/* ============================================================
 * 分贝监测仪 /tools/decibel_meter
 * 设计：复刻 AI225「分贝仪」的卡片化布局 + 专业声级计增强
 * 主题：跟随站点 --accent 等变量（深色为默认，浅色 [data-theme=light]）
 * ============================================================ */
.dmb-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 20px 48px;
    box-sizing: border-box;
    width: 100%;
}

/* ---------- 顶部 ---------- */
.dmb-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}
.dmb-top-l { display: flex; gap: 14px; align-items: center; }
.dmb-logo {
    width: 52px; height: 52px; flex: none;
    border-radius: 14px;
    display: grid; place-items: center;
    font-size: 28px;
    background: linear-gradient(135deg, rgba(29,155,240,.18), rgba(29,155,240,.06));
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.dmb-top-t h1 { font-size: 22px; margin: 0 0 4px; line-height: 1.2; }
.dmb-top-t p { margin: 0; color: var(--text-secondary); font-size: 13px; }
.dmb-top-r { display: flex; gap: 10px; flex: none; }

/* ---------- 主体两栏 ---------- */
.dmb-body {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}
.dmb-left, .dmb-right { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

/* ---------- 卡片 ---------- */
.dmb-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 18px;
}
.dmb-card-h {
    display: flex; align-items: center; justify-content: space-between;
    gap: 10px; margin-bottom: 14px;
}
.dmb-card-h h2 { font-size: 15px; margin: 0; font-weight: 700; }
.dmb-card-sub { color: var(--text-secondary); font-size: 12.5px; margin: -8px 0 12px; }

/* ---------- 状态徽标 ---------- */
.dmb-status {
    font-size: 12px; padding: 4px 10px; border-radius: 999px;
    border: 1px solid var(--border-color); color: var(--text-secondary);
    display: inline-flex; align-items: center; gap: 6px;
}
.dmb-status::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--text-secondary); }
.dmb-status.is-on { color: #1db954; border-color: color-mix(in srgb, #1db954 40%, transparent); }
.dmb-status.is-on::before { background: #1db954; box-shadow: 0 0 0 0 rgba(29,185,84,.5); animation: dmb-pulse 1.4s infinite; }
.dmb-status.is-err { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, transparent); }
.dmb-status.is-err::before { background: var(--danger); }
@keyframes dmb-pulse { 0% { box-shadow: 0 0 0 0 rgba(29,185,84,.5); } 70% { box-shadow: 0 0 0 7px rgba(29,185,84,0); } 100% { box-shadow: 0 0 0 0 rgba(29,185,84,0); } }

/* ---------- 主读数 ---------- */
.dmb-readout { display: flex; flex-direction: column; align-items: center; gap: 6px; margin: 6px 0 4px; }
.dmb-num {
    font-size: 64px; font-weight: 800; line-height: 1; letter-spacing: -1px;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(180deg, var(--text-primary), color-mix(in srgb, var(--accent) 70%, var(--text-primary)));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.dmb-unit { font-size: 16px; color: var(--text-secondary); font-weight: 600; }
.dmb-weight-tag {
    font-size: 12px; padding: 2px 9px; border-radius: 999px;
    background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent);
    font-weight: 700; letter-spacing: .5px;
}

/* ---------- 噪声等级 ---------- */
.dmb-level {
    align-self: center; font-size: 14px; font-weight: 700; padding: 5px 14px;
    border-radius: 999px; margin-bottom: 8px;
}
.dmb-level.lv-0 { background: rgba(29,185,84,.14); color: #1db954; }
.dmb-level.lv-1 { background: rgba(29,185,84,.14); color: #1db954; }
.dmb-level.lv-2 { background: rgba(29,185,84,.14); color: #1db954; }
.dmb-level.lv-3 { background: rgba(244,194,13,.16); color: #d9a900; }
.dmb-level.lv-4 { background: rgba(255,140,0,.16); color: #ff8c00; }
.dmb-level.lv-5 { background: rgba(244,33,46,.16); color: var(--danger); }
.dmb-level.lv-6 { background: rgba(244,33,46,.22); color: var(--danger); }

