/* ============================================
   Calculadora de Marcos — Stylesheet
   Estetica: taller fino / cotizacion artesanal
   ============================================ */

/* -- Reset -- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Palette */
  --bg:           #f7f3ee;
  --surface:      #ffffff;
  --border:       #e0d6ca;
  --text:         #3a2f24;
  --text-muted:   #8a7d6f;
  --accent:       #8b6914;
  --accent-hover: #a37c1a;
  --primary:      #5c4a2a;
  --primary-hover:#4a3a1f;
  --danger:       #c0392b;
  --success:      #27ae60;
  --warning:      #e67e22;
  --info-bg:      #fdf6e3;
  --alert-bg:     #fdecea;

  /* Spacing / Shape */
  --radius:    10px;
  --radius-sm: 6px;
  --shadow:    0 2px 8px rgba(58,47,36,0.08);
  --shadow-lg: 0 4px 20px rgba(58,47,36,0.12);
  --font:      'Segoe UI', system-ui, -apple-system, sans-serif;
  --ease:      0.2s ease;

  /* Wood-grain CSS fallbacks */
  --tex-pino:
    repeating-linear-gradient(92deg,
      transparent 0px, transparent 3px,
      rgba(160,115,50,0.12) 3px, rgba(160,115,50,0.12) 4px),
    repeating-linear-gradient(88deg,
      transparent 0px, transparent 7px,
      rgba(140,100,40,0.08) 7px, rgba(140,100,40,0.08) 8px),
    linear-gradient(135deg, #d4a65a 0%, #c89a48 25%, #ddb86e 50%, #c89a48 75%, #b8843c 100%);

  --tex-banak:
    repeating-linear-gradient(91deg,
      transparent 0px, transparent 4px,
      rgba(130,85,40,0.10) 4px, rgba(130,85,40,0.10) 5px),
    repeating-linear-gradient(87deg,
      transparent 0px, transparent 9px,
      rgba(120,75,35,0.07) 9px, rgba(120,75,35,0.07) 10px),
    linear-gradient(135deg, #c89a6e 0%, #b88550 30%, #d4a878 50%, #b88550 70%, #a87040 100%);

  --tex-encino:
    repeating-linear-gradient(93deg,
      transparent 0px, transparent 2px,
      rgba(90,60,30,0.14) 2px, rgba(90,60,30,0.14) 3px),
    repeating-linear-gradient(86deg,
      transparent 0px, transparent 6px,
      rgba(80,50,25,0.09) 6px, rgba(80,50,25,0.09) 7px),
    linear-gradient(135deg, #a67c52 0%, #8b6340 30%, #b88e62 50%, #8b6340 70%, #7a5635 100%);

  --tex-nogal:
    repeating-linear-gradient(91deg,
      transparent 0px, transparent 3px,
      rgba(50,28,12,0.16) 3px, rgba(50,28,12,0.16) 4px),
    repeating-linear-gradient(88deg,
      transparent 0px, transparent 8px,
      rgba(40,22,10,0.10) 8px, rgba(40,22,10,0.10) 9px),
    linear-gradient(135deg, #6b4226 0%, #5a3520 30%, #7d5033 50%, #5a3520 70%, #4d2d1a 100%);

  --tex-tzalam:
    repeating-linear-gradient(92deg,
      transparent 0px, transparent 3px,
      rgba(70,40,20,0.13) 3px, rgba(70,40,20,0.13) 4px),
    repeating-linear-gradient(87deg,
      transparent 0px, transparent 7px,
      rgba(60,35,18,0.08) 7px, rgba(60,35,18,0.08) 8px),
    linear-gradient(135deg, #8b5e3c 0%, #7a4f30 30%, #9c6e4a 50%, #7a4f30 70%, #6b4226 100%);

  --tex-ebano:
    repeating-linear-gradient(93deg,
      transparent 0px, transparent 2px,
      rgba(0,0,0,0.18) 2px, rgba(0,0,0,0.18) 3px),
    repeating-linear-gradient(86deg,
      transparent 0px, transparent 5px,
      rgba(0,0,0,0.12) 5px, rgba(0,0,0,0.12) 6px),
    linear-gradient(135deg, #2c1810 0%, #1e100a 30%, #3a2418 50%, #1e100a 70%, #150c07 100%);

