/* 视频时长计算器 —— 站点共享变量 + 紫色强调色，暗色自动适配 */
.vdc-hero {
    --accent: #a855f7;
    --accent-2: #9333ea;
    --accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);
    background: var(--c-bg-soft, #f6f8fc);
    border: 1px solid var(--c-border, #e3e8f1);
    border-radius: 16px;
    padding: 18px;
    margin-bottom: 18px;
}

.vdc-topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.vdc-brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.vdc-logo { width: 44px; height: 44px; border-radius: 12px; flex: none; display: grid; place-items: center; font-size: 24px; background: var(--accent-soft); }
.vdc-title { font-size: 20px; font-weight: 800; color: var(--c-text, #1f2b45); letter-spacing: .3px; }
.vdc-tagline { font-size: 13px; color: var(--c-text-sub, #6b7a96); margin-top: 2px; }
.vdc-note-pill { font-size: 12px; color: var(--c-text-sub, #6b7a96); white-space: nowrap; background: var(--c-bg, #fff); border: 1px solid var(--c-border, #e3e8f1); padding: 6px 12px; border-radius: 999px; }

/* 求解目标切换 */
.vdc-solves { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.vdc-solve {
    border: 1px solid var(--c-border, #e3e8f1); background: var(--c-bg, #fff); color: var(--c-text-sub, #4a587a);
    border-radius: 999px; padding: 6px 14px; font-size: 12.5px; font-weight: 700; cursor: pointer; transition: .15s;
}
.vdc-solve:hover { border-color: var(--accent); color: var(--accent); }
.vdc-solve.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* 输入区 */
.vdc-inputs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.vdc-field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.vdc-field > span { font-size: 11.5px; color: var(--c-text-muted, #8a94ab); display: flex; align-items: center; gap: 5px; }
.vdc-field input, .vdc-field select {
    border: 1px solid var(--c-border, #e3e8f1); border-radius: 10px; padding: 10px 12px;
    font-size: 15px; font-weight: 700; color: var(--c-text, #1f2b45); background: var(--c-bg, #fff); width: 100%; min-width: 0;
    font-variant-numeric: tabular-nums;
}
.vdc-field input:focus, .vdc-field select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.vdc-field select { font-size: 13px; font-weight: 500; }
.vdc-field input.is-result { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.vdc-field input[readonly] { cursor: default; }
.vdc-hint { font-size: 11.5px; color: var(--c-text-muted, #8a94ab); margin-top: 6px; }

/* 结果 */
.vdc-out {
    margin-top: 14px; text-align: center; padding: 18px 14px; border-radius: 14px;
    background: var(--c-bg, #fff); border: 1px solid var(--c-border, #e3e8f1);
}
.vdc-out-label { font-size: 12px; color: var(--c-text-muted, #8a94ab); letter-spacing: 1px; }
.vdc-out-value {
    font-size: 34px; font-weight: 800; color: var(--accent); margin: 4px 0 2px;
    font-variant-numeric: tabular-nums; word-break: break-all; line-height: 1.2;
}
.vdc-out-value.is-idle { color: var(--c-text-muted, #8a94ab); }
.vdc-out-sub { font-size: 12.5px; color: var(--c-text-sub, #4a587a); }

/* 快捷时长 */
.vdc-quick { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.vdc-quick button {
    border: 1px dashed var(--c-border, #cbd5e5); background: transparent; color: var(--c-text-sub, #4a587a);
    border-radius: 999px; padding: 4px 11px; font-size: 12px; cursor: pointer; transition: .15s;
}
.vdc-quick button:hover { border-style: solid; border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* 功能区块 */
.vdc-block { margin-top: 14px; background: var(--c-bg, #fff); border: 1px solid var(--c-border, #e3e8f1); border-radius: 12px; padding: 14px; }
.vdc-block-title { font-size: 13.5px; font-weight: 800; color: var(--c-text, #1f2b45); margin-bottom: 4px; }
.vdc-block-desc { font-size: 12px; color: var(--c-text-muted, #8a94ab); margin-bottom: 10px; line-height: 1.6; }

