:root {
  --brand-red: #DA1F24;
  --brand-red-dark: #B5181C;
  --brand-blue: #313A88;
  --brand-blue-dark: #232A66;
  --brand-gray: #666666;
  --bg: #F4F6FA;
  --card: #FFFFFF;
  --border: #E5E7EB;
  --text: #1F2937;
  --text-light: #6B7280;
  --success: #16A34A;
  --warning: #F59E0B;
  --input-bg: #FFFBEB;
  --input-border: #FCD34D;
  --calc-bg: #F9FAFB;
  --peak-color: #DC2626;
  --mid-color: #F59E0B;
  --off-color: #16A34A;
  --public-color: #7C3AED;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
  --radius: 12px;
  --radius-sm: 8px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Vazirmatn","Tahoma","Arial",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;font-size:14px;
  font-feature-settings:"ss01" on,"ss02" on;min-height:100vh;
}

/* ── Header ── */
.header{
  background:linear-gradient(135deg,#FFF 0%,#F8FAFC 100%);
  border-bottom:4px solid;
  border-image:linear-gradient(90deg,var(--brand-red) 0%,var(--brand-red) 38%,var(--brand-blue) 38%,var(--brand-blue) 100%) 1;
  padding:20px 32px;box-shadow:var(--shadow-sm);
}
.header-inner{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
}
.logo{height:50px;width:auto;display:block}
.header-title{flex:1;text-align:center;min-width:220px}
.header-title h1{color:var(--brand-blue);font-size:20px;font-weight:700;margin-bottom:2px}
.header-title .subtitle{color:var(--brand-gray);font-size:12px;font-weight:400}
.header-tag{background:var(--brand-blue);color:white;padding:6px 14px;border-radius:20px;font-size:11px;font-weight:600;white-space:nowrap}

/* ── Main Section Tabs (برق / آب) ── */
.main-tabs-wrap{max-width:1200px;margin:20px auto 0;padding:0 20px}
.main-tabs{display:flex;gap:8px;margin-bottom:14px}
.main-tab{
  flex:1;padding:14px 20px;border-radius:var(--radius);cursor:pointer;text-align:center;
  background:var(--card);border:2px solid var(--border);font-weight:700;
  font-size:16px;color:var(--text-light);transition:all .15s;font-family:inherit;box-shadow:var(--shadow-sm);
}
.main-tab:hover{background:#EFF6FF;border-color:var(--brand-blue)}
.main-tab.active{background:linear-gradient(135deg,var(--brand-blue) 0%,var(--brand-blue-dark) 100%);color:white;border-color:var(--brand-blue);box-shadow:0 4px 12px rgba(49,58,136,0.3)}
.main-tab .icon{font-size:22px;vertical-align:middle;margin-left:8px}

/* ── Sub Tabs ── */
.sub-tabs-wrap{max-width:1200px;margin:0 auto;padding:0 20px}
#section-water .sub-tabs-wrap{margin-top:20px}
.sub-tabs{
  display:flex;gap:4px;background:white;border-radius:var(--radius);
  padding:6px;box-shadow:var(--shadow-md);margin-bottom:16px;overflow-x:auto;
}
.sub-tab{
  flex:1;padding:12px 16px;background:transparent;border:none;border-radius:var(--radius-sm);
  color:var(--text-light);font-family:inherit;font-size:14px;font-weight:700;
  cursor:pointer;transition:all 0.2s;white-space:nowrap;text-align:center;
}
.sub-tab:hover{background:var(--calc-bg)}
.sub-tab.active{
  background:linear-gradient(135deg,var(--brand-red) 0%,var(--brand-red-dark) 100%);
  color:white;box-shadow:0 4px 12px rgba(218,31,36,0.25);
}
.sub-tab .icon{font-size:18px;vertical-align:middle;margin-left:6px}

