:root {
  --bg: #0d0f11;
  --bg2: #15181c;
  --bg3: #20242a;
  --surface: #171a1f;
  --border: #2c3138;
  --border2: #40464f;
  --accent: #f5a623;
  --accent2: #d98c0c;
  --green: #2dca73;
  --red: #e85555;
  --blue: #4d9fff;
  --text: #edf0f3;
  --text2: #a9b1bd;
  --text3: #6f7784;
  --shadow: 0 14px 40px rgba(0,0,0,.28);
  --mono: "DM Mono", monospace;
  --sans: "DM Sans", sans-serif;
  --display: "Syne", sans-serif;
}

.theme-light {
  --bg: #f4f6f8;
  --bg2: #ffffff;
  --bg3: #eef1f4;
  --surface: #ffffff;
  --border: #d7dce2;
  --border2: #b6bec8;
  --accent: #c97900;
  --accent2: #a86500;
  --green: #168750;
  --red: #c73939;
  --blue: #236fc4;
  --text: #151922;
  --text2: #46505d;
  --text3: #7a8390;
  --shadow: 0 14px 36px rgba(20,28,38,.12);
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.45;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .38;
}

button, input, select { font: inherit; }
button { cursor: pointer; }

.app-wrapper { max-width: 1440px; margin: 0 auto; padding: 0 20px 56px; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  margin-bottom: 18px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 240px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: #101010;
  font: 800 13px var(--display);
  border-radius: 7px;
}
.brand h1 { margin: 0; font: 800 21px/1 var(--display); letter-spacing: 0; }
.brand h1 span { color: var(--accent); }
.brand p { margin: 4px 0 0; color: var(--text3); font-size: 11px; text-transform: uppercase; letter-spacing: 1.4px; }
.header-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }

.grid-main { display: grid; grid-template-columns: minmax(340px, 400px) minmax(0, 1fr); gap: 18px; align-items: start; }
.left-col { display: grid; gap: 14px; }
.right-col { min-width: 0; }

.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
}
.panel-header h2 { margin: 0; font: 700 12px var(--display); text-transform: uppercase; letter-spacing: 1.2px; color: var(--text2); }
.panel-body { padding: 16px; }

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--accent);
  color: #111;
  font: 500 10px var(--mono);
  text-transform: uppercase;
}
.badge.muted { background: var(--surface); color: var(--text3); border: 1px solid var(--border); }

.section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--accent);
  font: 500 10px var(--mono);
  letter-spacing: 1.8px;
  text-transform: uppercase;
}
.section-label::after { content: ""; height: 1px; background: var(--border); flex: 1; }

.form-group { margin-bottom: 12px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--text3);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .7px;
  text-transform: uppercase;
}
.form-row, .customer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
input, select {
  width: 100%;
  min-height: 38px;
  padding: 8px 11px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: 6px;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.input-unit { position: relative; }
.input-unit input { padding-right: 44px; }
.unit { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); color: var(--text3); font: 500 10px var(--mono); pointer-events: none; }

.btn, .icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 9px 14px;
  border-radius: 6px;
  border: 1px solid transparent;
  font: 700 12px var(--display);
  text-transform: uppercase;
  letter-spacing: .45px;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.btn:hover, .icon-btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #111; }
.btn-primary:hover { background: var(--accent2); }
.btn-secondary { background: var(--bg3); color: var(--text); border-color: var(--border2); }
.btn-ghost { background: transparent; color: var(--text2); border-color: var(--border); }
.btn-danger { background: color-mix(in srgb, var(--red) 10%, transparent); color: var(--red); border-color: color-mix(in srgb, var(--red) 35%, var(--border)); }
.btn-sm { min-height: 32px; padding: 6px 10px; font-size: 10px; }
.btn-full { width: 100%; }
.icon-btn { width: 38px; padding: 0; background: var(--bg3); color: var(--text); border-color: var(--border2); }
.button-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.preset-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; margin-bottom: 14px; }
.preset-chip {
  min-height: 56px;
  padding: 8px 6px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text2);
  text-align: center;
}
.preset-chip .preset-icon { display: block; margin-bottom: 2px; color: var(--accent); font-size: 15px; line-height: 1; }
.preset-chip strong { display: block; color: var(--text); font-size: 11px; }
.preset-chip .preset-meta { color: var(--text3); font-size: 10px; }
.preset-chip.active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--bg3)); }

.piece-row {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  align-items: end;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg3) 52%, transparent);
}
.pieces-body { display: grid; gap: 6px; }
.piece-field { display: grid; gap: 5px; min-width: 0; }
.piece-field span { color: var(--text3); font-size: 10px; font-weight: 700; letter-spacing: .7px; text-transform: uppercase; }
.piece-row input, .piece-row select { min-height: 34px; padding: 6px 7px; font-size: 12px; }
.piece-w, .piece-h, .piece-qty { grid-column: span 2; }
.piece-shape { grid-column: span 3; }
.piece-label { grid-column: span 2; }
.remove-piece { grid-column: span 1; min-height: 34px; border-radius: 6px; border: 1px solid color-mix(in srgb, var(--red) 35%, var(--border)); background: color-mix(in srgb, var(--red) 10%, transparent); color: var(--red); font-size: 10px; font-weight: 700; text-transform: uppercase; }

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  margin-bottom: 12px;
}
.segment {
  min-height: 38px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--text3);
  font-weight: 700;
}
.segment.active { background: var(--bg3); color: var(--blue); box-shadow: inset 0 0 0 1px var(--border2); }
.check-price-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 130px;
  gap: 10px;
  align-items: center;
  margin-top: 12px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}
.checkbox-line { display: flex; align-items: center; gap: 9px; color: var(--text2); font-size: 12px; font-weight: 700; }
.checkbox-line input { width: 18px; min-height: 18px; accent-color: var(--accent); }
.compact-price input { min-height: 34px; font-size: 12px; }

.tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
  padding: 5px;
  margin-bottom: 14px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.tab {
  min-height: 38px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--text3);
  font: 700 12px var(--display);
}
.tab.active { background: var(--bg3); color: var(--text); }
.hidden { display: none !important; }

.layout-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.layout-card {
  position: relative;
  padding: 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg3);
}
.layout-card.selected { border-color: var(--green); background: color-mix(in srgb, var(--green) 8%, var(--bg3)); }
.layout-card.best { border-color: var(--accent); }
.layout-card h3 { margin: 0 0 8px; font: 700 14px var(--display); }
.layout-card p { margin: 0 0 10px; color: var(--text3); font-size: 11px; }
.best-tag { position: absolute; top: -1px; right: 10px; padding: 2px 7px; border-radius: 0 0 4px 4px; background: var(--accent); color: #111; font: 700 9px var(--mono); }
.layout-stat { display: flex; justify-content: space-between; gap: 12px; margin-top: 5px; color: var(--text2); font-size: 12px; }
.layout-stat strong { color: var(--text); font-family: var(--mono); font-weight: 500; }
.waste-bar { height: 5px; margin-top: 10px; background: var(--bg); border-radius: 4px; overflow: hidden; }
.waste-fill { height: 100%; background: var(--green); }

.alert {
  padding: 10px 12px;
  margin-bottom: 12px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--red) 12%, var(--bg3));
  border: 1px solid color-mix(in srgb, var(--red) 42%, var(--border));
  color: var(--text);
  font-size: 12px;
}
.empty-state {
  min-height: 180px;
  display: grid;
  place-items: center;
  color: var(--text3);
  text-align: center;
  font-size: 13px;
}

#layoutCanvas {
  display: block;
  width: 100%;
  min-height: 280px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.legend { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-top: 12px; color: var(--text2); font-size: 11px; }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

.cost-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.cost-item { min-width: 0; padding: 12px; background: var(--bg3); border: 1px solid var(--border); border-radius: 7px; }
.cost-icon { display: grid; place-items: center; width: 28px; height: 28px; margin-bottom: 8px; border-radius: 6px; background: color-mix(in srgb, var(--accent) 16%, var(--bg)); color: var(--accent); font: 700 11px var(--mono); }
.cost-item span { display: block; color: var(--text3); font-size: 10px; text-transform: uppercase; letter-spacing: .8px; }
.cost-item strong { display: block; margin-top: 4px; color: var(--text); font: 500 18px var(--mono); overflow-wrap: anywhere; }
.cost-item.highlight { border-color: var(--accent); }
.cost-item.green { border-color: var(--green); }
.cost-item.unit-card { border-color: var(--blue); }
.quote-panel { margin-top: 16px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.quote-top { display: flex; justify-content: space-between; gap: 16px; padding: 14px 16px; background: var(--accent); color: #111; }
.quote-top h3 { margin: 0; font: 800 17px var(--display); }
.quote-top p { margin: 4px 0 0; font: 500 11px var(--mono); }
.quote-table { width: 100%; border-collapse: collapse; }
.quote-table th, .quote-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; }
.quote-table th { color: var(--text3); font-size: 10px; text-transform: uppercase; letter-spacing: .8px; }
.quote-table td:last-child, .quote-table th:last-child { text-align: right; font-family: var(--mono); }
.quote-total { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; background: var(--bg3); }
.quote-total strong { color: var(--accent); font: 500 28px var(--mono); }
.saved-job { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; padding: 8px; margin-bottom: 8px; background: var(--bg3); border: 1px solid var(--border); border-radius: 7px; text-align: left; }
.saved-job-main { flex: 1; min-height: 38px; padding: 4px 6px; background: transparent; border: 0; color: inherit; text-align: left; }
.saved-job strong { display: block; color: var(--text); }
.saved-job span { color: var(--text3); font: 500 11px var(--mono); }
.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  max-width: min(420px, calc(100vw - 32px));
  padding: 12px 15px;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-left: 4px solid var(--green);
  border-radius: 7px;
  box-shadow: var(--shadow);
  transform: translateX(125%);
  transition: transform .22s ease;
}
.toast.show { transform: translateX(0); }
.toast.error { border-left-color: var(--red); }

@media (max-width: 1100px) {
  .grid-main { grid-template-columns: 1fr; }
  .topbar { align-items: flex-start; flex-direction: column; }
  .header-actions { justify-content: flex-start; }
}
@media (max-width: 720px) {
  .app-wrapper { padding-inline: 12px; }
  .form-row, .customer-grid, .layout-cards, .cost-grid { grid-template-columns: 1fr; }
  .preset-grid { grid-template-columns: repeat(2, 1fr); }
  .tabs { grid-template-columns: repeat(2, 1fr); }
  .piece-row { grid-template-columns: 1fr 1fr; }
  .piece-w, .piece-h, .piece-qty, .piece-shape, .piece-label, .remove-piece { grid-column: span 1; }
  .check-price-row { grid-template-columns: 1fr; }
}

@media print {
  body { background: #fff; color: #111; }
  body::before, .topbar, .left-col, .tabs, #tab-optimizer, #tab-visual, #tab-costs, #tab-jobs { display: none !important; }
  .grid-main { display: block; }
  .panel { border: 0; box-shadow: none; }
  .quote-panel { break-inside: avoid; }
}