/* Refrigerant Line Sizer — dark, glassy, gradient-accent theme */

:root {
  --bg0: #070b12;
  --bg1: #0c1220;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-solid: #101827;
  --stroke: rgba(255, 255, 255, 0.09);
  --stroke-strong: rgba(255, 255, 255, 0.16);
  --text: #e8eef7;
  --text-dim: #94a3b8;
  --text-faint: #64748b;
  --accent: #38bdf8;
  --accent2: #818cf8;
  --accent-grad: linear-gradient(135deg, #38bdf8, #818cf8);
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --radius: 14px;
  --mono: "Cascadia Code", "SF Mono", Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(56, 189, 248, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(129, 140, 248, 0.08), transparent 55%),
    linear-gradient(180deg, var(--bg1), var(--bg0) 40%);
  color: var(--text);
  font: 15px/1.5 -apple-system, "Segoe UI", system-ui, Roboto, sans-serif;
  min-height: 100vh;
}

.wrap { max-width: 1280px; margin: 0 auto; padding: 28px 22px 80px; }

/* ---------- header ---------- */
header { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }
header h1 {
  margin: 0; font-size: 26px; font-weight: 800; letter-spacing: -0.02em;
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
header .sub { color: var(--text-dim); font-size: 14px; }
header .actions { margin-left: auto; display: flex; gap: 10px; }

button.ghost {
  background: var(--panel); color: var(--text); border: 1px solid var(--stroke);
  border-radius: 10px; padding: 8px 16px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
button.ghost:hover { border-color: var(--accent); background: rgba(56, 189, 248, 0.08); }

/* ---------- layout ---------- */
.layout { display: grid; grid-template-columns: 430px 1fr; gap: 22px; align-items: start; }
@media (max-width: 980px) { .layout { grid-template-columns: 1fr; } }

/* ---------- cards ---------- */
.card {
  background: var(--panel);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  backdrop-filter: blur(6px);
}
.card h2 {
  margin: 0 0 14px; font-size: 12px; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-dim);
  display: flex; align-items: center; gap: 8px;
}
.card h2::before { content: ""; width: 18px; height: 3px; border-radius: 2px; background: var(--accent-grad); }

/* ---------- form controls ---------- */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 12px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px 12px; }
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field.span2 { grid-column: span 2; }
.field label { font-size: 12px; color: var(--text-dim); font-weight: 600; }
.field .hint { font-size: 11px; color: var(--text-faint); }

input[type="number"], select, input[type="text"] {
  width: 100%; background: rgba(0, 0, 0, 0.35); color: var(--text);
  border: 1px solid var(--stroke); border-radius: 9px;
  padding: 9px 11px; font-size: 14px; font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}
input[type="number"]::-webkit-inner-spin-button { opacity: 0.4; }

.inline { display: flex; gap: 8px; align-items: center; }
.inline > * { flex: 1; }
.inline > .narrow { flex: 0 0 96px; }

/* segmented control */
.seg { display: flex; background: rgba(0, 0, 0, 0.35); border: 1px solid var(--stroke); border-radius: 9px; padding: 3px; gap: 3px; }
.seg button {
  flex: 1; border: 0; background: transparent; color: var(--text-dim);
  padding: 7px 10px; border-radius: 7px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.seg button.active { background: var(--accent-grad); color: #06121f; }

/* toggle rows */
.toggle-row { display: flex; align-items: center; gap: 10px; padding: 4px 0; }
.toggle-row label { font-size: 13px; font-weight: 600; color: var(--text); cursor: pointer; }
.toggle-row .hint { margin-left: auto; }

.switch { position: relative; width: 40px; height: 22px; flex: none; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; z-index: 1; }
.switch .track {
  position: absolute; inset: 0; border-radius: 999px;
  background: rgba(255, 255, 255, 0.12); transition: background 0.18s;
}
.switch .track::after {
  content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%;
  background: #cbd5e1; transition: transform 0.18s, background 0.18s;
}
.switch input:checked + .track { background: var(--accent-grad); }
.switch input:checked + .track::after { transform: translateX(18px); background: #06121f; }

.subsection { border-top: 1px dashed var(--stroke); margin-top: 12px; padding-top: 12px; }
.subsection h3 { margin: 0 0 10px; font-size: 13px; font-weight: 700; color: var(--text); }
.subsection h3 .tag { font-size: 11px; color: var(--text-faint); font-weight: 500; margin-left: 6px; }

