/* ============================================================
   HEAT SOLUTIONS v2 — дизајн систем
   Палета: мастило / челик / бакар (бакарна цевка = акцент)
   ============================================================ */
:root {
  --ink: #1B2430;        /* мастило — текст */
  --ink-2: #4A5568;
  --paper: #EFF1F0;      /* ладна подлога */
  --panel: #FFFFFF;
  --line: #D8DCDA;
  --copper: #B4622D;     /* бакарна цевка — акцент */
  --copper-2: #8E4A1F;
  --steel: #3D6B8E;
  --green: #3E7C52;
  --red: #B3382E;
  --yellow: #B07C1F;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --disp: 'Archivo', system-ui, sans-serif;
  --body: 'Inter', system-ui, sans-serif;
  --r: 10px;
  --sh: 0 1px 3px rgba(27,36,48,.08), 0 4px 16px rgba(27,36,48,.06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--paper); color: var(--ink); font: 15px/1.5 var(--body); }
h1,h2,h3 { font-family: var(--disp); letter-spacing: -.01em; }
button { font: inherit; cursor: pointer; }
input, select { font: inherit; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 7px; padding: 7px 10px; }
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--copper); outline-offset: 1px; }
input[type=number] { font-family: var(--mono); font-size: 14px; }
.muted { color: var(--ink-2); }
.mono { font-family: var(--mono); }

/* --- Header --- */
header { background: var(--ink); color: #fff; padding: 12px 22px; display: flex; align-items: center; gap: 16px; }
header .logo { font-family: var(--disp); font-weight: 800; font-size: 17px; letter-spacing: .04em; }
header .logo span { color: var(--copper); }
header .sp { flex: 1; }
header button { background: transparent; color: #E8E4DE; border: 1px solid #46536355; border-radius: 8px; padding: 7px 13px; }
header button:hover { border-color: var(--copper); color: #fff; }
.cloud { font-size: 12px; padding: 4px 10px; border-radius: 20px; background: #2A3644; color: #9FB2C4; }
.cloud.on { color: #8FD1A5; }

/* --- Wizard: цевководна лента --- */
.rail { display: flex; align-items: center; gap: 0; padding: 22px 26px 6px; max-width: 1100px; margin: 0 auto; }
.rail .stop { display: flex; align-items: center; gap: 9px; }
.rail .dot { width: 30px; height: 30px; border-radius: 50%; border: 3px solid var(--line); background: #fff; display: grid; place-items: center; font: 700 13px var(--mono); color: var(--ink-2); flex: none; }
.rail .stop.done .dot { border-color: var(--copper); background: var(--copper); color: #fff; }
.rail .stop.now .dot { border-color: var(--copper); color: var(--copper); box-shadow: 0 0 0 4px #B4622D22; }
.rail .lbl { font-size: 12.5px; font-weight: 600; color: var(--ink-2); white-space: nowrap; }
.rail .stop.now .lbl { color: var(--ink); }
.rail .pipe { flex: 1; height: 6px; background: var(--line); border-radius: 3px; margin: 0 10px; min-width: 18px; position: relative; overflow: hidden; }
.rail .pipe.full::after { content: ''; position: absolute; inset: 0; background: var(--copper); }
.rail .stop { cursor: pointer; }

main { max-width: 1100px; margin: 14px auto 90px; padding: 0 22px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--sh); padding: 22px; margin-bottom: 16px; }
.card h2 { margin: 0 0 4px; font-size: 19px; }
.card .sub { margin: 0 0 18px; color: var(--ink-2); font-size: 13.5px; }
.grid { display: grid; gap: 13px; }
.g2 { grid-template-columns: 1fr 1fr; } .g3 { grid-template-columns: repeat(3, 1fr); } .g4 { grid-template-columns: repeat(4, 1fr); }
.f label { display: block; font-size: 12px; font-weight: 600; color: var(--ink-2); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .04em; }
.f input, .f select { width: 100%; }

/* --- Систем картички --- */
.sys { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.sys button { background: #fff; border: 2px solid var(--line); border-radius: var(--r); padding: 18px 14px; text-align: left; }
.sys button.on { border-color: var(--copper); background: #B4622D0E; }
.sys b { display: block; font-family: var(--disp); font-size: 15px; margin-bottom: 4px; }
.sys small { color: var(--ink-2); }

/* --- Табела простории --- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-2); padding: 8px 8px; border-bottom: 2px solid var(--line); white-space: nowrap; }
td { padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
td input[type=text] { width: 130px; } td input[type=number] { width: 74px; }
td.num, th.num { text-align: right; font-family: var(--mono); }
tr.total td { font-weight: 700; border-top: 2px solid var(--ink); border-bottom: none; }
.chk { display: inline-flex; align-items: center; gap: 5px; font-size: 13px; }
.rowdel { background: none; border: none; color: var(--red); font-size: 16px; padding: 2px 6px; }

