/* ============================================================
   Memory Cards Pro - Frontend Styles
   白色清爽风格 · 现代年轻企业感 · 移动优先响应式
   ============================================================ */

.mcp-root {
    /* —— 色彩系统 —— */
    --mcp-purple: #7c3aed;
    --mcp-purple-light: #a78bfa;
    --mcp-purple-bg: #f5f3ff;
    --mcp-pink: #ec4899;
    --mcp-pink-light: #f9a8d4;
    --mcp-pink-bg: #fdf2f8;

    /* —— 背景层 —— */
    --mcp-bg-1: #fafbff;
    --mcp-bg-2: #f0f4ff;
    --mcp-bg-3: #ffffff;

    /* —— 玻璃与边框 —— */
    --mcp-glass: rgba(255, 255, 255, 0.72);
    --mcp-glass-strong: rgba(255, 255, 255, 0.92);
    --mcp-glass-border: rgba(124, 58, 237, 0.12);
    --mcp-card-border: rgba(15, 23, 42, 0.06);

    /* —— 文字 —— */
    --mcp-text: #1e293b;
    --mcp-text-dim: #64748b;
    --mcp-text-light: #94a3b8;

    /* —— 尺寸 —— */
    --mcp-radius: 20px;
    --mcp-radius-sm: 14px;
    --mcp-shadow: 0 8px 32px rgba(124, 58, 237, 0.06), 0 2px 8px rgba(15, 23, 42, 0.04);
    --mcp-shadow-lg: 0 20px 60px rgba(124, 58, 237, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
    --mcp-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;

    position: relative;
    min-height: 600px;
    border-radius: var(--mcp-radius);
    overflow: hidden;
    font-family: var(--mcp-font);
    color: var(--mcp-text);
    background: linear-gradient(160deg, var(--mcp-bg-1) 0%, var(--mcp-bg-2) 50%, var(--mcp-bg-3) 100%);
    box-shadow: var(--mcp-shadow-lg);
}

/* Three.js 背景画布层 */
.mcp-canvas-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}
.mcp-canvas-bg canvas { display: block; width: 100% !important; height: 100% !important; }

/* 柔和光晕装饰 */
.mcp-root::before,
.mcp-root::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    z-index: 0;
    pointer-events: none;
}
.mcp-root::before {
    width: 420px; height: 420px;
    background: var(--mcp-purple);
    top: -120px; left: -120px;
    animation: mcp-float-orb 14s ease-in-out infinite;
}
.mcp-root::after {
    width: 380px; height: 380px;
    background: var(--mcp-pink);
    bottom: -140px; right: -100px;
    animation: mcp-float-orb 16s ease-in-out infinite reverse;
}
@keyframes mcp-float-orb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, 30px) scale(1.1); }
}

.mcp-app-container {
    position: relative;
    z-index: 2;
    padding: 28px 24px;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.mcp-stage { width: 100%; max-width: 760px; }

/* ===== 加载屏 ===== */
.mcp-loading-screen { text-align: center; padding: 80px 20px; }
.mcp-loader-orb {
    width: 56px; height: 56px; margin: 0 auto 20px; border-radius: 50%;
    background: conic-gradient(from 0deg, var(--mcp-purple), var(--mcp-pink), var(--mcp-purple));
    animation: mcp-spin 1.2s linear infinite;
    position: relative;
}
.mcp-loader-orb::after {
    content: ''; position: absolute; inset: 5px; border-radius: 50%;
    background: var(--mcp-bg-3);
}
.mcp-loading-screen p { color: var(--mcp-text-dim); font-size: 14px; }
@keyframes mcp-spin { to { transform: rotate(360deg); } }

/* ===== 顶部状态栏 ===== */
.mcp-topbar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; margin-bottom: 20px; flex-wrap: wrap;
}
.mcp-stats-strip { display: flex; gap: 8px; flex-wrap: wrap; }
.mcp-stat-pill {
    background: var(--mcp-glass);
    border: 1px solid var(--mcp-card-border);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-radius: 12px; padding: 8px 14px;
    display: flex; align-items: center; gap: 6px;
    font-size: 13px; font-weight: 600;
    box-shadow: 0 2px 8px rgba(15,23,42,0.03);
}
.mcp-stat-pill .mcp-pill-icon { font-size: 15px; }
.mcp-stat-pill .mcp-pill-val { color: var(--mcp-text); font-size: 16px; font-weight: 800; }
.mcp-stat-pill .mcp-pill-label { color: var(--mcp-text-dim); }

.mcp-streak-pill {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(239, 68, 68, 0.08));
    border-color: rgba(245, 158, 11, 0.25);
}
.mcp-streak-pill .mcp-fire { font-size: 18px; animation: mcp-flicker 0.6s ease-in-out infinite alternate; }
@keyframes mcp-flicker { from { opacity: 0.8; transform: scale(0.95); } to { opacity: 1; transform: scale(1.05); } }

/* ===== 进度条 ===== */
.mcp-progress-wrap { margin-bottom: 24px; }
.mcp-progress-info {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 8px; font-size: 13px; color: var(--mcp-text-dim);
}
.mcp-progress-info strong { color: var(--mcp-text); font-size: 15px; }
.mcp-progress-bar {
    height: 8px; background: rgba(124, 58, 237, 0.08); border-radius: 8px; overflow: hidden;
    border: 1px solid var(--mcp-card-border);
}
.mcp-progress-fill {
    height: 100%; border-radius: 8px;
    background: linear-gradient(90deg, var(--mcp-purple), var(--mcp-pink));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative; overflow: hidden;
}
.mcp-progress-fill::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
    animation: mcp-shine 2s linear infinite;
}
@keyframes mcp-shine { from { transform: translateX(-100%); } to { transform: translateX(100%); } }

/* ===== 卡片 ===== */
.mcp-card-container { perspective: 1600px; margin-bottom: 24px; }

.mcp-card {
    position: relative; width: 100%; min-height: 300px;
    transform-style: preserve-3d;
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}
.mcp-card.flipped { transform: rotateY(180deg) !important; }