/* ---------- 刻度条仪表 ---------- */
.dmb-gauge {
    position: relative; height: 26px; border-radius: 999px; overflow: hidden;
    background: linear-gradient(90deg,
        #1db954 0%, #1db954 28%,
        #f4c20d 50%, #f4c20d 64%,
        #ff8c00 78%, #f4212e 100%);
    margin: 6px 0 4px;
}
.dmb-gauge-empty {
    position: absolute; inset: 0; right: auto; background: color-mix(in srgb, var(--bg-secondary) 88%, transparent);
    /* 该层覆盖刻度之外区域由 JS 控制宽度 */
}
.dmb-gauge-mark {
    position: absolute; top: -3px; bottom: -3px; width: 3px; border-radius: 3px;
    background: var(--text-primary); box-shadow: 0 0 0 2px color-mix(in srgb, var(--bg-secondary) 80%, transparent);
    transition: left .05s linear;
}
.dmb-gauge-scale { display: flex; justify-content: space-between; color: var(--text-secondary); font-size: 11px; margin-top: 4px; }

/* ---------- 画布 ---------- */
.dmb-canvas-wrap { position: relative; }
.dmb-canvas-wrap canvas { display: block; width: 100%; }
.dmb-trend { height: 120px; }
.dmb-spectrum { height: 130px; margin-top: 4px; }
.dmb-canvas-label { font-size: 12px; color: var(--text-secondary); margin: 10px 0 4px; display: flex; justify-content: space-between; }

/* ---------- 统计网格 ---------- */
.dmb-stats {
    display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 10px;
    margin-top: 14px;
}
.dmb-stat { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 12px; padding: 10px; text-align: center; }
.dmb-stat-k { font-size: 11px; color: var(--text-secondary); }
.dmb-stat-v { font-size: 20px; font-weight: 800; font-variant-numeric: tabular-nums; margin-top: 2px; }
.dmb-stat-v small { font-size: 11px; font-weight: 600; color: var(--text-secondary); margin-left: 2px; }

/* ---------- 操作按钮 ---------- */
.dmb-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.dmb-btn {
    font: inherit; cursor: pointer; border-radius: 999px; padding: 9px 18px;
    border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-primary);
    font-weight: 600; transition: background .15s, border-color .15s, opacity .15s;
}
.dmb-btn:hover { background: var(--bg-hover); }
.dmb-btn-pri { background: var(--accent); border-color: var(--accent); color: #fff; }
.dmb-btn-pri:hover { background: var(--accent-hover); }
.dmb-btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, transparent); }
.dmb-btn-sm { padding: 6px 12px; font-size: 13px; }
.dmb-btn[hidden] { display: none; }

.dmb-tip { color: var(--text-secondary); font-size: 12.5px; margin-top: 12px; line-height: 1.6; }

/* ---------- 设置 ---------- */
.dmb-field { margin-bottom: 14px; }
.dmb-field > label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 7px; }
.dmb-seg { display: flex; gap: 6px; flex-wrap: wrap; }
.dmb-seg button {
    flex: 1 1 auto; min-width: 56px; font: inherit; cursor: pointer; padding: 8px 10px;
    border-radius: 10px; border: 1px solid var(--border-color); background: var(--bg-primary);
    color: var(--text-primary); font-size: 13px; transition: all .15s;
}
.dmb-seg button:hover { background: var(--bg-hover); }
.dmb-seg button.is-on { background: color-mix(in srgb, var(--accent) 16%, transparent); border-color: var(--accent); color: var(--accent); font-weight: 700; }
.dmb-row { display: flex; align-items: center; gap: 10px; }
.dmb-row input[type="number"] {
    font: inherit; width: 88px; padding: 8px 10px; border-radius: 10px;
    border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-primary);
}
.dmb-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.dmb-field-sw { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.dmb-field-sw label { margin: 0; }
.dmb-sw-tip { display: block; font-size: 11.5px; color: var(--text-secondary); margin-top: 5px; }

/* ---------- 噪声等级参考表 ---------- */
.dmb-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.dmb-table th, .dmb-table td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--border-color); }
.dmb-table th { color: var(--text-secondary); font-weight: 600; }
.dmb-table td.dmb-lv-dot { font-weight: 700; }

/* ---------- 功能特点 / 列表 ---------- */
.dmb-feat-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 9px; }
.dmb-feat-list li { display: flex; gap: 9px; font-size: 13px; color: var(--text-primary); align-items: flex-start; }
.dmb-feat-list .ic { flex: none; }
.dmb-note { color: var(--text-secondary); font-size: 12px; line-height: 1.6; margin-top: 10px; }