/* --- Копчиња --- */
.btn { background: var(--copper); color: #fff; border: none; border-radius: 8px; padding: 10px 20px; font-weight: 700; }
.btn:hover { background: var(--copper-2); }
.btn.ghost { background: #fff; color: var(--ink); border: 1.5px solid var(--line); font-weight: 600; }
.btn.ghost:hover { border-color: var(--copper); color: var(--copper); }
.btn.steel { background: var(--steel); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.nav { display: flex; justify-content: space-between; margin-top: 10px; }
.addrow { margin-top: 10px; }

/* --- Предупредувања --- */
.warn { border-radius: 8px; padding: 9px 13px; font-size: 13.5px; margin: 5px 0; display: flex; gap: 9px; align-items: baseline; }
.warn.red { background: #B3382E14; color: var(--red); border-left: 4px solid var(--red); }
.warn.yellow { background: #B07C1F14; color: #7A5510; border-left: 4px solid var(--yellow); }
.warn.green { background: #3E7C5214; color: var(--green); border-left: 4px solid var(--green); }

/* --- Понуда табови --- */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--line); margin-bottom: 16px; flex-wrap: wrap; }
.tabs button { background: none; border: none; padding: 10px 16px; font-weight: 600; color: var(--ink-2); border-bottom: 3px solid transparent; margin-bottom: -2px; }
.tabs button.on { color: var(--copper); border-bottom-color: var(--copper); }

/* --- ТРАГА (потпис на дизајнот: инженерски слип) --- */
.q { display: inline-grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; border: 1.5px solid var(--steel); color: var(--steel); font: 700 11px var(--mono); background: #fff; vertical-align: middle; margin-left: 6px; }
.q:hover { background: var(--steel); color: #fff; }
.trace { font-family: var(--mono); font-size: 12.5px; background: #1B2430; color: #C7D3DE; border-radius: 8px; padding: 12px 15px; margin: 8px 0; overflow-x: auto; }
.trace .tr-title { color: #E8B98A; font-weight: 700; margin-bottom: 6px; letter-spacing: .03em; }
.trace .tr-row { white-space: pre; line-height: 1.75; }
.trace .tr-tip { color: #7FA3C0; }
.trace .tr-src { color: #7C8896; font-style: italic; }
.trace .tr-res b { color: #8FD1A5; }
.pop { position: absolute; z-index: 40; max-width: 460px; box-shadow: 0 8px 30px rgba(0,0,0,.25); }

/* --- Секции во понуда --- */
.sekcija { font-family: var(--disp); font-weight: 800; font-size: 13px; letter-spacing: .06em; color: var(--copper-2); padding-top: 16px; }
.tot-line { display: flex; justify-content: space-between; font-family: var(--mono); padding: 4px 0; }
.tot-line.big { font-size: 19px; font-weight: 800; border-top: 2px solid var(--ink); padding-top: 9px; margin-top: 6px; }

/* --- Ценовник --- */
.toolbar { display: flex; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; align-items: center; }
.toolbar input[type=search] { flex: 1; min-width: 180px; }

/* --- Листа понуди --- */
.plist td { cursor: pointer; }
.plist tr:hover td { background: #B4622D0A; }
.badge { font-size: 11px; padding: 2px 9px; border-radius: 12px; background: var(--line); font-weight: 700; }
.badge.v { background: #3D6B8E22; color: var(--steel); }

/* --- Печатење --- */
.printdoc { display: none; }
@media print {
  body > *:not(.printdoc) { display: none !important; }
  body.print-ponuda #print-ponuda { display: block; }
  body.print-tehnicki #print-tehnicki { display: block; }
  body { background: #fff; }
  .printdoc { font-size: 12px; color: #000; padding: 8mm; }
  .printdoc table { font-size: 11px; }
  .printdoc h1 { font-size: 20px; margin: 0 0 2px; }
  .printdoc .trace { background: #f2f2f2; color: #222; page-break-inside: avoid; }
  .printdoc .trace .tr-title { color: #8E4A1F; }
  .printdoc .trace .tr-res b { color: #3E7C52; }
  .pagebreak { page-break-before: always; }
}

@media (max-width: 760px) {
  .g2,.g3,.g4 { grid-template-columns: 1fr; }
  .rail .lbl { display: none; }
  td input[type=text] { width: 100px; } td input[type=number] { width: 58px; }
}