.mcp-card-face {
    position: absolute; inset: 0;
    backface-visibility: hidden; -webkit-backface-visibility: hidden;
    border-radius: 20px; padding: 36px 32px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    text-align: center;
    background: var(--mcp-glass-strong);
    border: 1px solid var(--mcp-card-border);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--mcp-shadow-lg);
    overflow: hidden;
}
.mcp-card-face::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--mcp-purple), var(--mcp-pink));
}

.mcp-card-back { transform: rotateY(180deg); }

.mcp-card-tag {
    display: inline-block; padding: 4px 14px; border-radius: 20px;
    font-size: 11px; font-weight: 700; letter-spacing: 0.05em;
    text-transform: uppercase; margin-bottom: 18px;
    background: var(--mcp-purple-bg); color: var(--mcp-purple);
    border: 1px solid rgba(124, 58, 237, 0.15);
}
.mcp-card-front .mcp-card-tag { background: rgba(59, 130, 246, 0.08); color: #2563eb; border-color: rgba(59, 130, 246, 0.15); }

.mcp-card-content {
    font-size: 28px; font-weight: 700; line-height: 1.5; color: var(--mcp-text);
    word-break: break-word; max-width: 100%;
}
.mcp-card-hint {
    margin-top: 16px; padding: 8px 16px; border-radius: 10px;
    background: rgba(124, 58, 237, 0.06); font-size: 14px; color: var(--mcp-text-dim);
    font-style: italic;
}

.mcp-card-meta {
    position: absolute; bottom: 18px; left: 0; right: 0;
    display: flex; justify-content: center; gap: 14px; font-size: 12px; color: var(--mcp-text-light);
    flex-wrap: wrap; padding: 0 16px;
}
.mcp-card-meta span { display: flex; align-items: center; gap: 4px; }

.mcp-card-flip-hint {
    position: absolute; bottom: 22px; font-size: 13px; color: var(--mcp-text-light);
    animation: mcp-pulse 2s ease-in-out infinite;
}
@keyframes mcp-pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 0.9; } }

/* ===== TTS 发音按钮 ===== */
.mcp-tts-btn {
    display: inline-flex; align-items: center; justify-content: center;
    vertical-align: middle; margin-left: 8px;
    width: 32px; height: 32px; font-size: 16px; line-height: 1;
    border: none; border-radius: 50%; cursor: pointer;
    background: var(--mcp-purple-bg); color: var(--mcp-purple);
    transition: all 0.25s;
    -webkit-appearance: none; appearance: none;
    position: relative; top: -1px;
}
.mcp-tts-btn:hover {
    background: var(--mcp-purple); color: #fff;
    transform: scale(1.15);
    box-shadow: 0 3px 10px rgba(124, 58, 237, 0.3);
}
.mcp-tts-btn:active { transform: scale(0.95); }
.mcp-tts-btn.speaking {
    animation: mcp-tts-pulse 0.6s ease-in-out infinite;
}
@keyframes mcp-tts-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(124, 58, 237, 0); }
}

/* ===== 音标显示 ===== */
.mcp-card-phonetic {
    font-family: 'Times New Roman', 'Arial Unicode MS', serif;
    font-size: 15px; color: var(--mcp-text-dim);
    margin-top: 12px; padding: 8px 16px;
    background: rgba(124, 58, 237, 0.05);
    border-radius: 10px;
    letter-spacing: 0.5px;
}
.mcp-card-phonetic::before { content: '🔊 '; font-size: 13px; }

/* 卡片状态标记 */
.mcp-card-status {
    position: absolute; top: 16px; right: 16px;
    width: 32px; height: 32px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 800;
}
.mcp-card-status.new { background: rgba(59,130,246,0.1); color: #2563eb; border: 1px solid rgba(59,130,246,0.2); }
.mcp-card-status.learning { background: rgba(245,158,11,0.1); color: #d97706; border: 1px solid rgba(245,158,11,0.2); }
.mcp-card-status.review { background: rgba(16,185,129,0.1); color: #059669; border: 1px solid rgba(16,185,129,0.2); }

/* ===== 评分按钮 ===== */
.mcp-grade-buttons {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
}
.mcp-grade-btn {
    padding: 16px 8px; border: 1px solid transparent; border-radius: 14px;
    font-size: 15px; font-weight: 700; cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex; flex-direction: column; align-items: center; gap: 5px;
    position: relative; overflow: hidden;
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    min-height: 44px;
}
.mcp-grade-btn::before {
    content: ''; position: absolute; inset: 0; opacity: 0.08;
    transition: opacity 0.25s;
}
.mcp-grade-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15,23,42,0.08); }
.mcp-grade-btn:hover::before { opacity: 0.15; }
.mcp-grade-btn:active { transform: translateY(0) scale(0.98); }

.mcp-grade-btn .mcp-grade-icon { font-size: 20px; }
.mcp-grade-btn .mcp-grade-label { font-size: 13px; }
.mcp-grade-btn .mcp-grade-interval {
    font-size: 11px; opacity: 0.65; font-weight: 600;
}

.mcp-grade-again { color: #dc2626; border-color: rgba(239,68,68,0.2); background: rgba(239,68,68,0.04); }
.mcp-grade-again::before { background: #ef4444; }
.mcp-grade-hard { color: #d97706; border-color: rgba(245,158,11,0.2); background: rgba(245,158,11,0.04); }
.mcp-grade-hard::before { background: #f59e0b; }
.mcp-grade-good { color: #059669; border-color: rgba(16,185,129,0.2); background: rgba(16,185,129,0.04); }
.mcp-grade-good::before { background: #10b981; }
.mcp-grade-easy { color: #2563eb; border-color: rgba(59,130,246,0.2); background: rgba(59,130,246,0.04); }
.mcp-grade-easy::before { background: #3b82f6; }