.container{max-width:1200px;margin:0 auto;padding:0 20px 48px}

/* ── Cards ── */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);overflow:hidden;margin-bottom:16px;transition:box-shadow 0.2s}
.card:hover{box-shadow:var(--shadow-lg)}
.card-hdr{padding:14px 20px;background:var(--brand-blue);color:white;font-size:14px;font-weight:700;display:flex;align-items:center;gap:10px}
.card-hdr .num{background:rgba(255,255,255,0.18);width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.card-hdr .badge{background:var(--warning);color:#1F2937;padding:2px 10px;border-radius:20px;font-size:11px}
.card-body{padding:16px 20px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
@media(max-width:768px){.grid-2,.grid-3{grid-template-columns:1fr}}

/* ── Forms ── */
.form-row{
  display:grid;grid-template-columns:minmax(130px,1fr) minmax(130px,1fr);
  gap:6px 14px;align-items:center;margin-bottom:10px;
}
.form-row:last-child{margin-bottom:0}
.form-row label{color:var(--text);font-size:13px;font-weight:500}
.form-row label .hint{display:block;font-size:11px;color:var(--text-light);font-weight:400;margin-top:1px}
.form-row input,.form-row select{
  width:100%;padding:9px 12px;border:1.5px solid var(--input-border);border-radius:var(--radius-sm);
  background:var(--input-bg);color:var(--brand-blue);font-size:13px;font-weight:700;
  font-family:inherit;text-align:center;transition:all .15s;direction:ltr;
}
.form-row input:focus,.form-row select:focus{
  outline:none;border-color:var(--brand-blue);box-shadow:0 0 0 3px rgba(49,58,136,0.12);background:white;
}
.form-row select{direction:rtl;text-align:right;cursor:pointer}
.tou-row input.peak{border-color:var(--peak-color);color:var(--peak-color)}
.tou-row input.mid{border-color:var(--mid-color);color:#B45309}
.tou-row input.off{border-color:var(--off-color);color:#15803D}
.section-divider{margin:14px 0 10px;padding-bottom:4px;border-bottom:1.5px dashed var(--border);color:var(--brand-gray);font-size:12px;font-weight:600}
.chk{display:flex;align-items:center;gap:8px}
.chk input[type=checkbox]{width:18px;height:18px;accent-color:var(--brand-blue)}

/* ── Results ── */
.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.calc-item{background:var(--calc-bg);padding:12px;border-radius:var(--radius-sm);border-right:3px solid var(--brand-blue)}
.calc-item .label{font-size:11px;color:var(--brand-gray);margin-bottom:3px;font-weight:500}
.calc-item .value{font-size:16px;font-weight:700;color:var(--brand-blue);direction:ltr;text-align:right}
.calc-item.peak{border-right-color:var(--peak-color)}.calc-item.peak .value{color:var(--peak-color)}
.calc-item.mid{border-right-color:var(--mid-color)}.calc-item.mid .value{color:#B45309}
.calc-item.off{border-right-color:var(--off-color)}.calc-item.off .value{color:#15803D}
.calc-item.alert .value{color:var(--brand-red)}
.calc-item.ok .value{color:var(--success)}

/* ── Tables ── */
.table-wrap{overflow-x:auto;margin:0 -20px;padding:0 20px}
table{width:100%;border-collapse:collapse;font-size:12px;min-width:650px}
thead th{background:linear-gradient(180deg,#F0F4FB 0%,#DCE3F0 100%);color:var(--brand-blue);font-weight:700;padding:10px 8px;text-align:center;border-bottom:2px solid var(--brand-blue);font-size:12px}
tbody td{padding:10px 8px;text-align:center;border-bottom:1px solid var(--border);color:var(--text)}
tbody tr:nth-child(even){background:#FBFCFD}
tbody tr:hover{background:#F0F4FB}
tbody td.num{direction:ltr;font-weight:600;font-variant-numeric:tabular-nums}
tbody td.label-cell{font-weight:700;text-align:right}
tbody tr.peak td.label-cell{color:var(--peak-color)}
tbody tr.mid td.label-cell{color:#B45309}
tbody tr.off td.label-cell{color:#15803D}
tbody tr.zero{opacity:0.45}
.pile-name{font-weight:700;color:var(--brand-blue);text-align:right}
tr.over-pattern td.pile-name{color:var(--brand-red)}
tr.over-pattern{background:#FFF5F5}
.result-table{width:100%;border-collapse:collapse;font-size:13px}
.result-table th,.result-table td{padding:7px 10px;text-align:center;border-bottom:1px solid var(--border)}
.result-table th{background:var(--bg);font-weight:700;color:var(--brand-blue)}
.result-table td:first-child{text-align:right;font-weight:600}
.result-table tr:last-child td{border-bottom:none;font-weight:700;color:var(--brand-blue);font-size:15px}
.chart-data-table thead th{position:sticky;top:0;z-index:3;background:linear-gradient(180deg,#F0F4FB 0%,#DCE3F0 100%);box-shadow:0 2px 0 var(--brand-blue)}
.tou-dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-left:5px;vertical-align:middle}
.tou-dot.peak{background:var(--peak-color)}
.tou-dot.mid{background:var(--mid-color)}
.tou-dot.off{background:var(--off-color)}

