/* ============ 连连看 · 中国风古字版 ============ */
:root {
    --ll-paper: #f4ecd8;
    --ll-paper-2: #ebe0c6;
    --ll-paper-3: #d9c9a3;
    --ll-ink: #1a1410;
    --ll-ink-2: #3a3024;
    --ll-vermilion: #b91c1c;
    --ll-vermilion-d: #8a1414;
    --ll-jade: #0c4da2;
    --ll-gold: #b8860b;
    --ll-tile: #fdf6e3;
    --ll-tile-line: #c8b88a;
    --ll-tile-sel: #fff4cc;
    --ll-tile-sel-line: #d4a017;
    --ll-shadow: 0 1px 0 rgba(58,48,36,.18), 0 4px 12px rgba(58,48,36,.10);
}

* { box-sizing: border-box; }

html, body {
    margin: 0; padding: 0;
    height: 100vh;
    overflow: hidden;
    overscroll-behavior: none;
    font-family: "Kaiti", "STKaiti", "KaiTi", "STSong", "FangSong", serif;
    color: var(--ll-ink);
    -webkit-tap-highlight-color: transparent;
}

.ll-fullscreen {
    height: 100vh; height: 100dvh;
    display: flex; flex-direction: column;
    background: var(--ll-paper);
    background-image:
      radial-gradient(circle at 20% 10%, rgba(184,134,11,.06) 0, transparent 40%),
      radial-gradient(circle at 80% 80%, rgba(185,28,28,.04) 0, transparent 40%);
}

/* ============ 顶栏 ============ */
.ll-header {
    flex: 0 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid rgba(58,48,36,.18);
    background: rgba(244,236,216,.72);
    backdrop-filter: blur(8px);
}
.ll-back {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--ll-ink-2); text-decoration: none;
    padding: 6px 10px; border-radius: 8px;
    font-size: 15px;
    transition: background .15s;
}
.ll-back:hover { background: rgba(58,48,36,.08); }
.ll-back i { font-size: 18px; }
.ll-title {
    font-size: 19px; font-weight: 700; letter-spacing: 6px;
    color: var(--ll-ink);
    padding-left: 6px;
}
.ll-spacer { width: 60px; }

/* ============ 主体 ============ */
.ll-main {
    flex: 1 1 auto;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 14px 16px 24px;
}
.ll-screen { animation: ll-fade .25s ease; }
.ll-screen.hidden { display: none; }
@keyframes ll-fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; } }

/* ============ 主菜单 · 介绍 ============ */
.ll-intro {
    text-align: center;
    padding: 8px 0 16px;
    position: relative;
}
.ll-seal {
    display: inline-block;
    background: var(--ll-vermilion);
    color: #fff8e7;
    font-size: 14px; letter-spacing: 4px;
    padding: 6px 14px;
    margin-bottom: 12px;
    transform: rotate(-3deg);
    border-radius: 2px;
    box-shadow: 0 2px 6px rgba(185,28,28,.3);
    font-family: "Kaiti", serif;
}
.ll-intro-title {
    margin: 0 0 8px;
    font-size: 32px; font-weight: 800;
    letter-spacing: 8px;
    color: var(--ll-ink);
}
.ll-intro-sub {
    margin: 0;
    color: var(--ll-ink-2);
    font-size: 14px;
}

/* ============ 关卡卡片 ============ */
.ll-levels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    max-width: 720px;
    margin: 0 auto;
}
.ll-level-card {
    background: var(--ll-tile);
    border: 1.5px solid var(--ll-tile-line);
    border-radius: 6px;
    padding: 18px 12px 14px;
    text-align: center;
    cursor: pointer;
    transition: transform .12s, box-shadow .15s, border-color .15s;
    box-shadow: var(--ll-shadow);
    font-family: inherit;
    color: var(--ll-ink);
    position: relative;
}
.ll-level-card:hover {
    transform: translateY(-3px);
    border-color: var(--ll-vermilion);
    box-shadow: 0 6px 16px rgba(185,28,28,.18);
}
.ll-level-card:active { transform: translateY(0); }
.ll-level-num {
    font-size: 38px; font-weight: 700;
    color: var(--ll-vermilion);
    line-height: 1;
    margin-bottom: 6px;
}
.ll-level-name {
    font-size: 18px; font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 6px;
}
.ll-level-meta {
    font-size: 12px;
    color: var(--ll-ink-2);
    margin-bottom: 10px;
}
.ll-level-best {
    font-size: 11px;
    color: var(--ll-gold);
    border-top: 1px dashed var(--ll-tile-line);
    padding-top: 6px;
}
.ll-best { font-weight: 700; }

/* ============ 玩法说明 ============ */
.ll-howto {
    max-width: 720px;
    margin: 24px auto 0;
    padding: 14px 18px;
    background: rgba(255,255,255,.4);
    border-left: 3px solid var(--ll-vermilion);
    border-radius: 0 6px 6px 0;
    font-size: 13px;
    color: var(--ll-ink-2);
    line-height: 1.7;
}
.ll-howto h3 { margin: 0 0 4px; font-size: 14px; color: var(--ll-ink); letter-spacing: 2px; }
.ll-howto p { margin: 0; }
.ll-howto b { color: var(--ll-vermilion); font-weight: 700; }