.mcp-grade-buttons.hidden { display: none; }

/* ===== 卡组选择屏 ===== */
.mcp-deck-select { width: 100%; }
.mcp-deck-select h2 {
    text-align: center; font-size: 22px; margin: 0 0 8px; color: var(--mcp-text);
}
.mcp-deck-select .mcp-select-sub {
    text-align: center; color: var(--mcp-text-dim); margin-bottom: 28px; font-size: 14px;
}
.mcp-deck-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.mcp-deck-item {
    background: var(--mcp-glass-strong); border: 1px solid var(--mcp-card-border);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-radius: 18px; padding: 22px 18px; cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative; overflow: hidden;
    box-shadow: var(--mcp-shadow);
}
.mcp-deck-item::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: var(--deck-color, var(--mcp-purple));
}
.mcp-deck-item:hover {
    transform: translateY(-4px); box-shadow: var(--mcp-shadow-lg);
    border-color: var(--deck-color, var(--mcp-purple));
}
.mcp-deck-item-icon {
    width: 48px; height: 48px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 10px; font-size: 30px;
    transition: transform 0.3s ease;
}
.mcp-deck-item:hover .mcp-deck-item-icon {
    transform: scale(1.08);
}
.mcp-deck-item-icon svg { display: block; }
.mcp-deck-item-name { font-size: 16px; font-weight: 700; color: var(--mcp-text); margin-bottom: 6px; }
.mcp-deck-item-desc { font-size: 13px; color: var(--mcp-text-dim); margin-bottom: 14px; min-height: 36px; }
.mcp-deck-item-stats { display: flex; gap: 14px; font-size: 12px; color: var(--mcp-text-dim); }
.mcp-deck-item-stats strong { color: var(--mcp-text); font-size: 18px; display: block; }
.mcp-deck-item-due {
    position: absolute; top: 14px; right: 14px;
    background: rgba(239, 68, 68, 0.1); color: #dc2626;
    border-radius: 20px; padding: 3px 10px; font-size: 11px; font-weight: 700;
}
.mcp-deck-item-due.zero { background: rgba(16, 185, 129, 0.1); color: #059669; }
.mcp-deck-item-cat {
    display: inline-block; font-size: 11px; font-weight: 600;
    color: var(--mcp-purple); background: var(--mcp-purple-bg);
    border-radius: 10px; padding: 2px 8px; margin-bottom: 8px;
}

/* ===== 搜索栏 ===== */
.mcp-search-bar {
    position: relative; display: flex; align-items: center;
    margin-bottom: 16px;
}
.mcp-search-icon {
    position: absolute; left: 14px; width: 18px; height: 18px;
    color: var(--mcp-text-light); pointer-events: none; z-index: 1;
}
.mcp-search-input {
    flex: 1; width: 100%;
    padding: 12px 40px 12px 42px;
    font-size: 15px; color: var(--mcp-text);
    background: var(--mcp-glass-strong);
    border: 1.5px solid var(--mcp-glass-border);
    border-radius: 14px;
    outline: none; transition: border-color 0.2s, box-shadow 0.2s;
    -webkit-appearance: none;
}
.mcp-search-input:focus {
    border-color: var(--mcp-purple);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}
.mcp-search-input::placeholder { color: var(--mcp-text-light); }
.mcp-search-clear {
    position: absolute; right: 10px; z-index: 1;
    width: 24px; height: 24px; border: none; cursor: pointer;
    background: var(--mcp-text-light); color: #fff;
    border-radius: 50%; font-size: 12px; line-height: 1;
    display: flex; align-items: center; justify-content: center;
    transition: background 0.2s;
}
.mcp-search-clear:hover { background: var(--mcp-text-dim); }

/* ===== 分类标签 ===== */
.mcp-category-chips {
    display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px;
    margin-bottom: 18px; -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.mcp-category-chips::-webkit-scrollbar { display: none; }
.mcp-cat-chip {
    flex-shrink: 0; cursor: pointer;
    padding: 7px 14px; font-size: 13px; font-weight: 600;
    color: var(--mcp-text-dim);
    background: var(--mcp-glass);
    border: 1.5px solid var(--mcp-card-border);
    border-radius: 20px; white-space: nowrap;
    transition: all 0.2s; -webkit-appearance: none;
}
.mcp-cat-chip:hover {
    border-color: var(--mcp-purple-light);
    color: var(--mcp-purple);
}
.mcp-cat-chip.active {
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff; border-color: transparent;
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.25);
}
.mcp-cat-count {
    font-size: 11px; opacity: 0.7; margin-left: 2px;
}

/* ===== 搜索结果 ===== */
.mcp-search-results { margin-bottom: 20px; }
.mcp-search-loading {
    text-align: center; padding: 40px 20px;
    color: var(--mcp-text-dim); font-size: 14px;
}
.mcp-search-loading .mcp-loader-orb {
    margin: 0 auto 12px;
}
.mcp-search-header {
    font-size: 14px; color: var(--mcp-text-dim);
    margin-bottom: 14px; padding-left: 2px;
}
.mcp-search-header strong { color: var(--mcp-purple); font-size: 16px; }

.mcp-search-list { display: flex; flex-direction: column; gap: 10px; }
.mcp-search-item {
    cursor: pointer; padding: 16px 18px;
    background: var(--mcp-glass-strong);
    border: 1.5px solid var(--mcp-card-border);
    border-radius: 14px;
    border-left: 3px solid var(--deck-color, var(--mcp-purple));
    transition: all 0.2s;
}
.mcp-search-item:hover {
    border-color: var(--mcp-purple-light);
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.08);
    transform: translateY(-1px);
}
.mcp-search-item-deck {
    display: flex; align-items: center; gap: 6px;
    margin-bottom: 8px; font-size: 12px;
}
.mcp-search-item-icon { font-size: 14px; }
.mcp-search-item-deck-name {
    color: var(--mcp-text-dim); font-weight: 600;
    flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.mcp-search-item-deck .mcp-card-status {
    font-size: 10px; padding: 2px 7px; border-radius: 8px;
}
.mcp-search-item-front {
    font-size: 15px; font-weight: 700; color: var(--mcp-text);
    margin-bottom: 4px; line-height: 1.4;
}
.mcp-search-item-back {
    font-size: 13px; color: var(--mcp-text-dim);
    line-height: 1.4;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.mcp-search-item-tags {
    font-size: 11px; color: var(--mcp-text-light);
    margin-top: 6px;
}
.mcp-search-item-tags::before { content: '🏷 '; }
.mcp-search-item-action {
    font-size: 11px; color: var(--mcp-purple);
    margin-top: 8px; font-weight: 600; text-align: right;
}
.mcp-search-item mark {
    background: rgba(124, 58, 237, 0.12);
    color: var(--mcp-purple); font-weight: 700;
    border-radius: 3px; padding: 0 2px;
}