/* evaporator rows */
.evap-row {
  display: grid; grid-template-columns: 1.2fr 1fr 0.8fr 0.6fr 0.7fr 28px; gap: 8px;
  align-items: end; margin-bottom: 8px;
}
.evap-row .field label { font-size: 10px; }
.evap-row button.del {
  background: none; border: 0; color: var(--text-faint); font-size: 17px; cursor: pointer; padding: 8px 2px;
}
.evap-row button.del:hover { color: var(--bad); }
button.add {
  background: none; border: 1px dashed var(--stroke-strong); color: var(--text-dim);
  border-radius: 9px; padding: 8px 14px; font-size: 13px; cursor: pointer; width: 100%;
}
button.add:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- results ---------- */
.badges { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.badge-card {
  background: var(--panel); border: 1px solid var(--stroke); border-radius: var(--radius);
  padding: 16px; text-align: center; position: relative; overflow: hidden;
}
.badge-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent-grad);
}
.badge-card .line-name { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 6px; }
.badge-card .size {
  font-family: var(--mono); font-size: 34px; font-weight: 700; line-height: 1.1;
  background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.badge-card .size small { font-size: 15px; }
.badge-card .meta { font-size: 11px; color: var(--text-faint); margin-top: 6px; }

.line-detail { border-top: 1px solid var(--stroke); padding: 12px 0; }
.line-detail:first-of-type { border-top: 0; }
.line-detail .head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.line-detail .head .name { font-weight: 700; font-size: 14px; }
.line-detail .head .sz { font-family: var(--mono); font-weight: 700; color: var(--accent); margin-left: auto; font-size: 16px; white-space: nowrap; }
.stats { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 6px; font-size: 12px; color: var(--text-dim); }
.stats b { color: var(--text); font-weight: 600; font-family: var(--mono); }
.line-note { font-size: 12px; color: var(--text-faint); margin-top: 4px; }
.riser-flag { color: var(--warn); font-size: 12px; margin-top: 4px; font-weight: 600; }

/* warnings */
.warnings { border-color: rgba(251, 191, 36, 0.35); background: rgba(251, 191, 36, 0.05); }
.warnings h2::before { background: var(--warn); }
.warnings ul { margin: 0; padding-left: 20px; }
.warnings li { font-size: 13px; color: #fcd34d; margin-bottom: 6px; }
.allclear { color: var(--good); font-size: 13px; font-weight: 600; }

/* schematic */
#schematic svg { width: 100%; height: auto; display: block; }
.sch-label { font: 600 11px var(--mono); fill: var(--text-dim); }
.sch-size { font: 700 13px var(--mono); fill: #38bdf8; }
.sch-box { fill: rgba(255,255,255,0.05); stroke: rgba(255,255,255,0.25); stroke-width: 1.2; rx: 8; }
.sch-title { font: 700 10px -apple-system, "Segoe UI", sans-serif; fill: #94a3b8; letter-spacing: 0.08em; }

/* material table */
table.materials { width: 100%; border-collapse: collapse; font-size: 13px; }
table.materials th {
  text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-faint); padding: 6px 10px; border-bottom: 1px solid var(--stroke-strong);
}
table.materials td { padding: 8px 10px; border-bottom: 1px solid var(--stroke); vertical-align: top; }
table.materials td.qty { font-family: var(--mono); font-weight: 700; color: var(--accent); white-space: nowrap; text-align: right; }
table.materials tr:last-child td { border-bottom: 0; }
.support-mix { display: flex; flex-direction: column; gap: 6px; }
.support-mix span { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); }
.support-mix input { width: 64px; flex: 0 0 auto; }
.field-wide { grid-column: 1 / -1; }

table.materials tr.mat-cat td {
  padding: 12px 10px 5px; font-size: 11px; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); border-bottom: 1px solid var(--stroke-strong);
}

.charge-note { font-size: 13px; color: var(--text-dim); margin-top: 10px; }
.charge-note b { color: var(--text); font-family: var(--mono); }

.footnote { font-size: 11px; color: var(--text-faint); line-height: 1.6; }
.footnote a { color: var(--accent); text-decoration: none; }

.empty-state { color: var(--text-faint); font-size: 14px; padding: 30px; text-align: center; }

/* ---------- print ---------- */
@media print {
  :root { color-scheme: light; }
  html, body { background: #fff; color: #111; }
  .wrap { max-width: none; padding: 0; }
  header .actions, #inputs-col { display: none !important; }
  .layout { grid-template-columns: 1fr; }
  .card { background: #fff; border-color: #ccc; break-inside: avoid; }
  .card h2, .field label { color: #555; }
  .badge-card .size, header h1 { -webkit-text-fill-color: initial; color: #0369a1; background: none; }
  .stats, .stats b, .line-detail .head .name { color: #111; }
  .line-detail .head .sz { color: #0369a1; }
  table.materials td.qty { color: #0369a1; }
  .warnings li { color: #92400e; }
  .footnote, .charge-note { color: #555; }
  #print-summary { display: block !important; font-size: 13px; color: #111; margin-bottom: 14px; }
}
#print-summary { display: none; }