:root {
  --red: #d71920;
  --red-dark: #99070c;
  --black: #0c0c0f;
  --dark: #19191d;
  --dark2: #24242b;
  --text: #f6f7f9;
  --muted: #a6adbb;
  --line: #373741;
  --card: #151519;
  --white: #ffffff;
  --green: #21c45d;
  --amber: #f59e0b;
  --danger: #ef4444;
  --shadow: 0 18px 55px rgba(0,0,0,.35);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: radial-gradient(circle at 20% 0%, #3a0c0e 0%, #111114 25%, #070709 100%); color: var(--text); font-family: Inter, Arial, Helvetica, sans-serif; }
a { color: var(--text); text-decoration: none; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 18px 28px; border-bottom: 1px solid rgba(255,255,255,.08); background: rgba(10,10,12,.9); position: sticky; top: 0; z-index: 20; backdrop-filter: blur(14px); }
.brand { display: flex; align-items: center; gap: 18px; }
.brand img { width: 160px; max-width: 38vw; height: auto; filter: drop-shadow(0 0 18px rgba(215,25,32,.25)); }
.brand h1 { margin: 0; font-size: clamp(18px, 2vw, 28px); letter-spacing: .2px; }
.brand p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.top-actions { display: flex; gap: 14px; align-items: center; font-size: 13px; }
.badge { padding: 7px 10px; border: 1px solid rgba(215,25,32,.5); border-radius: 999px; color: #ffd4d7; background: rgba(215,25,32,.12); }
.tabs { display: flex; gap: 8px; padding: 12px 28px; background: rgba(13,13,16,.74); overflow-x: auto; border-bottom: 1px solid rgba(255,255,255,.07); position: sticky; top: 93px; z-index: 15; backdrop-filter: blur(14px); }
.tab { color: var(--muted); background: transparent; border: 1px solid transparent; padding: 10px 14px; border-radius: 10px; cursor: pointer; white-space: nowrap; font-weight: 700; }
.tab.active, .tab:hover { color: var(--white); border-color: rgba(215,25,32,.5); background: rgba(215,25,32,.15); }
main { padding: 24px 28px 34px; max-width: 1500px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }
.grid { display: grid; gap: 18px; margin-bottom: 18px; }
.hero-grid { grid-template-columns: repeat(4, minmax(0,1fr)); }
.two-col { grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
.span-2 { grid-column: span 2; }
.card, .kpi-card, .hmi { background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)); border: 1px solid rgba(255,255,255,.09); border-radius: 18px; padding: 18px; box-shadow: var(--shadow); }
.card h2 { margin: 0 0 14px; font-size: 18px; }
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
select, input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: #0e0e11; color: var(--text); outline: none; }
select:focus, input:focus, textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(215,25,32,.15); }
.kpi-card { display: flex; flex-direction: column; justify-content: center; min-height: 130px; }
.kpi-card span, .result-grid span, .hmi-grid span { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }
.kpi-card strong { font-size: clamp(22px, 3vw, 34px); margin-top: 8px; }
.option-summary h3 { margin: 0 0 10px; font-size: 28px; }
.option-summary p { color: var(--muted); line-height: 1.55; }
.option-summary .tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.tag { padding: 6px 10px; border-radius: 999px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.08); font-size: 12px; color: #fff; }
.clean-list { margin: 0; padding-left: 20px; color: #d9dde6; line-height: 1.75; }
.numbered { list-style-position: inside; padding-left: 0; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.form-grid label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.result-grid, .hmi-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
.result-grid div, .hmi-grid div { background: rgba(0,0,0,.25); border: 1px solid rgba(255,255,255,.08); padding: 14px; border-radius: 14px; }
.result-grid strong, .hmi-grid strong { display: block; margin-top: 6px; font-size: 21px; }
.note { padding: 12px; background: rgba(245,158,11,.12); border: 1px solid rgba(245,158,11,.28); border-radius: 12px; color: #ffe1a6; line-height: 1.55; }
.data-table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: 12px; }
.data-table th { background: var(--red); color: #fff; padding: 10px; text-align: left; font-size: 12px; }
.data-table td { padding: 10px; border-bottom: 1px solid rgba(255,255,255,.08); color: #dfe3ec; vertical-align: top; }
.data-table input { padding: 7px 9px; min-width: 75px; }
.btn { background: linear-gradient(135deg, var(--red), var(--red-dark)); color: #fff; border: 0; padding: 10px 14px; border-radius: 10px; font-weight: 800; cursor: pointer; box-shadow: 0 10px 26px rgba(215,25,32,.25); }
.btn.ghost { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); box-shadow: none; }
.btn.danger { background: linear-gradient(135deg, #ef4444, #991b1b); }
.sim-toolbar { display: flex; gap: 10px; margin-bottom: 12px; }
.flow-canvas { background: #09090b; border: 1px solid rgba(255,255,255,.08); border-radius: 16px; overflow: hidden; }
.flow-canvas svg { width: 100%; display: block; }
.station-box { fill: #1e1e25; stroke: #4b4b58; stroke-width: 2; }
.station-active { fill: rgba(215,25,32,.4); stroke: #d71920; }
.station-label { fill: #f6f7f9; font-size: 13px; font-weight: 700; text-anchor: middle; }
.station-time { fill: #a6adbb; font-size: 11px; text-anchor: middle; }
.util-bars, .bar-chart { display: grid; gap: 10px; }
.util-row, .compare-row { display: grid; grid-template-columns: 150px 1fr 110px; gap: 12px; align-items: center; font-size: 13px; color: #dfe3ec; }
.track { height: 14px; background: rgba(255,255,255,.08); border-radius: 999px; overflow: hidden; }
.fill { height: 100%; background: linear-gradient(90deg, #7f1116, #d71920); border-radius: 999px; }
.hmi { margin-bottom: 18px; }
.hmi-status { display: flex; gap: 16px; align-items: center; }
.hmi-status h2 { margin: 0; }
.hmi-status p { margin: 4px 0 0; color: var(--muted); }
.hmi-light { width: 36px; height: 36px; border-radius: 50%; display: inline-block; box-shadow: 0 0 20px currentColor; }
.hmi-light.running { background: var(--green); color: var(--green); }
.hmi-light.stopped { background: var(--danger); color: var(--danger); }
.hmi-buttons { display: flex; gap: 12px; margin: 18px 0; }
.option-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.option-card { background: #0d0d10; border: 1px solid rgba(255,255,255,.08); border-radius: 16px; padding: 16px; cursor: pointer; transition: .15s ease; }
.option-card:hover, .option-card.selected { transform: translateY(-2px); border-color: var(--red); box-shadow: 0 12px 35px rgba(215,25,32,.18); }
.option-card h3 { margin: 0 0 6px; }
.option-card strong { display: block; color: #fff; font-size: 22px; margin: 10px 0; }
.option-card p { color: var(--muted); line-height: 1.45; }
.report-box { width: 100%; min-height: 500px; background: #09090b; color: #e5e7eb; border: 1px solid var(--line); border-radius: 14px; padding: 18px; font-family: Consolas, Monaco, monospace; line-height: 1.55; }
footer { display: flex; justify-content: space-between; gap: 18px; padding: 22px 28px; color: var(--muted); font-size: 12px; border-top: 1px solid rgba(255,255,255,.08); background: #08080a; }
@media (max-width: 980px) {
  .hero-grid, .two-col, .option-cards { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .result-grid, .hmi-grid, .form-grid { grid-template-columns: 1fr; }
  .topbar, footer { flex-direction: column; align-items: flex-start; }
  .tabs { top: 145px; }
}