/* ===== 完成屏 ===== */
.mcp-complete {
    text-align: center; padding: 40px 20px;
}
.mcp-complete-icon {
    font-size: 64px; margin-bottom: 18px;
    animation: mcp-bounce-in 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes mcp-bounce-in { from { transform: scale(0); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.mcp-complete h2 { font-size: 26px; margin: 0 0 12px; color: var(--mcp-text); }
.mcp-complete p { color: var(--mcp-text-dim); font-size: 16px; margin-bottom: 28px; }

.mcp-complete-stats { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.mcp-complete-stat {
    background: var(--mcp-glass-strong); border: 1px solid var(--mcp-card-border);
    border-radius: 16px; padding: 20px 24px; min-width: 110px;
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--mcp-shadow);
}
.mcp-complete-stat-num {
    font-size: 34px; font-weight: 800;
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.mcp-complete-stat-label { font-size: 13px; color: var(--mcp-text-dim); margin-top: 4px; }

.mcp-btn-primary {
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff; border: none; border-radius: 12px;
    padding: 13px 32px; font-size: 15px; font-weight: 700; cursor: pointer;
    transition: all 0.25s; box-shadow: 0 6px 18px rgba(124, 58, 237, 0.25);
    min-height: 44px;
}
.mcp-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(124, 58, 237, 0.35); }
.mcp-btn-secondary {
    background: var(--mcp-glass); color: var(--mcp-text); border: 1px solid var(--mcp-card-border);
    border-radius: 12px; padding: 13px 26px; font-size: 14px; font-weight: 600; cursor: pointer;
    transition: all 0.25s; margin-left: 10px;
    min-height: 44px;
}
.mcp-btn-secondary:hover { background: rgba(255,255,255,0.9); border-color: var(--mcp-purple-light); }

/* ===== XP 弹出动画 ===== */
.mcp-xp-pop {
    position: fixed; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 44px; font-weight: 900; color: #d97706;
    text-shadow: 0 0 20px rgba(217, 119, 6, 0.3);
    pointer-events: none; z-index: 9999;
    animation: mcp-xp-fly 1.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes mcp-xp-fly {
    0% { transform: translate(-50%, -50%) scale(0.3); opacity: 0; }
    30% { transform: translate(-50%, -80%) scale(1.3); opacity: 1; }
    100% { transform: translate(-50%, -200%) scale(0.8); opacity: 0; }
}

/* ===== 连击动画 ===== */
.mcp-combo-burst {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 56px; font-weight: 900;
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
    text-shadow: none; pointer-events: none; z-index: 100;
    animation: mcp-combo-pop 1s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes mcp-combo-pop {
    0% { transform: translate(-50%, -50%) scale(0) rotate(-15deg); opacity: 0; }
    40% { transform: translate(-50%, -50%) scale(1.4) rotate(5deg); opacity: 1; }
    100% { transform: translate(-50%, -150%) scale(0.6) rotate(0); opacity: 0; }
}

/* ===== 等级条 ===== */
.mcp-level-wrap {
    display: flex; align-items: center; gap: 10px;
    background: var(--mcp-glass); border: 1px solid var(--mcp-card-border);
    backdrop-filter: blur(12px); border-radius: 12px; padding: 8px 14px;
    box-shadow: 0 2px 8px rgba(15,23,42,0.03);
}
.mcp-level-badge {
    width: 32px; height: 32px; border-radius: 50%;
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 800; color: #fff;
    box-shadow: 0 3px 10px rgba(124, 58, 237, 0.3);
}
.mcp-level-info { display: flex; flex-direction: column; gap: 2px; }
.mcp-level-bar { width: 72px; height: 5px; background: rgba(124,58,237,0.1); border-radius: 5px; overflow: hidden; }
.mcp-level-bar-fill { height: 100%; background: linear-gradient(90deg, var(--mcp-purple-light), var(--mcp-pink-light)); transition: width 0.5s; }
.mcp-level-text { font-size: 11px; color: var(--mcp-text-dim); }

/* ===== 空状态 ===== */
.mcp-empty-state { text-align: center; padding: 60px 20px; }
.mcp-empty-icon { font-size: 52px; margin-bottom: 16px; opacity: 0.7; }
.mcp-empty-state h3 { color: var(--mcp-text); font-size: 20px; margin: 0 0 8px; }
.mcp-empty-state p { color: var(--mcp-text-dim); margin-bottom: 24px; }

/* ===== 入场动画 ===== */
.mcp-fade-in { animation: mcp-fade-in 0.5s ease forwards; }
@keyframes mcp-fade-in { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.mcp-card-enter { animation: mcp-card-enter 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; }
@keyframes mcp-card-enter {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ============================================================
   导航栏
   ============================================================ */
.mcp-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--mcp-glass-strong);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--mcp-card-border);
    border-radius: 16px;
    padding: 6px;
    margin-bottom: 20px;
    box-shadow: var(--mcp-shadow);
    width: 100%;
    max-width: 760px;
    box-sizing: border-box;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.mcp-nav::-webkit-scrollbar { display: none; }
.mcp-nav-btn {
    background: transparent;
    border: none;
    color: var(--mcp-text-dim);
    padding: 10px 18px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    min-height: 40px;
    flex-shrink: 0;
}
.mcp-nav-btn:hover { color: var(--mcp-text); background: rgba(124, 58, 237, 0.06); }
.mcp-nav-btn.active {
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff;
    box-shadow: 0 3px 10px rgba(124, 58, 237, 0.3);
}
.mcp-nav-profile {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px 4px 4px;
    background: rgba(124, 58, 237, 0.06);
    border-radius: 24px;
    flex-shrink: 0;
}
.mcp-nav-profile img { width: 28px; height: 28px; border-radius: 50%; }
.mcp-nav-profile .mcp-nav-level {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    font-size: 12px;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 10px;
}
.mcp-nav-profile .mcp-nav-xp { font-size: 13px; color: var(--mcp-text); font-weight: 600; }
.mcp-nav-login {
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff !important;
    padding: 8px 16px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
}

