/* ============================================================
   room-warmup-calc · 房间升温降温时间计算器
   温控面板风（rwc-）：冷暖渐变 + 温度计水银 + 深灰面板
   ============================================================ */
.rwc-page {
    --rwc-cool: #2b8ec0; --rwc-cool-deep: #1a6b96; --rwc-cool-soft: rgba(43,142,192,0.14);
    --rwc-warm: #e88a3a; --rwc-warm-deep: #b45d15; --rwc-warm-soft: rgba(232,138,58,0.14);
    --rwc-panel: #1a2028; --rwc-panel-deep: #0d1116; --rwc-panel-text: #e8ecf2;
    --rwc-paper: #ffffff; --rwc-paper-deep: #f4f6fa;
    --rwc-text: #1a2028; --rwc-muted: #6a7480;
    --rwc-line: #e2e8ef; --rwc-line-strong: #bfcad8;
    --rwc-shadow: 0 6px 18px rgba(26,32,40,0.08);
    color: var(--rwc-text); font-size: 15px; line-height: 1.75;
}
[data-theme="dark"] .rwc-page {
    --rwc-cool: #5fbfe8; --rwc-cool-deep: #a4dcff; --rwc-cool-soft: rgba(95,191,232,0.14);
    --rwc-warm: #f0a364; --rwc-warm-deep: #f6c09a; --rwc-warm-soft: rgba(240,163,100,0.14);
    --rwc-panel: #4a5568; --rwc-panel-deep: #2d3748; --rwc-panel-text: #fff;
    --rwc-paper: #22252b; --rwc-paper-deep: #2a2f38;
    --rwc-text: #e8ecf2; --rwc-muted: #939cb0;
    --rwc-line: #30343c; --rwc-line-strong: #444a56;
    --rwc-shadow: 0 6px 18px rgba(0,0,0,0.4);
}
.rwc-page b { color: var(--rwc-cool-deep); }

.rwc-hero { display: grid; grid-template-columns: minmax(0,1.4fr) minmax(180px,0.9fr) minmax(200px,0.7fr); gap: 22px; align-items: center; padding: 28px 30px 24px; margin-bottom: 22px; border: 1px solid var(--rwc-line); border-radius: 20px; background:
    linear-gradient(135deg, var(--rwc-cool-soft) 0%, transparent 50%),
    linear-gradient(315deg, var(--rwc-warm-soft) 0%, transparent 50%),
    var(--rwc-paper); box-shadow: var(--rwc-shadow); }
.rwc-kicker { display: inline-block; padding: 5px 14px; margin-bottom: 12px; border-radius: 8px; background: var(--rwc-panel); color: #fff; font-size: 12px; font-weight: 800; letter-spacing: 0.14em; }
.rwc-hero h1 { margin: 0 0 10px; font-size: clamp(26px,3.4vw,36px); font-weight: 900; }
.rwc-hero-sub { margin: 0 0 14px; max-width: 58ch; color: var(--rwc-muted); }
.rwc-hero-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.rwc-hero-chips li { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--rwc-line-strong); background: var(--rwc-paper-deep); color: var(--rwc-muted); font-size: 12px; font-weight: 700; }

/* Thermometer (unique visual) */
.rwc-hero-thermo { display: grid; place-items: center; }
.rwc-thermo-outer { width: 100px; padding: 16px 0 12px; border-radius: 40px; background: var(--rwc-panel); box-shadow: 0 8px 20px rgba(0,0,0,0.3), inset 0 -4px 12px rgba(0,0,0,0.4); }
.rwc-thermo-inner { width: 36px; height: 110px; margin: 0 auto; border-radius: 18px; background: var(--rwc-panel-deep); position: relative; overflow: hidden; }
.rwc-thermo-mercury { position: absolute; bottom: 0; left: 0; right: 0; height: 50%; background: linear-gradient(to top, var(--rwc-warm), var(--rwc-cool)); border-radius: 18px; transition: height 0.3s ease; }
.rwc-thermo-temp { text-align: center; margin-top: 10px; font-size: 22px; font-weight: 900; color: #fff; font-variant-numeric: tabular-nums; }

.rwc-hero-readout { padding: 18px; border: 1px solid var(--rwc-line-strong); border-radius: 14px; border-top: 4px solid var(--rwc-cool); background: var(--rwc-paper-deep); text-align: center; }
.rwc-readout-label { font-size: 11px; font-weight: 800; letter-spacing: 0.14em; color: var(--rwc-muted); }
.rwc-readout-num { font-size: 26px; font-weight: 900; color: var(--rwc-cool-deep); margin: 6px 0 2px; }
.rwc-readout-avg { font-size: 12px; color: var(--rwc-muted); }

/* Calc */
.rwc-calc { display: grid; grid-template-columns: minmax(0,1fr) minmax(280px,0.85fr); gap: 22px; margin-bottom: 22px; }
.rwc-panel { padding: 20px; border: 1px solid var(--rwc-line); border-radius: 16px; background: var(--rwc-paper); box-shadow: var(--rwc-shadow); margin-bottom: 14px; }
.rwc-panel-head { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 14px; }
.rwc-step { flex: none; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 8px; background: var(--rwc-panel); color: #fff; font-size: 13px; font-weight: 900; }
.rwc-panel-head h2 { margin: 0 0 2px; font-size: 16px; font-weight: 900; }
.rwc-panel-head p { margin: 0; font-size: 12px; color: var(--rwc-muted); }

