/* ============================================================
   CIDesign Studio — Calculadora 3D
   Industrial / Maker / Dark-first
   ============================================================ */

:root {
  /* Brand */
  --cd-blue-900: #1a2742;
  --cd-blue-800: #233356;
  --cd-blue-700: #2d4170;
  --cd-blue-500: #5478b8;
  --cd-yellow: #f5b71d;
  --cd-yellow-warm: #e89422;
  --cd-yellow-soft: #fbd35a;

  /* Dark theme (default) */
  --bg: #0d1220;
  --bg-elev: #141a2c;
  --bg-elev-2: #1b223a;
  --bg-input: #0a0f1c;
  --border: #243150;
  --border-strong: #364b7a;
  --text: #e8ecf5;
  --text-dim: #8c98b3;
  --text-muted: #5a6584;
  --accent: var(--cd-yellow);
  --accent-hover: var(--cd-yellow-soft);
  --accent-ink: #1a1200;
  --danger: #ef4d4d;
  --success: #2dd4a0;
  --grid-line: rgba(255, 255, 255, 0.025);

  --radius: 6px;
  --radius-lg: 10px;
  --pad: 16px;
  --pad-tight: 10px;
  --gap: 14px;

  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, sans-serif;

  --shadow-1: 0 1px 0 rgba(255,255,255,.03) inset, 0 1px 2px rgba(0,0,0,.4);
  --shadow-2: 0 8px 32px rgba(0,0,0,.5);
}

[data-theme="light"] {
  --bg: #f3f1ec;
  --bg-elev: #ffffff;
  --bg-elev-2: #f9f7f1;
  --bg-input: #ffffff;
  --border: #d9d4c8;
  --border-strong: #b0a896;
  --text: #1a1f2e;
  --text-dim: #5b6478;
  --text-muted: #8a8f9d;
  --accent: var(--cd-blue-700);
  --accent-hover: var(--cd-blue-800);
  --accent-ink: #ffffff;
  --grid-line: rgba(0, 0, 0, 0.04);
}

[data-theme="contrast"] {
  --bg: #000000;
  --bg-elev: #0a0a0a;
  --bg-elev-2: #141414;
  --bg-input: #000;
  --border: #ffffff;
  --border-strong: #ffffff;
  --text: #ffffff;
  --text-dim: #cccccc;
  --text-muted: #888888;
  --accent: #ffe600;
  --accent-hover: #ffff66;
  --accent-ink: #000000;
}

/* Density */
[data-density="compact"] {
  --pad: 12px;
  --pad-tight: 8px;
  --gap: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
}

.mono { font-family: var(--mono); font-feature-settings: "tnum" 1, "zero" 1; }
.tabular { font-variant-numeric: tabular-nums; }

/* ---------- App shell ---------- */
.app {
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  box-shadow: var(--shadow-1);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand img { width: 36px; height: 36px; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand-name { font-family: var(--mono); font-weight: 700; font-size: 14px; letter-spacing: 0.02em; color: var(--text); }
.brand-app { font-family: var(--mono); font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; }

.topbar-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev-2);
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  font-weight: 600;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-ink); }
.btn-ghost { background: transparent; border-color: var(--border); }
.btn-icon { padding: 8px; min-width: 34px; justify-content: center; }
.btn-danger:hover { border-color: var(--danger); color: var(--danger); }

/* ---------- Layout: two columns ---------- */
.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(360px, 1fr);
  gap: 20px;
  align-items: start;
}
@media (max-width: 1024px) {
  .workspace { grid-template-columns: 1fr; }
}

/* ---------- Wizard / steps ---------- */
.stepper {
  display: flex;
  gap: 4px;
  padding: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow-x: auto;
}
.step {
  flex: 1;
  min-width: 120px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  border-radius: var(--radius);
  text-align: left;
  white-space: nowrap;
  transition: all 0.15s;
}
.step:hover { color: var(--text); background: var(--bg-elev-2); }
.step.active {
  background: var(--bg-elev-2);
  color: var(--accent);
  box-shadow: inset 0 -2px 0 var(--accent);
}
.step .step-num {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
}
.step.active .step-num { border-color: var(--accent); color: var(--accent); }
.step.done .step-num {
  background: var(--success);
  border-color: var(--success);
  color: #000;
}
.step.done { color: var(--text); }

/* ---------- Panel / card ---------- */
.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px var(--pad);
  border-bottom: 1px solid var(--border);
}
.panel-header h2 {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-weight: 600;
}
.panel-header .panel-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  margin-right: 8px;
}
.panel-body { padding: var(--pad); }

/* ---------- Grid for fields ---------- */
.fgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}
.fgrid .full { grid-column: 1 / -1; }
@media (max-width: 600px) {
  .fgrid { grid-template-columns: 1fr; }
}

/* ---------- Field ---------- */
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}
.field label .req { color: var(--accent); }
.field .help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-size: 9px;
  cursor: help;
  position: relative;
}
.field .help:hover { color: var(--accent); border-color: var(--accent); }
.field .help[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elev-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 6px 8px;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 11px;
  text-transform: none;
  letter-spacing: 0;
  width: 200px;
  z-index: 100;
  pointer-events: none;
  box-shadow: var(--shadow-2);
}

.input, .select, .textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 12px;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}
.input[readonly] { background: var(--bg-elev-2); color: var(--text-dim); }
.textarea { font-family: var(--sans); resize: vertical; min-height: 60px; }

.input-suffix {
  position: relative;
}
.input-suffix .input { padding-right: 42px; }
.input-suffix .suffix {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
  text-transform: uppercase;
}
.input-prefix .input { padding-left: 36px; }
.input-prefix .prefix {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
}

