radial-gradient(circle at 35% 30%,
        #ffffff 0%,
        #f5f2ee 30%,
        #e8e2da 60%,
        #d8d0c5 100%);
    box-shadow:
        2px 3px 6px rgba(0, 0, 0, 0.2),
        inset 0 -2px 4px rgba(0, 0, 0, 0.06),
        inset 0 2px 6px rgba(255, 255, 255, 0.8);
}

/* ─── 力拔山兮特效 ─── */
.board.shaking {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-10px) translateY(-5px);
    }
    20%, 40%, 80% {
        transform: translateX(10px) translateY(5px);
    }
}

.piece.exploding {
    animation: explode 0.8s ease-out forwards;
}

@keyframes explode {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(var(--dx), var(--dy)) scale(1.5);
        opacity: 0.8;
    }
    100% {
        transform: translate(calc(var(--dx) * 2), calc(var(--dy) * 2)) scale(0);
        opacity: 0;
    }
}

.board.resetting {
    animation: reset 0.5s ease-in;
}

@keyframes reset {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ─── 弹窗样式 ─── */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(44, 44, 44, 0.5);
    backdrop-filter: blur(6px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--paper-white);
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(139, 115, 85, 0.15);
    animation: modalSlideIn 0.3s ease;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* 弹窗水墨云纹装饰 */
.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--ink-faint) 20%,
        var(--ink-wash) 50%,
        var(--ink-faint) 80%,
        transparent 100%);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 28px 36px 18px 36px;
    border-bottom: 1px solid var(--paper-dark);
}

.modal-header h2 {
    margin: 0;
    color: var(--ink-deep);
    font-family: var(--font-calligraphy);
    font-size: 26px;
    letter-spacing: 0.1em;
}

.close-btn {
    font-size: 32px;
    font-weight: bold;
    color: var(--ink-wash);
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
    padding: 5px;
}

.close-btn:hover {
    color: var(--vermillion);
    transform: rotate(90deg);
}

.modal-body {
    padding: 20px 36px 36px 36px;
}

.modal-body h3 {
    margin: 20px 0 10px 0;
    color: var(--ink-deep);
    font-size: 18px;
    font-family: var(--font-calligraphy);
    letter-spacing: 0.08em;
}

.modal-body ul {
    list-style: none;
    padding: 0;
}

.modal-body li {
    padding: 8px 0;
    color: var(--ink-light);
    line-height: 1.7;
    font-size: 15px;
    border-bottom: 1px solid rgba(139, 115, 85, 0.08);
}

.modal-body li:last-child {
    border-bottom: none;
}

.modal-body strong {
    color: var(--vermillion);
}

/* 小型弹窗 */
.modal-small {
    max-width: 420px;
}

/* 确认消息 */
.confirm-message {
    font-size: 15px;
    color: var(--ink-light);
    text-align: center;
    margin: 20px 0;
    line-height: 1.7;
    letter-spacing: 0.03em;
}

/* 弹窗按钮 */
.modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 28px;
}

.modal-btn {
    padding: 12px 30px;
    font-size: 15px;
    font-weight: bold;
    font-family: var(--font-body);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 100px;
    letter-spacing: 0.08em;
}

.modal-btn-cancel {
    background: var(--paper-mid);
    color: var(--ink-light);
    border: 1px solid var(--ink-faint);
}

.modal-btn-cancel:hover {
    background: var(--paper-dark);
    transform: translateY(-2px);
}

.modal-btn-confirm {
    background: linear-gradient(135deg, var(--ink-deep) 0%, #3a3530 100%);
    color: var(--paper-white);
}

.modal-btn-confirm:hover {
    background: linear-gradient(135deg, #3a3530 0%, var(--ink-deep) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ─── 模式选择弹窗 ─── */
.mode-select-message {
    font-size: 17px;
    color: var(--ink-light);
    text-align: center;
    margin: 20px 0 30px 0;
    line-height: 1.7;
    font-family: var(--font-body);
    letter-spacing: 0.05em;
}

.mode-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 20px;
}

.mode-btn {
    flex: 1;
    max-width: 250px;
    padding: 28px 20px;
    border: 1.5px solid var(--ink-faint);
    border-radius: 6px;
    background: var(--paper-white);
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    font-family: var(--font-body);
    color: var(--ink-medium);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.mode-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--ink-faint);
    transition: background 0.3s ease;
}

.mode-btn:hover {
    background: linear-gradient(180deg, var(--paper-white) 0%, #fdf6f0 100%);
    border-color: var(--vermillion);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(194, 58, 43, 0.15);
}

.mode-btn:hover::before {
    background: var(--vermillion);
}

.mode-icon {
    font-size: 48px;
}

.mode-title {
    font-size: 20px;
    font-weight: bold;
    font-family: var(--font-calligraphy);
    color: var(--ink-deep);
    letter-spacing: 0.1em;
}

.mode-desc {
    font-size: 14px;
    font-weight: normal;
    opacity: 0.7;
    color: var(--ink-light);
}

.mode-btn:hover .mode-desc {
    opacity: 1;
}

/* ─── 响应式布局 ─── */
@media (max-width: 1200px) {
    .game-info {
        flex-direction: column;
    }

    .board {
        grid-template-columns: repeat(15, 32px);
        grid-template-rows: repeat(15, 32px);
    }

    .cell {
        width: 32px;
        height: 32px;
    }

    .piece {
        width: 26px;
        height: 26px;
    }

    .hover-indicator {
        width: 10px;
        height: 10px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2em;
    }

    h1::before,
    h1::after {
        width: 30px;
        margin: 0 8px;
    }

    .status {
        font-size: 1.3em;
        padding: 10px 20px;
    }

    .player-info {
        padding: 15px;
    }

    .skill-btn {
        padding: 10px 12px;
        font-size: 13px;
    }
}