  --tex-personalizada:
    repeating-linear-gradient(90deg,
      transparent 0px, transparent 4px,
      rgba(0,0,0,0.06) 4px, rgba(0,0,0,0.06) 5px),
    linear-gradient(135deg, #bbb 0%, #a5a5a5 50%, #bbb 100%);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* -- Header -- */
.app-header {
  background: var(--primary);
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-header h1 { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; }
.app-header .subtitle { font-size: 0.82rem; opacity: 0.75; margin-top: 1px; }
.header-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* -- Layout -- */
.app-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 20px;
  max-width: 1600px;
  margin: 0 auto;
}
.col-config, .col-preview {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* -- Card -- */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  scroll-margin-top: 90px;
}
.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  user-select: none;
}
.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
}
.card-hint {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

/* -- Collapsible -- */
.collapsible .card-title {
  cursor: pointer;
  position: relative;
}
.collapse-toggle {
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--ease);
  flex-shrink: 0;
  position: relative;
}
.collapse-toggle::before {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(45deg);
  transition: transform 0.25s ease;
  margin-top: -3px;
}
.collapse-toggle:hover {
  background: rgba(92,74,42,0.08);
}
.collapsible .card-body {
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease, padding 0.25s ease;
  max-height: 2000px;
  opacity: 1;
}
.collapsible.collapsed .card-body {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin-top: 0;
}
.collapsible.collapsed .card-title {
  margin-bottom: 0;
}
.collapsible.collapsed .collapse-toggle::before {
  transform: rotate(-45deg);
  margin-top: 3px;
}

/* -- Forms -- */
.form-grid { display: grid; gap: 12px; }
.form-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.form-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field > span { font-size: 0.8rem; font-weight: 500; color: var(--text-muted); }
.field input, .field select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  transition: border-color var(--ease);
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139,105,20,0.12);
}
.field.full-width { grid-column: 1 / -1; }
.checkbox-field {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
}
.checkbox-field input[type="checkbox"] {
  width: 18px; height: 18px;
  accent-color: var(--accent);
}

/* -- Buttons -- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--ease);
  white-space: nowrap;
  user-select: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-accent  { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
/* Header variants */
.app-header .btn-outline { color: #fff; border-color: rgba(255,255,255,0.4); }
.app-header .btn-outline:hover { background: rgba(255,255,255,0.15); color: #fff; }
.app-header .btn-primary { background: var(--accent); }
.app-header .btn-primary:hover { background: var(--accent-hover); }
.btn-sm  { padding: 5px 10px; font-size: 0.78rem; }
.btn-lg  { padding: 12px 24px; font-size: 1rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.select-sm {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-family: var(--font);
  background: #fff;
  color: var(--text);
}

/* -- Info & Alert -- */
.info-box {
  background: var(--info-bg);
  border: 1px solid #e6d9a8;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-top: 12px;
  font-size: 0.82rem;
  line-height: 1.7;
}
.info-box strong { color: var(--primary); }
.alert-box {
  background: var(--alert-bg);
  border: 1px solid #f5c6cb;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--danger);
  font-weight: 500;
  line-height: 1.6;
}
.alert-box p { margin-bottom: 4px; }
.alert-box p:last-child { margin-bottom: 0; }
.hidden { display: none !important; }

/* -- Madera selector -- */
.madera-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(115px, 1fr));
  gap: 8px;
}
.madera-card {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  text-align: center;
  cursor: pointer;
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
}
.madera-card > * { position: relative; z-index: 1; }
.madera-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(139,105,20,0.25);
}
.madera-card:hover { border-color: var(--accent); }