/* ---------- 文档区 ---------- */
.dmb-doc { margin-top: 22px; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.dmb-doc-col h2 { font-size: 16px; margin: 0 0 8px; }
.dmb-doc-col h3 { font-size: 14px; margin: 14px 0 6px; }
.dmb-doc-col p { color: var(--text-secondary); font-size: 13px; line-height: 1.7; margin: 0 0 8px; }
.dmb-doc-col ol, .dmb-doc-col ul { color: var(--text-secondary); font-size: 13px; line-height: 1.7; padding-left: 18px; margin: 0 0 8px; }
.dmb-faq { border-top: 1px solid var(--border-color); padding: 10px 0; }
.dmb-faq summary { cursor: pointer; font-weight: 600; font-size: 13.5px; }
.dmb-faq p { margin: 8px 0 0; }
.dmb-doc-warn { background: color-mix(in srgb, var(--danger) 8%, transparent); border: 1px solid color-mix(in srgb, var(--danger) 25%, transparent); border-radius: 12px; padding: 14px; }
.dmb-doc-warn h2 { color: var(--danger); }

.dmb-disclaimer { color: var(--text-secondary); font-size: 12px; line-height: 1.7; margin: 22px auto 0; max-width: 900px; text-align: center; }

/* ---------- 弹窗 / 抽屉 / Toast ---------- */
.dmb-mask { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: grid; place-items: center; z-index: 1200; padding: 16px; }
.dmb-mask[hidden] { display: none !important; }
.dmb-modal { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 16px; width: 100%; max-width: 440px; max-height: 90vh; overflow: auto; padding: 18px; }
.dmb-modal-h { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.dmb-modal-h h3 { margin: 0; font-size: 17px; }
.dmb-x { background: none; border: 0; color: var(--text-secondary); font-size: 20px; cursor: pointer; line-height: 1; }
.dmb-modal-f { display: flex; gap: 10px; margin-top: 16px; align-items: center; }
.dmb-mask-right { place-items: stretch; justify-content: flex-end; padding: 0; background: rgba(0,0,0,.45); }
.dmb-drawer { background: var(--bg-secondary); width: min(420px, 92vw); height: 100%; overflow: auto; padding: 18px; animation: dmb-slide .22s ease; }
@keyframes dmb-slide { from { transform: translateX(100%); } to { transform: translateX(0); } }
.dmb-hist-stat { color: var(--text-secondary); font-size: 13px; margin-bottom: 10px; }
.dmb-hist-bar { display: flex; gap: 8px; margin-bottom: 12px; }
.dmb-hist-list { display: flex; flex-direction: column; gap: 8px; }
.dmb-hist-item { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 12px; padding: 10px 12px; }
.dmb-hist-main { display: flex; justify-content: space-between; align-items: baseline; }
.dmb-hist-db { font-size: 18px; font-weight: 800; font-variant-numeric: tabular-nums; }
.dmb-hist-time { font-size: 11.5px; color: var(--text-secondary); }
.dmb-hist-sub { font-size: 11.5px; color: var(--text-secondary); margin-top: 3px; }
.dmb-hist-empty { text-align: center; color: var(--text-secondary); padding: 30px 0; }
.dmb-hist-empty-ic { font-size: 34px; margin-bottom: 8px; }

.dmb-toast { position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%); background: var(--bg-secondary); border: 1px solid var(--border-color); color: var(--text-primary); padding: 10px 16px; border-radius: 12px; font-size: 13px; z-index: 1400; max-width: 90vw; box-shadow: 0 10px 30px rgba(0,0,0,.3); }
.dmb-toast[hidden] { display: none !important; }
.dmb-toast.err { border-color: color-mix(in srgb, var(--danger) 45%, transparent); color: var(--danger); }

/* ---------- 响应式 ---------- */
@media (max-width: 991px) {
    .dmb-body { grid-template-columns: 1fr; }
}
@media (max-width: 767px) {
    .dmb-page { padding: 14px 14px 40px; }
    .dmb-top-t h1 { font-size: 19px; }
    .dmb-top-r .dmb-btn { padding: 8px 12px; font-size: 13px; }
    .dmb-num { font-size: 52px; }
    .dmb-stats { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .dmb-doc { grid-template-columns: 1fr; }
    .dmb-btn, .dmb-row input[type="number"] { font-size: 16px; } /* iOS 聚焦不缩放 */
}
@media (max-width: 460px) {
    .dmb-actions .dmb-btn { flex: 1 1 100%; }
    .dmb-top { flex-direction: column; }
}