/* ============================================================
   meter-reading-calc · 水电燃气表读数与费用计算器
   电表黑 + 水表蓝 + 燃气黄 + 表盘读数风（mrc-）
   ============================================================ */
.mrc-page {
    --mrc-dark: #1a2028; --mrc-dark-deep: #0d1116;
    --mrc-blue: #2b6cb0; --mrc-blue-deep: #1a4a80; --mrc-blue-soft: rgba(43,108,176,0.12);
    --mrc-yellow: #d4a017; --mrc-yellow-deep: #9c7510; --mrc-yellow-soft: rgba(212,160,23,0.14);
    --mrc-paper: #ffffff; --mrc-paper-deep: #f4f6fa;
    --mrc-text: #1a2028; --mrc-muted: #6b7280;
    --mrc-line: #e2e8ef; --mrc-line-strong: #bfcad8;
    --mrc-shadow: 0 6px 18px rgba(26,32,40,0.08);
    color: var(--mrc-text); font-size: 15px; line-height: 1.75;
}
[data-theme="dark"] .mrc-page {
    --mrc-dark: #4a5568; --mrc-dark-deep: #718096;
    --mrc-blue: #6ba8e8; --mrc-blue-deep: #a4c4f0; --mrc-blue-soft: rgba(107,168,232,0.14);
    --mrc-yellow: #e8b84a; --mrc-yellow-deep: #f6d898; --mrc-yellow-soft: rgba(232,184,74,0.14);
    --mrc-paper: #22252b; --mrc-paper-deep: #2a2f38;
    --mrc-text: #e8ecf2; --mrc-muted: #939cb0;
    --mrc-line: #30343c; --mrc-line-strong: #444a56;
    --mrc-shadow: 0 6px 18px rgba(0,0,0,0.4);
}
.mrc-page b { color: var(--mrc-dark); }

.mrc-hero { display: grid; grid-template-columns: minmax(0,1.4fr) minmax(220px,1fr) minmax(200px,0.7fr); gap: 22px; align-items: center; padding: 28px 30px 24px; margin-bottom: 22px; border: 1px solid var(--mrc-line); border-radius: 20px; background:
    radial-gradient(90% 120% at 100% 0%, var(--mrc-blue-soft), transparent 55%),
    radial-gradient(70% 100% at 0% 100%, var(--mrc-yellow-soft), transparent 55%),
    var(--mrc-paper); box-shadow: var(--mrc-shadow); }
.mrc-kicker { display: inline-block; padding: 5px 14px; margin-bottom: 12px; border-radius: 8px; background: var(--mrc-dark); color: #fff; font-size: 12px; font-weight: 800; letter-spacing: 0.14em; }
.mrc-hero h1 { margin: 0 0 10px; font-size: clamp(26px,3.4vw,36px); font-weight: 900; }
.mrc-hero-sub { margin: 0 0 14px; max-width: 58ch; color: var(--mrc-muted); }
.mrc-hero-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.mrc-hero-chips li { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--mrc-line-strong); background: var(--mrc-paper-deep); color: var(--mrc-muted); font-size: 12px; font-weight: 700; }

/* Dials */
.mrc-hero-dials { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; }
.mrc-dial { padding: 14px 8px; border-radius: 10px; text-align: center; border: 1.5px solid var(--mrc-line-strong); background: var(--mrc-paper-deep); box-shadow: inset 0 -4px 8px rgba(0,0,0,0.05); }
.mrc-dial-num { font-size: 20px; font-weight: 900; font-family: 'Courier New', monospace; letter-spacing: 0.1em; color: var(--mrc-dark); }
.mrc-dial-label { font-size: 10px; font-weight: 800; color: var(--mrc-muted); margin-top: 4px; letter-spacing: 0.1em; }
.mrc-dial-dark { background: var(--mrc-dark); border-color: var(--mrc-dark); box-shadow: 0 4px 12px rgba(26,32,40,0.2); }
.mrc-dial-dark .mrc-dial-num { color: #ffcc33; }
.mrc-dial-dark .mrc-dial-label { color: #fff; opacity: 0.8; }
.mrc-dial-blue { border-top: 3px solid var(--mrc-blue); }
.mrc-dial-orange { border-top: 3px solid var(--mrc-yellow); }

.mrc-hero-readout { padding: 18px; border: 1px solid var(--mrc-line-strong); border-radius: 14px; border-top: 4px solid var(--mrc-dark); background: var(--mrc-paper-deep); text-align: center; }
.mrc-readout-label { font-size: 11px; font-weight: 800; letter-spacing: 0.14em; color: var(--mrc-muted); }
.mrc-readout-num { font-size: 36px; font-weight: 900; color: var(--mrc-dark); font-variant-numeric: tabular-nums; margin: 6px 0 2px; }
.mrc-readout-avg { font-size: 12px; color: var(--mrc-muted); }

