/* ==========================================================================
   音频文件大小计算 · 页面专属样式
   设计意图：右边是一张「录音台」卡片——大字是文件体积，下面一条带刻度的时长带，
   再下面把同一段录音换成 WAV / FLAC / ALAC / AAC / MP3 排成一列比较，
   像调音台推子一样一眼看出哪个更省空间。
   仅本页引用。
   ========================================================================== */

.au-desk {
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 20px;
    align-items: start;
    margin-top: 26px;
}

.au-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 13px 14px;
}

.au-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px dashed var(--d3-line);
}

.au-btn {
    appearance: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    font-weight: 650;
    line-height: 1;
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid var(--d3-accent);
    background: var(--d3-accent);
    color: var(--d3-accent-ink);
    transition: filter .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
}

.au-btn:hover { filter: brightness(1.06); }

.au-btn-ghost {
    background: transparent;
    border-color: var(--d3-line-2);
    color: var(--d3-ink-2);
}

.au-btn-ghost:hover {
    border-color: var(--d3-accent);
    color: var(--d3-accent);
    background: rgba(var(--d3-accent-rgb), .06);
}

.au-btn-sm { padding: 8px 12px; font-size: 12.5px; }

.au-alerts { display: grid; gap: 8px; margin-top: 14px; }
.au-alerts:empty { display: none; }

/* ---------- 录音台卡片 ---------- */
.au-card {
    position: relative;
    background: var(--d3-card);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius);
    padding: 15px 18px 18px;
    overflow: hidden;
}

.au-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, var(--d3-accent), rgba(var(--d3-accent-rgb), .12));
}

.au-card-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
}

.au-card-kicker {
    font-family: var(--d3-mono);
    font-size: 10px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--d3-ink-3);
}

.au-card-cap {
    font-family: var(--d3-mono);
    font-size: 11.5px;
    color: var(--d3-accent);
}

.au-big {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin: 8px 0 0;
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: clamp(38px, 5.2vw, 52px);
    font-weight: 700;
    line-height: 1.02;
    letter-spacing: -.045em;
    color: var(--d3-ink);
}

.au-big small {
    font-family: var(--d3-sans);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0;
    color: var(--d3-ink-3);
}

.au-big-note {
    margin: 5px 0 0;
    font-size: 12px;
    line-height: 1.6;
    color: var(--d3-ink-3);
}

/* 时长带 */
.au-timeline { margin-top: 14px; }

.au-timeline-bar {
    position: relative;
    height: 10px;
    border-radius: 5px;
    background: var(--d3-paper-2);
    overflow: hidden;
}

.au-timeline-bar > i {
    display: block;
    height: 100%;
    width: 0;
    border-radius: 5px;
    background: linear-gradient(to right, rgba(var(--d3-accent-rgb), .45), var(--d3-accent));
    transition: width .22s ease;
}

.au-timeline-ticks {
    display: flex;
    justify-content: space-between;
    margin-top: 5px;
    font-family: var(--d3-mono);
    font-size: 10px;
    color: var(--d3-ink-3);
}

/* 三格指标 */
.au-kpis {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin-top: 14px;
    background: var(--d3-line);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius-sm);
    overflow: hidden;
}

.au-kpis > div {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px;
    background: var(--d3-paper);
    padding: 9px 11px;
}

.au-kpis span {
    width: 100%;
    font-size: 10.5px;
    color: var(--d3-ink-3);
}

.au-kpis b {
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: 15px;
    font-weight: 700;
    color: var(--d3-ink);
}

.au-kpis em {
    font-style: normal;
    font-family: var(--d3-mono);
    font-size: 10px;
    color: var(--d3-ink-3);
}

/* 格式对比 */
.au-codecs-wrap { margin-top: 14px; }

.au-codecs-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 9px;
}

.au-codecs-head h3 {
    font-size: 12.5px;
    font-weight: 700;
    margin: 0;
}

.au-codecs-head span {
    font-family: var(--d3-mono);
    font-size: 10.5px;
    color: var(--d3-ink-3);
}

.au-codecs { display: grid; gap: 7px; }

.au-codec {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr) 78px;
    align-items: center;
    gap: 10px;
    font-size: 11.5px;
    color: var(--d3-ink-2);
}

.au-codec.is-on { color: var(--d3-ink); font-weight: 650; }

.au-codec-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.au-codec-track {
    height: 7px;
    border-radius: 4px;
    background: var(--d3-paper-2);
    overflow: hidden;
}

.au-codec-track i {
    display: block;
    height: 100%;
    border-radius: 4px;
    background: rgba(var(--d3-accent-rgb), .4);
    transition: width .22s ease;
}

.au-codec.is-on .au-codec-track i { background: var(--d3-accent); }

.au-codec-val {
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: 11.5px;
    text-align: right;
    color: var(--d3-ink-2);
    white-space: nowrap;
}

.au-codec.is-on .au-codec-val { color: var(--d3-accent); font-weight: 700; }

/* ---------- 存储卡 / 批量 ---------- */
.au-store-wrap,
.au-batch-wrap {
    margin-top: 18px;
    background: var(--d3-card);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius);
    padding: 15px 18px 17px;
}

.au-sec-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px 14px;
    padding-bottom: 11px;
    margin-bottom: 13px;
    border-bottom: 1px solid var(--d3-line);
}

.au-sec-head h2 { font-size: var(--d3-fs-h3); }

.au-sec-head span {
    font-size: 12px;
    color: var(--d3-ink-3);
    margin-left: auto;
}

.au-store-table { min-width: 620px; }

.au-store-table td:not(:first-child),
.au-batch-table td:not(:first-child) {
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
}

.au-store-table tbody tr.is-cur td {
    background: rgba(var(--d3-accent-rgb), .08);
}

.au-batch {
    display: grid;
    grid-template-columns: minmax(240px, 330px) minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}

.au-batch textarea {
    width: 100%;
    font-family: var(--d3-mono);
    font-size: 12.5px;
    line-height: 1.75;
    color: var(--d3-ink);
    background: var(--d3-paper);
    border: 1px solid var(--d3-line-2);
    border-radius: var(--d3-radius-sm);
    padding: 10px 12px;
    resize: vertical;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.au-batch textarea:focus {
    border-color: var(--d3-accent);
    box-shadow: 0 0 0 3px rgba(var(--d3-accent-rgb), .13);
}

.au-batch-act {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 9px;
}

.au-batch-act .d3-hint { margin: 0; }

.au-batch-msg {
    margin: 8px 0 0;
    font-size: 11.5px;
    line-height: 1.6;
    color: var(--d3-ink-3);
}

.au-batch-msg.is-bad { color: var(--d3-bad); }

.au-batch-table { min-width: 480px; }

.au-empty {
    text-align: center !important;
    color: var(--d3-ink-3);
    font-family: var(--d3-sans) !important;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
    .au-desk { grid-template-columns: minmax(0, 1fr); }
    .au-batch { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 700px) {
    .au-grid { grid-template-columns: minmax(0, 1fr); }
    .au-codec { grid-template-columns: 92px minmax(0, 1fr) 70px; }
    .au-kpis { grid-template-columns: minmax(0, 1fr); }
    .au-big { font-size: 34px; }
    .au-store-wrap, .au-batch-wrap { padding: 13px 14px 15px; }
}

@media print {
    .d3-top, .d3-foot, .au-actions, .au-batch-wrap, .d3-related { display: none !important; }
    .au-desk { grid-template-columns: 1fr; }
    body { background: #fff; }
}