:root { --primary: #005f5f; --accent: #b8860b; --text: #2d3436; }
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', sans-serif; background: #f0f4f3; }

.page-header { background: linear-gradient(135deg, var(--primary), #008080); color:#fff; padding:44px 0 40px; margin:0; }
.page-header > .container-xl { max-width:1320px; margin:0 auto; padding-left:16px; padding-right:16px; }
@media (min-width:1400px) { .page-header > .container-xl { max-width:1320px; } }
.breadcrumb { font-size:13px; opacity:.75; margin-bottom:10px; }
.breadcrumb a { color:#fff; text-decoration:none; }
.page-header h1 { font-size:30px; font-weight:800; margin:0 0 6px; }
.page-header p { font-size:15px; opacity:.88; }

.wrap { max-width:960px; margin:36px auto 60px; padding:0 20px; }
.grid2 { display:grid; grid-template-columns:1fr 1fr; gap:22px; align-items:start; }
.card { background:#fff; border-radius:14px; padding:26px 28px; box-shadow:0 4px 14px rgba(0,0,0,.06); }
.card h2 { font-size:17px; color:var(--primary); font-weight:700; border-bottom:2px solid #e4f0f0; padding-bottom:10px; margin-bottom:20px; }

/* 12 month grid */
.month-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px 18px; margin-bottom:20px; }
.month-row { display:flex; align-items:center; gap:10px; }
.month-lbl { font-size:13px; font-weight:600; color:#555; white-space:nowrap; min-width:60px; }
.month-input { flex:1; padding:9px 12px; border:1.5px solid #ddd; border-radius:8px; font-size:14px; color:var(--text); background:#fafafa; transition:.2s; }
.month-input:focus { outline:none; border-color:var(--primary); background:#fff; }
.month-input.filled { border-color:#a0cdc8; background:#f5fbfa; }

.divider { border:none; border-top:1px dashed #cde; margin:16px 0; }

.fg { margin-bottom:18px; }
label { display:block; font-size:13px; font-weight:600; color:#555; margin-bottom:6px; }
input[type=number] { width:100%; padding:11px 14px; border:1.5px solid #ddd; border-radius:9px; font-size:15px; color:var(--text); background:#fafafa; transition:.2s; -webkit-appearance:none; }
input[type=number]:focus { outline:none; border-color:var(--primary); background:#fff; }
.hint { font-size:12px; color:#aaa; margin-top:4px; }

.btn-calc { width:100%; padding:13px; background:var(--primary); color:#fff; border:none; border-radius:10px; font-size:16px; font-weight:700; cursor:pointer; transition:.2s; margin-top:4px; }
.btn-calc:hover { background:#004848; }
.btn-reset { width:100%; padding:9px; background:#f0f0f0; color:#666; border:none; border-radius:9px; font-size:14px; font-weight:600; cursor:pointer; margin-top:8px; }
.btn-reset:hover { background:#e2e2e2; }

/* Summary in input card */
.live-sum { background:#f0f8f7; border:1px solid #c8e6e4; border-radius:10px; padding:12px 16px; margin-bottom:16px; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:8px; }
.live-sum .ls-item { text-align:center; }
.live-sum .ls-lbl { font-size:11px; color:#888; font-weight:600; text-transform:uppercase; letter-spacing:.4px; }
.live-sum .ls-val { font-size:16px; font-weight:700; color:var(--primary); }

/* Algorithm card */
.algo-step { display:flex; gap:14px; align-items:flex-start; margin-bottom:16px; }
.algo-num { width:28px; height:28px; border-radius:50%; background:var(--primary); color:#fff; font-size:13px; font-weight:700; display:flex; align-items:center; justify-content:center; flex-shrink:0; margin-top:1px; }
.algo-body .algo-title { font-size:14px; font-weight:700; color:var(--text); margin-bottom:3px; }
.algo-body .algo-formula { font-size:13px; color:#555; background:#f5fbfa; border-left:3px solid var(--primary); padding:6px 10px; border-radius:0 6px 6px 0; font-family:monospace; }

/* Result */
.result-wrap { margin-top:24px; }
.result-card { background:#fff; border-radius:14px; box-shadow:0 4px 14px rgba(0,0,0,.06); overflow:hidden; }
.rc-head { background:var(--primary); color:#fff; padding:18px 28px; }
.rc-head h3 { font-size:17px; font-weight:700; margin:0 0 4px; }
.rc-head p { font-size:13px; opacity:.8; margin:0; }
.rc-body { padding:22px 28px; }

.stat-row { display:grid; grid-template-columns:repeat(5,1fr); gap:12px; margin-bottom:24px; }
@media (max-width:900px) { .stat-row { grid-template-columns:repeat(2,1fr); } }
@media (max-width:520px) { .stat-row { grid-template-columns:1fr; } }
.sbox { background:#f7fbfb; border:1px solid #ddeeed; border-radius:10px; padding:13px 15px; }
.sbox .sl { font-size:11px; color:#888; font-weight:700; text-transform:uppercase; letter-spacing:.4px; margin-bottom:5px; }
.sbox .sv { font-size:19px; font-weight:700; color:var(--primary); }
.sbox.highlight { background:var(--primary); border-color:var(--primary); }
.sbox.highlight .sl { color:rgba(255,255,255,.75); }
.sbox.highlight .sv { color:#fff; font-size:24px; }

.detail-table { width:100%; border-collapse:collapse; font-size:14px; margin-bottom:20px; }
.detail-table th { background:#f0f6f6; padding:10px 14px; text-align:left; color:var(--primary); font-weight:700; border-bottom:2px solid #cde; }
.detail-table td { padding:9px 14px; border-bottom:1px solid #f2f2f2; }
.detail-table .total-row td { background:#f0f6f6; font-weight:700; font-size:15px; color:var(--primary); border-top:2px solid #cde; border-bottom:none; }
.detail-table .plus { color:#229954; }

.monthly-breakdown { margin-top:4px; }
.mb-toggle { background:none; border:1px solid #cde; color:var(--primary); padding:7px 16px; border-radius:7px; font-size:13px; font-weight:600; cursor:pointer; }
.mb-toggle:hover { background:#f0f8f8; }
.mb-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:8px; margin-top:12px; }
.mb-item { background:#f7fbfb; border:1px solid #e0eeed; border-radius:8px; padding:9px 12px; }
.mb-item .mb-m { font-size:11px; color:#999; font-weight:600; }
.mb-item .mb-v { font-size:14px; font-weight:700; color:var(--text); }
.mb-item.zero .mb-v { color:#ccc; }

.info-note { background:#e8f5f5; border-left:4px solid var(--primary); border-radius:0 8px 8px 0; padding:12px 16px; margin-top:18px; font-size:13px; color:#004040; line-height:1.6; }

.law-block { background:#f8f9ff; border:1px solid #c8d4f0; border-radius:10px; overflow:hidden; margin-top:4px; }
.law-title { background:#3a5ca8; color:#fff; font-size:13px; font-weight:700; padding:9px 14px; letter-spacing:.3px; }
.law-body { padding:14px; font-size:12.5px; color:#333; line-height:1.75; }
.law-body p { margin-bottom:10px; }
.law-body p:last-child { margin-bottom:0; }
.hidden { display:none; }