/* Mini frame swatch - 4-piece representation */
.mini-frame {
  position: relative;
  width: 56px;
  height: 42px;
  margin: 0 auto 6px;
}
.mini-frame-piece {
  position: absolute;
  background-size: cover !important;
  background-position: center !important;
  border: 1px solid rgba(0,0,0,0.1);
}
/* Top strip */
.mini-frame-piece:nth-child(1) {
  top: 0; left: 0; right: 0; height: 8px;
  border-radius: 2px 2px 0 0;
}
/* Bottom strip */
.mini-frame-piece:nth-child(2) {
  bottom: 0; left: 0; right: 0; height: 8px;
  border-radius: 0 0 2px 2px;
}
/* Left strip */
.mini-frame-piece:nth-child(3) {
  top: 8px; left: 0; width: 8px; bottom: 8px;
}
/* Right strip */
.mini-frame-piece:nth-child(4) {
  top: 8px; right: 0; width: 8px; bottom: 8px;
}
/* Inner void */
.mini-frame-inner {
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  background: #fff;
  box-shadow: inset 0 0 2px rgba(0,0,0,0.1);
}

.madera-card .madera-name { font-size: 0.78rem; font-weight: 600; }
.madera-card .madera-price { font-size: 0.7rem; color: var(--text-muted); }
.madera-detail-row { margin-top: 12px; }
.madera-desc {
  font-size: 0.76rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 8px;
}

/* -- Acabado selector -- */
.acabado-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(125px, 1fr));
  gap: 8px;
}
.acabado-card {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 8px;
  text-align: center;
  cursor: pointer;
  transition: all var(--ease);
  font-size: 0.82rem;
}
.acabado-card.selected {
  border-color: var(--accent);
  background: var(--info-bg);
}
.acabado-card:hover { border-color: var(--accent); }
.acabado-card .acabado-name { font-weight: 600; }
.acabado-card .acabado-cost { font-size: 0.7rem; color: var(--text-muted); margin-top: 2px; }

/* -- Checklist -- */
.checklist {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 420px;
  overflow-y: auto;
  scrollbar-width: thin;
}
.checklist-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--ease);
}
.checklist-item:hover { background: #faf7f2; }
.checklist-item input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--accent);
  flex-shrink: 0;
}
.checklist-item .item-name { flex: 1; font-size: 0.82rem; }
.checklist-item .item-price {
  width: 76px;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.8rem;
  text-align: right;
  font-family: var(--font);
  color: var(--text);
}
.checklist-item .item-unit {
  font-size: 0.7rem;
  color: var(--text-muted);
  min-width: 58px;
}
.checklist-item select.item-unit-select {
  padding: 3px 4px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.72rem;
  background: #fff;
  font-family: var(--font);
  color: var(--text);
}

/* ======================================
   Preview (NO sticky - normal flow)
   ====================================== */
.preview-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 24px;
  /* Subtle workshop wall */
  background:
    radial-gradient(ellipse at 30% 40%, rgba(215,200,180,0.3) 0%, transparent 70%),
    repeating-conic-gradient(#f0ebe4 0% 25%, #ebe5dc 0% 50%) 0 0 / 18px 18px;
  border-radius: var(--radius-sm);
  min-height: 320px;
  position: relative;
}

/* Frame — outer container for 4-strip construction */
.frame-outer {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 1px;
  box-shadow:
    6px 6px 20px rgba(0,0,0,0.30),
    2px 2px 6px rgba(0,0,0,0.15);
  transition: all 0.3s ease;
  max-width: 92%;
  max-height: 420px;
}

/* 4-strip frame pieces */
.frame-strip {
  position: absolute;
  z-index: 2;
  background-size: cover !important;
  background-position: center !important;
}
.frame-strip-top {
  top: 0; left: 0; right: 0;
  background: linear-gradient(to bottom, rgba(255,255,255,0.18) 0%, transparent 40%, rgba(0,0,0,0.06) 100%);
}
.frame-strip-bottom {
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(255,255,255,0.06) 0%, transparent 40%, rgba(0,0,0,0.14) 100%);
}
.frame-strip-left {
  top: 0; bottom: 0; left: 0;
  background: linear-gradient(to right, rgba(255,255,255,0.12) 0%, transparent 40%, rgba(0,0,0,0.08) 100%);
}
.frame-strip-right {
  top: 0; bottom: 0; right: 0;
  background: linear-gradient(to left, rgba(255,255,255,0.06) 0%, transparent 40%, rgba(0,0,0,0.12) 100%);
}
/* Mitre joins: diagonal cuts via clip-path on top/bottom strips */
.frame-strip-top {
  clip-path: polygon(0 0, 100% 0, calc(100% - var(--strip-w, 30px)) 100%, var(--strip-w, 30px) 100%);
}
.frame-strip-bottom {
  clip-path: polygon(var(--strip-w, 30px) 0, calc(100% - var(--strip-w, 30px)) 0, 100% 100%, 0 100%);
}
.frame-strip-left {
  clip-path: polygon(0 0, 100% var(--strip-w, 30px), 100% calc(100% - var(--strip-w, 30px)), 0 100%);
}
.frame-strip-right {
  clip-path: polygon(0 var(--strip-w, 30px), 100% 0, 100% 100%, 0 calc(100% - var(--strip-w, 30px)));
}