/* ============================================================
   新手引导覆盖层
   ============================================================ */
.mcp-onboarding {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(248, 250, 252, 0.88);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: mcp-fade-in 0.4s ease;
    padding: 20px;
    box-sizing: border-box;
}
.mcp-onboarding-card {
    max-width: 500px;
    width: 100%;
    background: #fff;
    border: 1px solid var(--mcp-card-border);
    border-radius: 24px;
    padding: 36px 32px;
    text-align: center;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
}
.mcp-onboarding-icon {
    font-size: 60px;
    margin-bottom: 18px;
    animation: mcp-bounce 2s ease infinite;
}
@keyframes mcp-bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.mcp-onboarding-step {
    display: inline-block;
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 12px;
    margin-bottom: 14px;
}
.mcp-onboarding-title { font-size: 22px; font-weight: 800; color: var(--mcp-text); margin-bottom: 12px; }
.mcp-onboarding-desc { font-size: 15px; line-height: 1.7; color: var(--mcp-text-dim); margin-bottom: 24px; }
.mcp-onboarding-dots { display: flex; gap: 8px; justify-content: center; margin-bottom: 22px; }
.mcp-onboarding-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(124,58,237,0.15); transition: all 0.3s; }
.mcp-onboarding-dot.active { width: 24px; border-radius: 4px; background: linear-gradient(90deg, var(--mcp-purple), var(--mcp-pink)); }
.mcp-onboarding-btns { display: flex; gap: 12px; justify-content: center; }
.mcp-onboarding-btn {
    padding: 12px 26px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    min-height: 44px;
}
.mcp-onboarding-btn.skip { background: rgba(15,23,42,0.06); color: var(--mcp-text-dim); }
.mcp-onboarding-btn.skip:hover { background: rgba(15,23,42,0.1); color: var(--mcp-text); }
.mcp-onboarding-btn.next {
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}
.mcp-onboarding-btn.next:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(124, 58, 237, 0.4); }

/* ============================================================
   排行榜
   ============================================================ */
.mcp-leaderboard { max-width: 700px; margin: 0 auto; }
.mcp-lb-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.mcp-lb-tab {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--mcp-card-border);
    background: var(--mcp-glass);
    color: var(--mcp-text-dim);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    min-height: 44px;
}
.mcp-lb-tab.active {
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 3px 10px rgba(124, 58, 237, 0.25);
}
.mcp-lb-podium { display: flex; gap: 12px; margin-bottom: 20px; align-items: flex-end; justify-content: center; }
.mcp-lb-podium-item { text-align: center; flex: 1; max-width: 180px; }
.mcp-lb-podium-item .mcp-lb-avatar {
    width: 60px; height: 60px; border-radius: 50%; margin: 0 auto 8px;
    border: 3px solid;
    box-shadow: 0 4px 12px rgba(15,23,42,0.08);
}
.mcp-lb-podium-item.rank-1 .mcp-lb-avatar { border-color: #fbbf24; }
.mcp-lb-podium-item.rank-2 .mcp-lb-avatar { border-color: #cbd5e1; }
.mcp-lb-podium-item.rank-3 .mcp-lb-avatar { border-color: #d97706; }
.mcp-lb-podium-bar {
    border-radius: 12px 12px 0 0;
    padding: 14px 8px;
    margin-top: 8px;
    backdrop-filter: blur(12px);
}
.mcp-lb-podium-item.rank-1 .mcp-lb-podium-bar { height: 90px; background: linear-gradient(180deg, rgba(251,191,36,0.2), rgba(251,191,36,0.06)); }
.mcp-lb-podium-item.rank-2 .mcp-lb-podium-bar { height: 68px; background: linear-gradient(180deg, rgba(203,213,225,0.18), rgba(203,213,225,0.05)); }
.mcp-lb-podium-item.rank-3 .mcp-lb-podium-bar { height: 50px; background: linear-gradient(180deg, rgba(217,119,6,0.18), rgba(217,119,6,0.05)); }
.mcp-lb-podium-name { font-size: 14px; font-weight: 700; color: var(--mcp-text); margin-bottom: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mcp-lb-podium-xp { font-size: 13px; color: var(--mcp-text-dim); }
.mcp-lb-podium-medal { font-size: 26px; margin-bottom: 4px; }

.mcp-lb-list { display: flex; flex-direction: column; gap: 8px; }
.mcp-lb-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--mcp-glass-strong);
    border: 1px solid var(--mcp-card-border);
    border-radius: 14px;
    transition: all 0.3s;
    box-shadow: 0 2px 6px rgba(15,23,42,0.02);
}
.mcp-lb-row:hover { background: #fff; transform: translateX(4px); box-shadow: var(--mcp-shadow); }
.mcp-lb-row.is-me {
    background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(236,72,153,0.06));
    border-color: rgba(124,58,237,0.2);
    box-shadow: 0 0 0 1px rgba(124,58,237,0.1);
}
.mcp-lb-rank { width: 32px; text-align: center; font-size: 16px; font-weight: 800; color: var(--mcp-text-light); flex-shrink: 0; }
.mcp-lb-rank.top-3 { background: linear-gradient(135deg, #f59e0b, #d97706); -webkit-background-clip: text; -webkit-text-fill-color: transparent; font-size: 18px; }
.mcp-lb-row img { width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0; }
.mcp-lb-info { flex: 1; min-width: 0; }
.mcp-lb-info-name { font-size: 14px; font-weight: 700; color: var(--mcp-text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mcp-lb-info-sub { font-size: 12px; color: var(--mcp-text-light); }
.mcp-lb-stats { display: flex; gap: 14px; align-items: center; flex-shrink: 0; }
.mcp-lb-stat { text-align: center; }
.mcp-lb-stat-val { font-size: 16px; font-weight: 800; color: var(--mcp-text); }
.mcp-lb-stat-val.xp { background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.mcp-lb-stat-val.streak { color: #d97706; }
.mcp-lb-stat-label { font-size: 10px; color: var(--mcp-text-light); text-transform: uppercase; }
.mcp-lb-empty { text-align: center; padding: 60px 20px; color: var(--mcp-text-light); font-size: 15px; }