/* ── Summary ── */
.summary-list{display:flex;flex-direction:column;gap:1px;background:var(--border);border-radius:var(--radius-sm);overflow:hidden}
.summary-item{display:flex;justify-content:space-between;align-items:center;padding:11px 16px;background:white;font-size:13px}
.summary-item .name{color:var(--text)}
.summary-item .name small{display:block;color:var(--text-light);font-size:11px;margin-top:1px}
.summary-item .amount{font-weight:700;color:var(--brand-blue);direction:ltr;font-variant-numeric:tabular-nums}
.summary-item.final{background:linear-gradient(135deg,var(--brand-red) 0%,var(--brand-red-dark) 100%);color:white;padding:16px;font-size:15px}
.summary-item.final .name{color:white;font-weight:700}
.summary-item.final .amount{color:white;font-size:20px}
.summary-item.toman{background:#FEF5F5;border-top:1px dashed var(--brand-red)}
.summary-item.toman .name{color:var(--brand-red-dark)}
.summary-item.toman .amount{color:var(--brand-red-dark)}
.legal-row{display:flex;gap:10px;flex-wrap:wrap;padding:8px 14px;background:#FEF3C7;border-radius:8px;margin-top:8px}
.legal-row .item{font-size:12px}
.legal-row .item strong{color:var(--brand-blue)}
.note-box{background:#EFF6FF;border-radius:8px;padding:10px 14px;font-size:12px;color:var(--text-light);margin-top:10px;line-height:1.8}

/* ── Charts ── */
.chart-wrap{height:360px;position:relative;padding:4px}
.water-chart-wrap{height:560px}
@media(max-width:640px){.chart-wrap{height:280px}}
@media(max-width:640px){.water-chart-wrap{height:420px}}
.chart-controls{display:flex;gap:16px;margin-bottom:12px;flex-wrap:wrap;align-items:center;padding:10px 14px;background:var(--calc-bg);border-radius:var(--radius-sm);font-size:12px}
.chart-controls .info{color:var(--text-light);flex:1;min-width:200px}
.chart-controls .marker{display:inline-flex;align-items:center;gap:6px}
.chart-controls .dot{width:10px;height:10px;border-radius:50%;background:var(--brand-red);display:inline-block}

/* ── Visibility ── */
.section{display:none}
.section.active{display:block}
.sub-pane{display:none}
.sub-pane.active{display:block}

/* ── Footer ── */
.footer{background:var(--brand-blue-dark);color:rgba(255,255,255,0.85);padding:28px 24px 20px;margin-top:40px;text-align:center}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-strip{height:4px;background:linear-gradient(90deg,var(--brand-red) 0%,var(--brand-red) 38%,white 38%,white 100%);margin:-28px -24px 20px}
.footer h3{color:white;font-size:15px;margin-bottom:6px}
.footer .credits{font-size:11px;opacity:0.7;margin-top:12px;line-height:1.8}
.footer .credits strong{color:white}
@media print{.chart-wrap,.footer,.main-tabs,.sub-tabs{display:none}.card{box-shadow:none;border:1px solid var(--border);break-inside:avoid}}