/* Tabs */
.mrc-tabs { display: flex; gap: 6px; margin-bottom: 20px; padding: 6px; border-radius: 12px; background: var(--mrc-paper); border: 1px solid var(--mrc-line); overflow-x: auto; }
.mrc-tab-btn { padding: 10px 14px; border: none; border-radius: 8px; background: transparent; color: var(--mrc-muted); font-size: 12.5px; font-weight: 800; cursor: pointer; white-space: nowrap; }
.mrc-tab-btn:hover { color: var(--mrc-dark); }
.mrc-tab-btn.is-active { background: var(--mrc-dark); color: #fff; }

/* Calc */
.mrc-calc { padding: 20px 22px; margin-bottom: 22px; border: 1px solid var(--mrc-line); border-radius: 16px; background: var(--mrc-paper); box-shadow: var(--mrc-shadow); }
.mrc-field { display: grid; gap: 5px; margin-bottom: 12px; }
.mrc-label { font-size: 12.5px; font-weight: 800; color: var(--mrc-muted); }
.mrc-input-wrap, .mrc-select-wrap { position: relative; }
.mrc-input { width: 100%; padding: 10px 12px; border: 1.5px solid var(--mrc-line-strong); border-radius: 8px; background: var(--mrc-paper-deep); color: var(--mrc-text); font-size: 14px; font-weight: 600; outline: none; font-family: 'Courier New', monospace; letter-spacing: 0.03em; }
.mrc-input:focus { border-color: var(--mrc-dark); box-shadow: 0 0 0 3px rgba(26,32,40,0.08); }
select.mrc-input { font-family: inherit; 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='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/></svg>"); background-repeat: no-repeat; background-position: right 10px center; }
.mrc-input-wrap .mrc-unit { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); font-size: 12px; font-weight: 700; color: var(--mrc-muted); pointer-events: none; font-family: inherit; }

.mrc-grid2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.mrc-grid3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.mrc-rate-row { display: grid; grid-template-columns: 80px 1fr 100px; gap: 10px; align-items: center; padding: 10px; border-radius: 8px; background: var(--mrc-paper-deep); border: 1px solid var(--mrc-line); margin-bottom: 8px; font-size: 12px; font-weight: 600; }

/* Result */
.mrc-result { margin-bottom: 24px; padding: 20px 22px; border-radius: 16px; background: linear-gradient(135deg, var(--mrc-paper), var(--mrc-paper-deep)); border: 1px solid var(--mrc-line); box-shadow: var(--mrc-shadow); }
.mrc-result-box { font-size: 14px; line-height: 1.8; }
.mrc-result-total { font-size: 30px; font-weight: 900; color: var(--mrc-dark); font-variant-numeric: tabular-nums; }
.mrc-breakdown { display: grid; gap: 6px; margin-top: 10px; padding: 12px; border-radius: 8px; background: var(--mrc-paper-deep); }
.mrc-break-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; font-size: 12.5px; color: var(--mrc-muted); }
.mrc-break-row b { color: var(--mrc-dark); }

.mrc-anomaly { margin-top: 14px; padding: 12px 14px; border-radius: 10px; background: rgba(194,69,69,0.10); border-left: 4px solid var(--mrc-dark); font-size: 13px; color: var(--mrc-dark); font-weight: 700; line-height: 1.8; }
.mrc-anomaly.mrc-ok { background: rgba(79,140,107,0.12); color: #36654a; border-left-color: #4f8c6b; }

/* Guide */
.mrc-dial-guide { margin-bottom: 24px; }
.mrc-guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.mrc-guide-card { padding: 18px; border: 1px solid var(--mrc-line); border-radius: 14px; background: var(--mrc-paper); box-shadow: var(--mrc-shadow); }
.mrc-guide-card h3 { margin: 0 0 8px; font-size: 14px; font-weight: 900; color: var(--mrc-dark); }
.mrc-guide-card p { margin: 0; font-size: 12.5px; color: var(--mrc-muted); line-height: 1.8; }

.mrc-section-head { margin-bottom: 12px; }
.mrc-section-kicker { font-size: 11px; font-weight: 900; letter-spacing: 0.18em; color: var(--mrc-dark); }
.mrc-section-head h2 { margin: 4px 0 4px; font-size: 20px; font-weight: 900; }

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

@media (max-width: 1080px) {
    .mrc-hero { grid-template-columns: minmax(0,1fr); }
    .mrc-guide-grid { grid-template-columns: minmax(0,1fr); }
    .mrc-grid2, .mrc-grid3 { grid-template-columns: minmax(0,1fr); }
}