/* ============================================================
   卡组提交表单
   ============================================================ */
.mcp-submit-form { max-width: 600px; margin: 0 auto; }
.mcp-form-group { margin-bottom: 20px; }
.mcp-form-label { display: block; font-size: 14px; font-weight: 600; color: var(--mcp-text); margin-bottom: 8px; }
.mcp-form-input, .mcp-form-textarea {
    width: 100%;
    background: #fff;
    border: 1px solid var(--mcp-card-border);
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--mcp-text);
    font-size: 16px; /* 16px 防止 iOS 聚焦缩放 */
    font-family: inherit;
    transition: all 0.3s;
    box-sizing: border-box;
    box-shadow: 0 1px 3px rgba(15,23,42,0.02);
}
.mcp-form-input:focus, .mcp-form-textarea:focus {
    outline: none;
    border-color: var(--mcp-purple-light);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}
.mcp-form-textarea { min-height: 180px; resize: vertical; line-height: 1.6; }
.mcp-form-hint { font-size: 12px; color: var(--mcp-text-light); margin-top: 6px; }
.mcp-form-counter { font-size: 12px; color: var(--mcp-text-dim); text-align: right; margin-top: 4px; }

/* ===== TTS 语音设置 ===== */
.mcp-tts-settings { max-width: 500px; margin: 0 auto; }
.mcp-tts-settings-card {
    background: var(--mcp-glass-strong); border: 1px solid var(--mcp-card-border);
    border-radius: 18px; padding: 28px 24px; box-shadow: var(--mcp-shadow);
}
.mcp-tts-voice-group {
    margin-bottom: 18px; padding-bottom: 18px;
    border-bottom: 1px solid var(--mcp-card-border);
}
.mcp-tts-voice-group:last-of-type { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.mcp-tts-voice-label {
    display: block; font-size: 14px; font-weight: 600; color: var(--mcp-text);
    margin-bottom: 8px;
}
.mcp-tts-voice-select {
    width: 100%; padding: 12px 14px; font-size: 14px; color: var(--mcp-text);
    background: #fff; border: 1.5px solid var(--mcp-card-border);
    border-radius: 12px; cursor: pointer; outline: none;
    transition: border-color 0.2s; -webkit-appearance: none; appearance: none;
    font-family: inherit;
}
.mcp-tts-voice-select:focus { border-color: var(--mcp-purple-light); box-shadow: 0 0 0 3px rgba(124,58,237,0.1); }
.mcp-tts-voice-row { display: flex; gap: 8px; align-items: center; }
.mcp-tts-voice-row .mcp-tts-voice-select { flex: 1; }
.mcp-tts-preview-btn {
    flex-shrink: 0; width: 40px; height: 40px;
    border: 1.5px solid var(--mcp-purple-light); border-radius: 12px;
    background: var(--mcp-purple-bg); color: var(--mcp-purple);
    font-size: 17px; cursor: pointer; transition: all 0.2s;
    display: flex; align-items: center; justify-content: center;
    -webkit-appearance: none; appearance: none;
}
.mcp-tts-preview-btn:hover { background: var(--mcp-purple); color: #fff; border-color: var(--mcp-purple); transform: scale(1.05); }
.mcp-tts-preview-btn:disabled { opacity: 0.5; cursor: default; transform: none; }

.mcp-color-picker { display: flex; gap: 8px; flex-wrap: wrap; }
.mcp-color-swatch {
    width: 36px; height: 36px; border-radius: 10px; cursor: pointer;
    border: 2px solid transparent; transition: all 0.2s;
}
.mcp-color-swatch:hover { transform: scale(1.1); }
.mcp-color-swatch.selected { border-color: var(--mcp-text); box-shadow: 0 0 0 2px rgba(255,255,255,0.5); }

/* ===== 图标选择器 ===== */
.mcp-icon-picker {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(42px, 1fr));
    gap: 6px; max-height: 200px; overflow-y: auto;
    background: var(--mcp-glass); border: 1.5px solid var(--mcp-card-border);
    border-radius: 14px; padding: 10px;
}
.mcp-icon-swatch {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 10px; cursor: pointer;
    border: 2px solid transparent; transition: all 0.2s;
    color: var(--mcp-text-dim);
}
.mcp-icon-swatch:hover { background: var(--mcp-purple-bg); color: var(--mcp-purple); transform: scale(1.08); }
.mcp-icon-swatch.selected { border-color: var(--mcp-purple); color: var(--mcp-purple); background: var(--mcp-purple-bg); }
.mcp-icon-swatch svg { display: block; }

/* ===== 卡组预览徽章（提交表单顶部） ===== */
.mcp-deck-preview-badge {
    display: flex; align-items: center; gap: 14px;
    background: var(--mcp-glass-strong); border: 1.5px solid var(--mcp-card-border);
    border-radius: 16px; padding: 14px 18px; margin-bottom: 20px;
}
.mcp-dpb-icon {
    width: 44px; height: 44px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; color: #fff;
}
.mcp-dpb-icon svg { display: block; }
.mcp-dpb-text { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.mcp-dpb-name { font-size: 15px; font-weight: 700; color: var(--mcp-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mcp-dpb-cat { font-size: 12px; color: var(--mcp-text-light); }
.mcp-form-hint-inline { font-size: 12px; font-weight: 400; color: var(--mcp-text-light); }

