/* hsk-vocab —— HSK 中文词汇速查 */

.hv-card {
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 20px;
}
.hv-title { font-size: 16px; font-weight: 800; margin-bottom: 18px; }

/* 工具栏 */
.hv-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    padding: 14px 16px;
    background: var(--c-surface-soft);
    border-radius: 12px;
    margin-bottom: 16px;
}
.hv-tool-group { display: flex; align-items: center; gap: 8px; }
.hv-tool-label { font-size: 12px; font-weight: 700; color: var(--c-text-sub); }
.hv-level-btns, .hv-mode-btns { display: flex; gap: 4px; flex-wrap: wrap; }
.hv-level, .hv-mode {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    background: transparent;
    border: 1px solid var(--c-border);
    border-radius: 16px;
    cursor: pointer;
    color: var(--c-text);
    transition: all 0.12s ease;
}
.hv-level:hover, .hv-mode:hover { border-color: var(--c-primary); }
.hv-level.active, .hv-mode.active {
    border-color: var(--c-primary);
    color: var(--c-primary);
    background: color-mix(in srgb, var(--c-primary) 8%, transparent);
}

.hv-search-wrap {
    flex: 1;
    min-width: 220px;
    position: relative;
    display: flex;
    align-items: center;
}
.hv-search-icon { position: absolute; left: 12px; font-size: 14px; }
.hv-search {
    width: 100%;
    padding: 9px 14px 9px 34px;
    border: 1px solid var(--c-border);
    border-radius: 20px;
    background: var(--c-bg-card);
    font-size: 14px;
    outline: none;
    transition: border-color 0.16s ease;
}
.hv-search:focus { border-color: var(--c-primary); }

/* 列表 */
.hv-list-stats {
    font-size: 12px;
    color: var(--c-text-sub);
    margin-bottom: 10px;
    padding-left: 4px;
}
.hv-list-stats b { color: var(--c-text); font-weight: 800; }

.hv-table-wrap {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    max-height: 560px;
    overflow-y: auto;
    padding-right: 4px;
}
.hv-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 14px;
    align-items: center;
    padding: 12px 16px;
    background: var(--c-surface-soft);
    border-radius: 10px;
    border-left: 3px solid transparent;
    transition: border-color 0.12s ease, transform 0.12s ease;
}
.hv-row:hover {
    border-left-color: var(--c-primary);
    transform: translateX(2px);
}
.hv-row-cn { display: flex; flex-direction: column; }
.hv-row-hanzi {
    font-size: 22px;
    font-weight: 800;
    color: var(--c-primary);
    line-height: 1.2;
}
.hv-row-pinyin {
    font-size: 13px;
    color: var(--c-text-sub);
    margin-top: 2px;
    font-family: Georgia, serif;
    font-style: italic;
}
.hv-row-en {
    font-size: 14px;
    color: var(--c-text);
    line-height: 1.4;
}
.hv-row-level {
    font-size: 11px;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 4px;
    text-align: center;
}
.hv-row-level[data-level="1"] { background: color-mix(in srgb, #2e7d32 15%, transparent); color: #2e7d32; }
.hv-row-level[data-level="2"] { background: color-mix(in srgb, #1565c0 15%, transparent); color: #1565c0; }
.hv-row-level[data-level="3"] { background: color-mix(in srgb, #6a1b9a 15%, transparent); color: #6a1b9a; }
.hv-row-level[data-level="4"] { background: color-mix(in srgb, #ef6c00 15%, transparent); color: #ef6c00; }
.hv-row-level[data-level="5"] { background: color-mix(in srgb, #c62828 15%, transparent); color: #c62828; }
.hv-row-level[data-level="6"] { background: color-mix(in srgb, #1a1a1a 15%, transparent); color: #1a1a1a; }

.hv-empty {
    text-align: center;
    padding: 40px;
    color: var(--c-text-sub);
    font-size: 14px;
}