.vdc-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; align-items: end; }
.vdc-row.two { grid-template-columns: repeat(2, 1fr); }
.vdc-io { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.vdc-io > span { font-size: 11.5px; color: var(--c-text-muted, #8a94ab); }
.vdc-io input, .vdc-io select {
    border: 1px solid var(--c-border, #e3e8f1); border-radius: 10px; padding: 9px 11px;
    font-size: 14px; font-weight: 700; color: var(--c-text, #1f2b45); background: var(--c-bg, #fff); width: 100%; min-width: 0;
    font-variant-numeric: tabular-nums;
}
.vdc-io select { font-weight: 500; font-size: 13px; }
.vdc-io input:focus, .vdc-io select:focus { outline: none; border-color: var(--accent); }
.vdc-io .vdc-read {
    border: 1px solid var(--c-border, #e3e8f1); border-radius: 10px; padding: 9px 11px;
    font-size: 15px; font-weight: 800; color: var(--accent); background: var(--accent-soft);
    font-variant-numeric: tabular-nums; word-break: break-all;
}

.vdc-btn {
    display: inline-block; border: 1px solid var(--c-border, #e3e8f1); background: var(--c-bg, #fff);
    color: var(--c-text, #1f2b45); border-radius: 10px; padding: 9px 16px;
    font-size: 13.5px; font-weight: 600; cursor: pointer; transition: .15s; white-space: nowrap;
}
.vdc-btn:hover { border-color: var(--accent); color: var(--accent); }
.vdc-btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.vdc-btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); color: #fff; }

/* 片段列表 */
.vdc-seg-list { display: flex; flex-direction: column; gap: 6px; }
.vdc-seg-empty { font-size: 12.5px; color: var(--c-text-muted, #8a94ab); padding: 10px; text-align: center; }
.vdc-seg {
    display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 10px;
    border: 1px solid var(--c-border, #e3e8f1); background: var(--c-bg-soft, #f6f8fc);
}
.vdc-seg-no { width: 20px; flex: none; font-size: 12px; color: var(--c-text-muted, #8a94ab); }
.vdc-seg-name { flex: 1; min-width: 0; font-size: 13px; font-weight: 700; color: var(--c-text, #1f2b45); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vdc-seg-dur { font-size: 13px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.vdc-seg-sub { font-size: 11.5px; color: var(--c-text-muted, #8a94ab); white-space: nowrap; }
.vdc-mini {
    width: 26px; height: 24px; flex: none; display: grid; place-items: center; border-radius: 7px; cursor: pointer;
    border: 1px solid var(--c-border, #e3e8f1); background: var(--c-bg, #fff); color: var(--c-text-sub, #4a587a);
    font-size: 11px; padding: 0;
}
.vdc-mini.danger:hover { border-color: #ef4444; color: #ef4444; }

.vdc-total { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--c-border, #e3e8f1); }
.vdc-total-label { font-size: 12px; color: var(--c-text-muted, #8a94ab); }
.vdc-total-value { font-size: 22px; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.vdc-total-sub { font-size: 12px; color: var(--c-text-sub, #4a587a); }
.vdc-seg-status { font-size: 12px; color: var(--c-text-muted, #8a94ab); margin-top: 8px; min-height: 16px; }

/* 黑夜模式 */
:root[data-theme="dark"] .vdc-hero { background: #161e33; border-color: #2a3552; }
:root[data-theme="dark"] .vdc-note-pill,
:root[data-theme="dark"] .vdc-solve,
:root[data-theme="dark"] .vdc-out,
:root[data-theme="dark"] .vdc-block,
:root[data-theme="dark"] .vdc-btn,
:root[data-theme="dark"] .vdc-mini,
:root[data-theme="dark"] .vdc-field input,
:root[data-theme="dark"] .vdc-field select,
:root[data-theme="dark"] .vdc-io input,
:root[data-theme="dark"] .vdc-io select { background: #0f1525; border-color: #2a3552; }
:root[data-theme="dark"] .vdc-seg { background: #11182b; border-color: #2a3552; }
:root[data-theme="dark"] .vdc-io .vdc-read { background: rgba(168, 85, 247, .14); border-color: #3b2f5c; }
:root[data-theme="dark"] .vdc-quick button { color: #a9b4cd; border-color: #2a3552; }

.vdc-disclaim {
    background: var(--c-bg-soft, #f6f8fc); border: 1px solid var(--c-border, #e3e8f1);
    border-radius: 12px; padding: 12px 14px; font-size: 13px; color: var(--c-text-sub, #4a587a);
    line-height: 1.75; margin: 6px 0 22px;
}
.vdc-disclaim b { color: var(--c-text, #1f2b45); }
.vdc-info-block { margin-bottom: 26px; }

@media (max-width: 720px) {
    .vdc-inputs { grid-template-columns: 1fr; }
    .vdc-row { grid-template-columns: 1fr; }
    .vdc-row.two { grid-template-columns: 1fr; }
    .vdc-out-value { font-size: 26px; }
}