/* ============ 游戏 HUD ============ */
.ll-hud {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 4px 12px;
    flex-wrap: wrap;
}
.ll-hud-cell {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 6px 12px;
    background: rgba(255,255,255,.55);
    border: 1px solid var(--ll-tile-line);
    border-radius: 18px;
    font-size: 14px;
    font-weight: 600;
    color: var(--ll-ink);
}
.ll-hud-cell i { font-size: 14px; color: var(--ll-ink-2); }
.ll-time-cell.urgent {
    color: var(--ll-vermilion);
    border-color: var(--ll-vermilion);
    animation: pulse .8s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
.ll-hud-btn {
    margin-left: auto;
    background: rgba(255,255,255,.55);
    border: 1px solid var(--ll-tile-line);
    border-radius: 18px;
    padding: 6px 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--ll-ink);
    display: inline-flex; align-items: center; gap: 5px;
    font-family: inherit;
    transition: background .12s;
}
.ll-hud-btn:hover { background: rgba(255,255,255,.85); }
.ll-hud-btn:disabled { opacity: .4; cursor: not-allowed; }
#btnQuit { margin-left: 0; }
#btnHint { margin-left: auto; }

/* ============ 棋盘 ============ */
.ll-board-wrap {
    position: relative;
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    background: var(--ll-paper-2);
    border: 1.5px solid var(--ll-tile-line);
    border-radius: 8px;
    box-shadow: inset 0 0 0 4px var(--ll-paper),
                inset 0 0 0 5px var(--ll-tile-line),
                var(--ll-shadow);
    padding: 6px;
}
#llCanvas {
    display: block;
    width: 100%;
    height: auto;
    touch-action: manipulation;
}
.ll-toast {
    position: absolute;
    top: 14px; left: 50%;
    transform: translateX(-50%);
    background: var(--ll-vermilion);
    color: #fff8e7;
    padding: 8px 18px;
    border-radius: 22px;
    font-size: 14px;
    box-shadow: 0 6px 16px rgba(185,28,28,.35);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .25s;
    letter-spacing: 2px;
}
.ll-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.ll-tips {
    text-align: center;
    color: var(--ll-ink-2);
    font-size: 12px;
    padding: 10px 0 4px;
    letter-spacing: 1px;
}

/* ============ 战绩页 ============ */
.ll-result-card {
    max-width: 460px;
    margin: 12px auto 0;
    background: var(--ll-tile);
    border: 1.5px solid var(--ll-tile-line);
    border-radius: 8px;
    padding: 28px 24px 20px;
    text-align: center;
    box-shadow: var(--ll-shadow);
    position: relative;
}
.ll-result-seal {
    position: absolute;
    top: 18px; right: 18px;
    background: var(--ll-vermilion);
    color: #fff8e7;
    font-size: 14px;
    letter-spacing: 3px;
    padding: 6px 10px;
    transform: rotate(8deg);
    border-radius: 2px;
    box-shadow: 0 2px 6px rgba(185,28,28,.3);
}
.ll-result-seal.fail {
    background: #6b6b6b;
    box-shadow: 0 2px 6px rgba(0,0,0,.2);
}
.ll-result-level {
    font-size: 18px;
    letter-spacing: 4px;
    color: var(--ll-ink);
    margin-bottom: 22px;
    font-weight: 700;
}
.ll-result-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 18px;
}
.ll-result-stat {
    padding: 12px 4px;
    background: var(--ll-paper);
    border-radius: 4px;
}
.ll-result-num {
    font-size: 24px; font-weight: 800;
    color: var(--ll-vermilion);
    line-height: 1.1;
}
.ll-result-label {
    font-size: 12px; color: var(--ll-ink-2);
    margin-top: 4px; letter-spacing: 1px;
}
.ll-result-best {
    font-size: 13px;
    color: var(--ll-gold);
    margin-bottom: 18px;
    min-height: 18px;
    letter-spacing: 1px;
}
.ll-result-best.new-record {
    color: var(--ll-vermilion);
    font-weight: 700;
    font-size: 15px;
}
.ll-result-actions {
    display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
}
.ll-btn {
    background: var(--ll-paper);
    border: 1px solid var(--ll-tile-line);
    border-radius: 4px;
    padding: 9px 18px;
    font-size: 14px;
    color: var(--ll-ink);
    font-family: inherit;
    cursor: pointer;
    transition: background .12s;
    letter-spacing: 1px;
    display: inline-flex; align-items: center; gap: 4px;
}
.ll-btn:hover { background: #fff; }
.ll-btn.primary {
    background: var(--ll-vermilion);
    color: #fff8e7;
    border-color: var(--ll-vermilion-d);
}
.ll-btn.primary:hover { background: var(--ll-vermilion-d); }

/* ============ 移动端 ============ */
@media (max-width: 480px) {
    .ll-header { padding: 8px 10px; }
    .ll-back span { display: none; }
    .ll-title { font-size: 17px; letter-spacing: 4px; }
    .ll-main { padding: 10px 12px 20px; }
    .ll-intro-title { font-size: 26px; letter-spacing: 6px; }
    .ll-levels { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .ll-level-card { padding: 14px 8px 10px; }
    .ll-level-num { font-size: 32px; }
    .ll-level-name { font-size: 16px; }
    .ll-hud { gap: 6px; padding: 6px 0 8px; }
    .ll-hud-cell, .ll-hud-btn { padding: 5px 10px; font-size: 13px; }
    .ll-board-wrap { padding: 4px; border-width: 1px; }
    .ll-result-card { padding: 22px 16px 18px; }
    .ll-result-num { font-size: 21px; }
    .ll-btn { padding: 8px 14px; font-size: 13px; flex: 1 1 calc(50% - 4px); justify-content: center; }
}