/* Inner (image area) */
.frame-inner {
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  z-index: 3;
  box-shadow: inset 0 0 6px rgba(0,0,0,0.12);
}
.frame-inner img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  transition: transform 0.15s ease;
  user-select: none;
  -webkit-user-drag: none;
}
.frame-inner img[src=""] { display: none; }
.frame-inner img.dragging { cursor: grabbing; }

.placeholder-text {
  color: var(--text-muted);
  text-align: center;
  padding: 24px 16px;
  font-size: 0.88rem;
}
.placeholder-text .small { font-size: 0.72rem; margin-top: 4px; opacity: 0.7; }

.preview-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.zoom-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}
.zoom-controls span {
  font-size: 0.78rem;
  min-width: 42px;
  text-align: center;
  color: var(--text-muted);
}
.upload-btn { cursor: pointer; }
.preview-info {
  text-align: center;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.5;
}

/* Finish CSS filters for the frame */
.finish-natural     { }
.finish-sellado     { filter: saturate(0.8) brightness(1.05); }
.finish-barniz-mate { filter: saturate(1.1) brightness(1.02); }
.finish-barniz-satinado {
  filter: saturate(1.1);
  box-shadow:
    6px 6px 20px rgba(0,0,0,0.30),
    inset 0 0 10px rgba(255,255,255,0.18);
}
.finish-barniz-brillante {
  filter: saturate(1.2) contrast(1.05);
  box-shadow:
    6px 6px 20px rgba(0,0,0,0.35),
    inset 0 0 16px rgba(255,255,255,0.30);
}
.finish-entintado { filter: saturate(1.5) brightness(0.82); }
.finish-laqueado {
  filter: saturate(0.35) brightness(1.12);
  box-shadow:
    6px 6px 20px rgba(0,0,0,0.35),
    inset 0 0 20px rgba(255,255,255,0.40);
}
.finish-personalizado { }

/* ======================================
   Desglose
   ====================================== */
.desglose-content { font-size: 0.85rem; }
.desglose-content .muted { color: var(--text-muted); font-style: italic; }
.desglose-table { width: 100%; border-collapse: collapse; }
.desglose-table th,
.desglose-table td {
  padding: 6px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}
.desglose-table th {
  background: #faf7f2;
  font-weight: 600;
  color: var(--primary);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.desglose-table td:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.desglose-table .row-total {
  font-weight: 700;
  background: var(--info-bg);
}
.desglose-table .row-grand-total {
  font-weight: 700;
  font-size: 1.05rem;
  background: var(--primary);
  color: #fff;
}
.desglose-table .row-grand-total td { border: none; padding: 10px 8px; }
.desglose-section-header td {
  font-weight: 600;
  background: #f5f0e8;
  color: var(--primary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding-top: 10px;
}
.desglose-detail {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.desglose-detail h4 {
  font-size: 0.82rem;
  color: var(--primary);
  margin-bottom: 6px;
}
.desglose-detail p {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 3px;
}

/* -- Actions -- */
.actions-card { text-align: center; }
.actions-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.actions-row.secondary { margin-top: 10px; }