/* ===== 复习界面卡组信息栏 ===== */
.mcp-deck-info-bar {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 16px; margin-bottom: 12px;
    background: var(--mcp-glass); border: 1.5px solid var(--mcp-card-border);
    border-radius: 12px; font-size: 13px;
}
.mcp-deck-info-icon { display: flex; color: var(--deck-color, var(--mcp-purple)); flex-shrink: 0; }
.mcp-deck-info-icon svg { display: block; }
.mcp-deck-info-name { font-weight: 600; color: var(--mcp-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mcp-deck-info-cat {
    margin-left: auto; font-size: 11px; font-weight: 600;
    color: var(--deck-color, var(--mcp-purple));
    background: var(--deck-color, var(--mcp-purple))14;
    border-radius: 10px; padding: 2px 8px;
    white-space: nowrap; flex-shrink: 0;
}

.mcp-preview-cards { margin: 16px 0; display: flex; flex-direction: column; gap: 6px; max-height: 200px; overflow-y: auto; }
.mcp-preview-card {
    background: rgba(124, 58, 237, 0.03);
    border: 1px solid var(--mcp-card-border);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 13px;
    color: var(--mcp-text-dim);
}
.mcp-preview-card strong { color: var(--mcp-purple); }
.mcp-submit-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff;
    border: none;
    border-radius: 14px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 6px 18px rgba(124, 58, 237, 0.25);
    min-height: 48px;
}
.mcp-submit-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(124, 58, 237, 0.35); }
.mcp-submit-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* 我的提交列表 */
.mcp-sub-list { max-width: 600px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.mcp-sub-item {
    display: flex; align-items: center; gap: 14px;
    padding: 16px; border-radius: 14px;
    background: var(--mcp-glass-strong); border: 1px solid var(--mcp-card-border);
    box-shadow: 0 2px 6px rgba(15,23,42,0.02);
}
.mcp-sub-badge {
    padding: 4px 12px; border-radius: 10px; font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.mcp-sub-badge.pending { background: rgba(245,158,11,0.1); color: #d97706; }
.mcp-sub-badge.approved { background: rgba(34,197,94,0.1); color: #16a34a; }
.mcp-sub-badge.rejected { background: rgba(239,68,68,0.1); color: #dc2626; }
.mcp-sub-info { flex: 1; min-width: 0; }
.mcp-sub-title { font-size: 15px; font-weight: 700; color: var(--mcp-text); }
.mcp-sub-meta { font-size: 12px; color: var(--mcp-text-light); margin-top: 2px; }
.mcp-sub-notes { font-size: 12px; color: #dc2626; margin-top: 4px; }

/* 登录提示 */
.mcp-login-prompt { text-align: center; padding: 60px 20px; }
.mcp-login-prompt-icon { font-size: 52px; margin-bottom: 16px; }
.mcp-login-prompt-text { font-size: 16px; color: var(--mcp-text-dim); margin-bottom: 24px; line-height: 1.6; }
.mcp-login-prompt-btn {
    display: inline-block;
    padding: 14px 36px;
    background: linear-gradient(135deg, var(--mcp-purple), var(--mcp-pink));
    color: #fff; border-radius: 14px; text-decoration: none;
    font-size: 16px; font-weight: 700;
    box-shadow: 0 6px 18px rgba(124,58,237,0.25);
    transition: all 0.3s;
    min-height: 48px;
    line-height: 48px;
}
.mcp-login-prompt-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(124,58,237,0.35); }

/* 提示 toast */
.mcp-toast {
    position: fixed; top: 24px; left: 50%; transform: translateX(-50%);
    background: #fff; backdrop-filter: blur(20px);
    border: 1px solid var(--mcp-card-border);
    color: var(--mcp-text); padding: 14px 28px; border-radius: 14px;
    font-size: 15px; font-weight: 600; z-index: 10000;
    box-shadow: 0 10px 30px rgba(15,23,42,0.12);
    animation: mcp-toast-in 0.4s ease;
    max-width: 90vw;
    box-sizing: border-box;
}
.mcp-toast.success { border-color: rgba(34,197,94,0.3); }
.mcp-toast.error { border-color: rgba(239,68,68,0.3); }
@keyframes mcp-toast-in { from { opacity: 0; transform: translateX(-50%) translateY(-20px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }

/* ============================================================
   响应式 · 平板
   ============================================================ */
@media (max-width: 768px) {
    .mcp-app-container { padding: 20px 16px; }
    .mcp-card-content { font-size: 24px; }
    .mcp-card-face { padding: 30px 24px; min-height: 260px; }
    .mcp-complete-stat { padding: 16px 20px; min-width: 100px; }
    .mcp-complete-stat-num { font-size: 28px; }
    .mcp-lb-stats { gap: 12px; }
    .mcp-lb-stat-val { font-size: 14px; }
}

/* ============================================================
   响应式 · 手机
   ============================================================ */
@media (max-width: 640px) {
    .mcp-app-container { padding: 16px 12px; }

    /* 导航栏：横向滚动 + 紧凑 */
    .mcp-nav { padding: 5px; gap: 3px; margin-bottom: 16px; }
    .mcp-nav-btn { padding: 9px 14px; font-size: 13px; min-height: 38px; }
    .mcp-nav-profile { padding: 3px 10px 3px 3px; gap: 6px; }
    .mcp-nav-profile .mcp-nav-xp { font-size: 12px; }
    .mcp-nav-profile .mcp-nav-level { font-size: 11px; padding: 2px 6px; }