/* time row */
.time-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

/* ---------- Material chips ---------- */
.material-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 8px;
}
.material-chip {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 8px;
  cursor: pointer;
  text-align: left;
  font-family: var(--mono);
  transition: all 0.15s;
  position: relative;
}
.material-chip:hover { border-color: var(--border-strong); }
.material-chip.active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-elev-2));
}
.material-chip .name { font-weight: 700; font-size: 12px; color: var(--text); display: block; }
.material-chip .meta { font-size: 10px; color: var(--text-dim); margin-top: 2px; display: block; }
.material-chip .swatch {
  position: absolute;
  top: 8px; right: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- Toggle ---------- */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 12px;
}
.toggle-row .toggle-label { color: var(--text); display: flex; flex-direction: column; gap: 2px; }
.toggle-row .toggle-label small { color: var(--text-dim); font-size: 10px; }

.switch {
  position: relative;
  width: 36px; height: 20px;
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
}
.switch::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: all 0.2s;
}
.switch.on { background: var(--accent); border-color: var(--accent); }
.switch.on::after { left: 18px; background: var(--accent-ink); }

/* segmented */
.seg {
  display: inline-flex;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px;
  gap: 2px;
}
.seg button {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  letter-spacing: 0.05em;
}
.seg button.active { background: var(--accent); color: var(--accent-ink); }

/* ---------- Step nav buttons ---------- */
.step-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

/* ---------- Receipt (right column) ---------- */
.receipt {
  position: sticky;
  top: 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}
.receipt-header {
  padding: 14px 16px;
  background: var(--bg-elev-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.receipt-header h3 {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
}
.receipt-header .meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-dim);
}
.receipt-body { padding: 16px; }

.receipt-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12px;
}
.receipt-table th {
  text-align: left;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
  padding: 0 0 8px;
  border-bottom: 1px solid var(--border);
}
.receipt-table th.num { text-align: right; }
.receipt-table td {
  padding: 7px 0;
  border-bottom: 1px dashed var(--border);
  vertical-align: top;
}
.receipt-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.receipt-table td.dim { color: var(--text-dim); font-size: 11px; }
.receipt-table tr.subtotal td {
  border-top: 2px solid var(--border-strong);
  border-bottom: none;
  padding-top: 10px;
  font-weight: 700;
  color: var(--text);
}
.receipt-table tr.profit td { color: var(--success); }

.receipt-final {
  background: var(--bg-elev-2);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-top: 14px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.receipt-final .label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}
.receipt-final .value {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.receipt-secondary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}
.receipt-secondary .cell {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
}
.receipt-secondary .cell .l {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 4px;
}
.receipt-secondary .cell .v {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.receipt-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
}
.receipt-actions .btn { justify-content: center; }

/* Cost bar (visual proportion) */
.cost-bar {
  display: flex;
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
  background: var(--bg-input);
  margin: 6px 0 12px;
}
.cost-bar span { height: 100%; transition: width 0.3s; }
.cost-bar .seg-fil { background: var(--accent); }
.cost-bar .seg-eng { background: var(--cd-blue-500); }
.cost-bar .seg-wer { background: var(--cd-yellow-warm); }
.cost-bar .seg-lab { background: var(--success); }
.cost-bar .seg-pak { background: var(--text-muted); }
.cost-bar .seg-fal { background: var(--danger); }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.legend .dot { width: 8px; height: 8px; border-radius: 2px; display: inline-block; margin-right: 5px; vertical-align: middle; }

/* History list */
.history-modal-bg {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.history-modal {
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 560px;
  max-height: 80vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.history-modal-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.history-modal-body { padding: 8px; overflow-y: auto; }
.history-item {
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  gap: 10px;
}
.history-item:hover { background: var(--bg-elev-2); border-color: var(--border); }
.history-item .h-main { display: flex; flex-direction: column; min-width: 0; }
.history-item .h-title { font-weight: 600; color: var(--text); font-size: 13px; }
.history-item .h-sub { font-family: var(--mono); font-size: 11px; color: var(--text-dim); }
.history-item .h-price { font-family: var(--mono); font-weight: 700; color: var(--accent); font-size: 14px; }
.history-empty { padding: 30px; text-align: center; color: var(--text-dim); font-size: 13px; }

/* Toast */
.toast {
  position: fixed;
  bottom: 20px; left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elev-2);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 12px;
  z-index: 200;
  box-shadow: var(--shadow-2);
  animation: toast-in 0.3s ease;
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* Hidden helper */
.hidden { display: none !important; }

/* Mode tag */
.mode-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.mode-tag::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Advanced collapse */
.adv-section {
  margin-top: 14px;
  border-top: 1px dashed var(--border);
  padding-top: 14px;
}
.adv-toggle {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.adv-toggle:hover { color: var(--accent); }
.adv-toggle .caret { transition: transform 0.2s; }
.adv-toggle.open .caret { transform: rotate(90deg); }

/* Reverse calc highlight */
.reverse-card {
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-elev-2));
  border: 1px dashed var(--accent);
  border-radius: var(--radius);
  padding: 12px;
  margin-top: 10px;
}
.reverse-card h4 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.08em;
}
.reverse-card .reverse-result {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}
.reverse-card .reverse-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
}

/* Print */
@media print {
  body { background: white; color: black; }
  .topbar, .stepper, .step-nav, .receipt-actions, .topbar-actions, .panel:not(.print-only) { display: none !important; }
  .receipt { position: static; box-shadow: none; border: 1px solid #000; }
}