.rwc-grid3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
.rwc-field { display: grid; gap: 5px; }
.rwc-label { font-size: 12px; font-weight: 800; color: var(--rwc-muted); }
.rwc-input-wrap, .rwc-select-wrap { position: relative; }
.rwc-input { width: 100%; padding: 10px 12px; border: 1.5px solid var(--rwc-line-strong); border-radius: 8px; background: var(--rwc-paper-deep); color: var(--rwc-text); font-size: 14px; font-weight: 600; outline: none; }
.rwc-input:focus { border-color: var(--rwc-cool); box-shadow: 0 0 0 3px var(--rwc-cool-soft); }
select.rwc-input { padding-right: 28px; appearance: none; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%236a7480' stroke-width='1.5' fill='none' stroke-linecap='round'/></svg>"); background-repeat: no-repeat; background-position: right 10px center; }
.rwc-input-wrap .rwc-unit { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); font-size: 11px; font-weight: 700; color: var(--rwc-muted); pointer-events: none; }

/* Result */
.rwc-result-col { position: sticky; top: 20px; align-self: start; }
.rwc-result-hero { padding: 20px; border-radius: 16px; background: var(--rwc-panel); color: var(--rwc-panel-text); text-align: center; box-shadow: 0 8px 20px rgba(0,0,0,0.3); margin-bottom: 12px; }
.rwc-rh-label { font-size: 11px; font-weight: 800; letter-spacing: 0.14em; opacity: 0.7; }
.rwc-rh-num { font-size: 30px; font-weight: 900; margin: 8px 0 2px; font-variant-numeric: tabular-nums; }
.rwc-rh-sub { font-size: 12px; opacity: 0.8; }
.rwc-kpis { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; margin-bottom: 12px; }
.rwc-kpi { padding: 10px; border: 1px solid var(--rwc-line); border-radius: 10px; background: var(--rwc-paper); text-align: center; }
.rwc-kpi span { display: block; font-size: 10px; font-weight: 800; color: var(--rwc-muted); letter-spacing: 0.06em; }
.rwc-kpi b { display: block; font-size: 16px; font-weight: 900; color: var(--rwc-cool-deep); font-variant-numeric: tabular-nums; margin-top: 4px; }
.rwc-verdict { padding: 14px 16px; border-radius: 12px; font-size: 13px; line-height: 1.8; margin-bottom: 12px; }
.rwc-verdict.is-cool { background: var(--rwc-cool-soft); border-left: 4px solid var(--rwc-cool-deep); color: var(--rwc-cool-deep); }
.rwc-verdict.is-warm { background: var(--rwc-warm-soft); border-left: 4px solid var(--rwc-warm-deep); color: var(--rwc-warm-deep); }
.rwc-mini-card { padding: 14px 16px; border: 1px solid var(--rwc-line); border-radius: 12px; background: var(--rwc-paper); box-shadow: var(--rwc-shadow); }
.rwc-mini-card h3 { margin: 0 0 8px; font-size: 13px; font-weight: 900; color: var(--rwc-cool-deep); }
.rwc-mini-card p { margin: 0; font-size: 12.5px; color: var(--rwc-muted); line-height: 1.8; }

/* Tips */
.rwc-tips { margin-bottom: 24px; padding: 22px 24px; border-radius: 18px; background: var(--rwc-paper); border: 1px solid var(--rwc-line); box-shadow: var(--rwc-shadow); }
.rwc-section-head { margin-bottom: 12px; }
.rwc-section-kicker { font-size: 11px; font-weight: 900; letter-spacing: 0.18em; color: var(--rwc-cool-deep); }
.rwc-section-head h2 { margin: 4px 0 4px; font-size: 20px; font-weight: 900; }
.rwc-tips-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.rwc-tip { padding: 16px; border-radius: 12px; border-top: 4px solid var(--rwc-cool); background: var(--rwc-paper-deep); }
.rwc-tip:last-child { border-top-color: var(--rwc-warm); }
.rwc-tip h3 { margin: 0 0 8px; font-size: 14px; font-weight: 900; }
.rwc-tip ul { margin: 0; padding-left: 18px; font-size: 12.5px; color: var(--rwc-muted); line-height: 1.9; }

.rwc-top { position: fixed; right: 26px; bottom: 30px; width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--rwc-line-strong); border-radius: 10px; background: var(--rwc-paper); color: var(--rwc-cool-deep); font-size: 17px; font-weight: 900; cursor: pointer; box-shadow: var(--rwc-shadow); opacity: 0; pointer-events: none; transition: opacity 0.25s ease, transform 0.15s ease; z-index: 60; }
.rwc-top.is-show { opacity: 1; pointer-events: auto; }

@media (max-width: 1080px) {
    .rwc-hero { grid-template-columns: minmax(0,1fr); }
    .rwc-calc { grid-template-columns: minmax(0,1fr); }
    .rwc-result-col { position: static; }
    .rwc-tips-grid { grid-template-columns: minmax(0,1fr); }
    .rwc-grid3 { grid-template-columns: minmax(0,1fr); }
}