/* 抽查模式 */
.hv-quiz-progress {
    display: flex;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--c-surface-soft);
    border-radius: 8px;
    font-size: 13px;
    color: var(--c-text-sub);
    margin-bottom: 16px;
}
.hv-quiz-progress b { color: var(--c-text); font-weight: 800; }
.hv-quiz-remember { color: #2e7d32 !important; }
.hv-quiz-forget { color: #c62828 !important; }

.hv-flip-card { perspective: 1000px; height: 260px; margin-bottom: 18px; cursor: pointer; }
.hv-flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}
.hv-flip-card.is-flipped .hv-flip-inner { transform: rotateY(180deg); }
.hv-flip-front, .hv-flip-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    text-align: center;
}
.hv-flip-front {
    background: linear-gradient(135deg, #c62828, #d84315);
    color: #fff;
}
.hv-flip-back {
    background: var(--c-surface-soft);
    color: var(--c-text);
    transform: rotateY(180deg);
    border: 2px solid var(--c-border);
}
.hv-flip-level {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 11px;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 10px;
    background: rgba(255,255,255,0.25);
}
.hv-flip-hanzi {
    font-size: 72px;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: 2px;
}
.hv-flip-pinyin {
    font-size: 20px;
    font-style: italic;
    opacity: 0.9;
    font-family: Georgia, serif;
}
.hv-flip-hint {
    position: absolute;
    bottom: 16px;
    font-size: 12px;
    opacity: 0.7;
}
.hv-flip-english {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--c-primary);
}
.hv-flip-example {
    font-size: 14px;
    color: var(--c-text-sub);
    font-style: italic;
    max-width: 85%;
    line-height: 1.6;
}

.hv-quiz-btns { display: flex; gap: 10px; justify-content: center; }
.hv-btn {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 20px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.12s ease;
}
.hv-btn-primary { background: var(--c-primary); color: #fff; }
.hv-btn-primary:hover { opacity: 0.9; }
.hv-btn-forget { background: transparent; border-color: #c62828; color: #c62828; }
.hv-btn-forget:hover { background: color-mix(in srgb, #c62828 10%, transparent); }
.hv-btn-ghost { background: transparent; border-color: var(--c-border); color: var(--c-text-sub); }
.hv-btn-ghost:hover { color: var(--c-text); border-color: var(--c-primary); }
.hv-btn:active { transform: scale(0.97); }

/* 总览 */
.hv-overview {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    margin-bottom: 14px;
}
.hv-overview-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px 8px;
    background: var(--c-surface-soft);
    border-radius: 10px;
}
.hv-ov-num { font-size: 22px; font-weight: 900; color: var(--c-primary); }
.hv-ov-label { font-size: 11px; color: var(--c-text-sub); margin-top: 2px; text-align: center; }
.hv-ov-total { background: color-mix(in srgb, var(--c-primary) 10%, transparent); border: 1px solid color-mix(in srgb, var(--c-primary) 20%, transparent); }

.hv-tip {
    font-size: 13px;
    color: var(--c-text-sub);
    line-height: 1.8;
    margin: 0;
    padding: 12px 16px;
    background: color-mix(in srgb, var(--c-primary) 8%, transparent);
    border-radius: 8px;
}
.hv-disclaim {
    font-size: 13px;
    color: var(--c-text-sub);
    line-height: 1.8;
    padding: 14px 18px;
    background: var(--c-surface-soft);
    border: 1px solid color-mix(in srgb, var(--c-primary) 20%, transparent);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}
.hv-disclaim b { color: var(--c-text); }
.hv-info { margin-bottom: 24px; }

@media (max-width: 768px) {
    .hv-row { grid-template-columns: 1fr auto; }
    .hv-row-en { grid-column: 1 / -1; }
    .hv-overview { grid-template-columns: repeat(4, 1fr); }
    .hv-flip-card { height: 220px; }
    .hv-flip-hanzi { font-size: 54px; }
    .hv-quiz-btns { flex-wrap: wrap; }
    .hv-btn { flex: 1; min-width: 90px; }
}