/* ======================================
   PDF Export Sheet (temporary visible div)
   ====================================== */
.pdf-export-sheet {
  position: fixed;
  top: 0;
  left: 0;
  width: 780px;
  z-index: 99999;
  font-family: 'Segoe UI', Arial, sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.5;
  padding: 0;
}
.pdf-export-sheet .pdf-header {
  text-align: center;
  padding: 18px 20px 14px;
  border-bottom: 3px solid #5c4a2a;
  margin-bottom: 10px;
}
.pdf-export-sheet .pdf-header h1 { font-size: 20px; color: #5c4a2a; margin-bottom: 2px; }
.pdf-export-sheet .pdf-header p  { font-size: 10px; color: #888; margin-top: 2px; }
.pdf-export-sheet .pdf-two-col {
  display: flex;
  gap: 20px;
  margin: 0 20px 8px;
}
.pdf-export-sheet .pdf-two-col > div { flex: 1; }
.pdf-export-sheet .pdf-section { margin: 6px 20px; }
.pdf-export-sheet .pdf-section h3 {
  font-size: 11px; color: #5c4a2a;
  border-bottom: 1px solid #ddd;
  padding-bottom: 3px; margin-bottom: 4px;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.pdf-export-sheet .pdf-section p { font-size: 10px; margin-bottom: 1px; }
.pdf-export-sheet .pdf-preview-img {
  text-align: center;
  margin: 6px 20px;
}
.pdf-export-sheet .pdf-preview-img img {
  max-width: 200px;
  max-height: 160px;
  border: 1px solid #ddd;
  border-radius: 4px;
}
.pdf-export-sheet table {
  width: 100%; border-collapse: collapse; font-size: 10px;
}
.pdf-export-sheet table th {
  background: #f5f0e8;
  padding: 4px 8px; text-align: left;
  font-weight: 600; border-bottom: 2px solid #ddd;
}
.pdf-export-sheet table td {
  padding: 3px 8px; border-bottom: 1px solid #eee;
}
.pdf-export-sheet table td:last-child { text-align: right; }
.pdf-export-sheet .pdf-total-row td {
  font-weight: 700; background: #5c4a2a; color: #fff;
  padding: 6px 8px; border: none; font-size: 12px;
}
.pdf-export-sheet .pdf-total {
  text-align: right; font-size: 16px; font-weight: 700;
  color: #5c4a2a; padding: 10px 20px;
  border-top: 3px solid #5c4a2a; margin-top: 6px;
}
.pdf-export-sheet .pdf-payment {
  margin: 4px 20px;
  font-size: 10px;
}
.pdf-export-sheet .pdf-payment p { margin-bottom: 1px; }
.pdf-export-sheet .pdf-notes {
  margin: 8px 20px; padding: 8px;
  background: #fdf6e3; border-radius: 4px;
  font-size: 9px; color: #666; line-height: 1.5;
}
.pdf-export-sheet .pdf-footer {
  text-align: center; padding: 8px;
  font-size: 8px; color: #aaa;
  border-top: 1px solid #eee; margin-top: 8px;
}

/* -- Toast notification -- */
.toast {
  position: fixed; top: 20px; right: 20px;
  background: var(--primary); color: #fff;
  padding: 12px 20px; border-radius: 8px;
  font-size: 0.85rem; z-index: 9999;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  transition: opacity 0.4s;
  pointer-events: none;
}
.toast.fade-out { opacity: 0; }

/* ======================================
   Responsive
   ====================================== */
@media (max-width: 1100px) {
  .app-main { grid-template-columns: 1fr; }
  .form-grid.cols-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .app-header {
    flex-direction: column; text-align: center; padding: 12px;
  }
  .header-actions { justify-content: center; }
  .app-main { padding: 10px; gap: 12px; }
  .form-grid.cols-2,
  .form-grid.cols-3 { grid-template-columns: 1fr; }
  .madera-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  .acabado-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
  .card { padding: 14px; }
  .preview-container { min-height: 200px; padding: 14px; }
  .btn-lg { padding: 10px 18px; font-size: 0.9rem; }
}
@media (max-width: 480px) {
  .madera-grid { grid-template-columns: 1fr 1fr; }
  .acabado-grid { grid-template-columns: 1fr 1fr; }
}