    /* 卡片 */
    .mcp-card { min-height: 240px; }
    .mcp-card-face { padding: 24px 20px; border-radius: 18px; }
    .mcp-card-content { font-size: 20px; line-height: 1.4; }
    .mcp-card-hint { font-size: 13px; margin-top: 12px; padding: 6px 14px; }
    .mcp-card-status { width: 28px; height: 28px; font-size: 12px; top: 12px; right: 12px; }
    .mcp-card-flip-hint { font-size: 12px; bottom: 16px; }
    .mcp-tts-btn { width: 28px; height: 28px; font-size: 14px; margin-left: 6px; }
    .mcp-card-phonetic { font-size: 14px; padding: 6px 12px; }
    .mcp-card-meta { font-size: 11px; gap: 10px; bottom: 14px; }

    /* 顶部状态栏：垂直堆叠 */
    .mcp-topbar { flex-direction: column; align-items: stretch; gap: 10px; margin-bottom: 16px; }
    .mcp-stats-strip { justify-content: center; }
    .mcp-stat-pill { padding: 7px 12px; font-size: 12px; }
    .mcp-stat-pill .mcp-pill-val { font-size: 14px; }
    .mcp-level-wrap { justify-content: center; }

    /* 进度条 */
    .mcp-progress-wrap { margin-bottom: 18px; }

    /* 评分按钮：2×2 网格 */
    .mcp-grade-buttons { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .mcp-grade-btn { padding: 14px 8px; min-height: 48px; }
    .mcp-grade-btn .mcp-grade-icon { font-size: 22px; }
    .mcp-grade-btn .mcp-grade-label { font-size: 14px; }
    .mcp-grade-btn .mcp-grade-interval { font-size: 11px; }

    /* 卡组列表：单列 */
    .mcp-deck-list { grid-template-columns: 1fr; gap: 12px; }
    .mcp-deck-item { padding: 18px 16px; }
    .mcp-deck-item-icon { font-size: 28px; margin-bottom: 8px; }
    .mcp-deck-item-name { font-size: 16px; }

    /* 完成屏 */
    .mcp-complete { padding: 28px 16px; }
    .mcp-complete-icon { font-size: 52px; }
    .mcp-complete h2 { font-size: 22px; }
    .mcp-complete p { font-size: 14px; }
    .mcp-complete-stats { gap: 10px; }
    .mcp-complete-stat { padding: 14px 16px; min-width: 90px; }
    .mcp-complete-stat-num { font-size: 24px; }

    /* 按钮全宽 */
    .mcp-btn-primary, .mcp-btn-secondary {
        display: block; width: 100%; margin-left: 0; margin-bottom: 8px;
    }

    /* 排行榜 */
    .mcp-leaderboard h2 { font-size: 20px; }
    .mcp-lb-podium { gap: 6px; }
    .mcp-lb-podium-item .mcp-lb-avatar { width: 48px; height: 48px; }
    .mcp-lb-podium-item.rank-1 .mcp-lb-podium-bar { height: 70px; }
    .mcp-lb-podium-item.rank-2 .mcp-lb-podium-bar { height: 54px; }
    .mcp-lb-podium-item.rank-3 .mcp-lb-podium-bar { height: 40px; }
    .mcp-lb-podium-name { font-size: 12px; }
    .mcp-lb-podium-xp { font-size: 11px; }
    .mcp-lb-podium-medal { font-size: 22px; }

    /* 排行榜列表行：统计数据堆叠 */
    .mcp-lb-row { padding: 10px 12px; gap: 10px; flex-wrap: wrap; }
    .mcp-lb-row img { width: 32px; height: 32px; }
    .mcp-lb-info-name { font-size: 13px; }
    .mcp-lb-info-sub { font-size: 11px; }
    .mcp-lb-stats { gap: 10px; width: 100%; justify-content: flex-end; padding-top: 4px; border-top: 1px solid var(--mcp-card-border); }
    .mcp-lb-stat-val { font-size: 14px; }
    .mcp-lb-stat-label { font-size: 9px; }

    /* 提交表单 */
    .mcp-submit-form h2 { font-size: 20px; }
    .mcp-form-input, .mcp-form-textarea { padding: 12px 14px; font-size: 16px; }
    .mcp-form-textarea { min-height: 140px; }
    .mcp-color-swatch { width: 32px; height: 32px; }
    .mcp-icon-picker { gap: 4px; padding: 8px; max-height: 150px; }
    .mcp-icon-swatch { width: 34px; height: 34px; }
    .mcp-deck-preview-badge { padding: 12px 14px; }
    .mcp-dpb-icon { width: 38px; height: 38px; }
    .mcp-dpb-name { font-size: 14px; }

    /* 引导页 */
    .mcp-onboarding-card { padding: 28px 22px; border-radius: 20px; }
    .mcp-onboarding-icon { font-size: 48px; }
    .mcp-onboarding-title { font-size: 20px; }
    .mcp-onboarding-desc { font-size: 14px; }
    .mcp-onboarding-btn { padding: 11px 22px; font-size: 14px; }

    /* XP 弹出 */
    .mcp-xp-pop { font-size: 36px; }
    .mcp-combo-burst { font-size: 44px; }

    /* 搜索栏 */
    .mcp-search-input { padding: 11px 36px 11px 38px; font-size: 16px; }
    .mcp-search-icon { left: 12px; width: 16px; height: 16px; }
    .mcp-search-clear { width: 22px; height: 22px; right: 8px; }
    .mcp-cat-chip { padding: 6px 12px; font-size: 12px; }
    .mcp-search-item { padding: 14px 14px; }
    .mcp-search-item-front { font-size: 14px; }
    .mcp-search-item-back { font-size: 12px; }
}

/* ============================================================
   响应式 · 小屏手机
   ============================================================ */
@media (max-width: 380px) {
    .mcp-app-container { padding: 12px 8px; }
    .mcp-card-face { padding: 20px 16px; }
    .mcp-card-content { font-size: 18px; }
    .mcp-grade-btn { padding: 12px 6px; }
    .mcp-grade-btn .mcp-grade-icon { font-size: 20px; }
    .mcp-grade-btn .mcp-grade-label { font-size: 13px; }
    .mcp-nav-btn { padding: 8px 12px; font-size: 12px; }
}