/* =====================================================
   GAUDÍ MOSAIC — Estils principals
   "L'originalitat consisteix a tornar a l'origen."
   ===================================================== */

/* --- Variables de disseny --- */
:root {
  --gaudi-gold: #D4A843;
  --gaudi-blue: #2E6B8A;
  --gaudi-teal: #1A8A7D;
  --gaudi-orange: #D4763A;
  --gaudi-cream: #F5ECD7;
  --gaudi-dark: #1C1914;
  --gaudi-ceramic: #E8DCC8;
  --gaudi-green: #4A7C59;
  --gaudi-red: #B84233;
  --gaudi-white: #FAF6EE;
  --shadow-soft: 0 4px 20px rgba(28,25,20,0.15);
  --shadow-deep: 0 8px 40px rgba(28,25,20,0.25);
  --border-subtle: 1px solid rgba(212,168,67,0.15);
  --border-faint: 1px solid rgba(212,168,67,0.08);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--gaudi-dark);
  color: var(--gaudi-cream);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  -webkit-font-smoothing: antialiased;
}

/* --- Patró de fons --- */
.bg-pattern {
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.06;
  background-image:
    radial-gradient(ellipse at 20% 50%, var(--gaudi-gold) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, var(--gaudi-blue) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, var(--gaudi-teal) 0%, transparent 50%);
  pointer-events: none;
}

/* --- App principal --- */
.app {
  display: none;
  height: 100vh;
  width: 100vw;
  position: relative;
  z-index: 1;
}
.app.active {
  display: flex;
  flex-direction: column;
}

/* --- Capçalera --- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: rgba(28,25,20,0.95);
  border-bottom: var(--border-subtle);
  backdrop-filter: blur(10px);
  z-index: 100;
  flex-shrink: 0;
}

.header-brand {
  font-family: 'Playfair Display', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--gaudi-cream);
  cursor: pointer;
  user-select: none;
}
.header-brand span { color: var(--gaudi-gold); }

.header-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

.header-btn {
  padding: 6px 12px;
  background: rgba(212,168,67,0.08);
  border: 1px solid rgba(212,168,67,0.15);
  color: var(--gaudi-gold);
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  border-radius: 3px;
  white-space: nowrap;
}
.header-btn:hover {
  background: rgba(212,168,67,0.18);
  border-color: rgba(212,168,67,0.3);
}
.header-btn.primary {
  background: var(--gaudi-gold);
  color: var(--gaudi-dark);
  border-color: var(--gaudi-gold);
  font-weight: 600;
}
.header-btn.primary:hover {
  background: #c49930;
}
.header-btn.edu {
  background: rgba(26,138,125,0.15);
  border-color: rgba(26,138,125,0.3);
  color: #24ADA0;
}
.header-btn.edu:hover {
  background: rgba(26,138,125,0.25);
}
.header-btn.help {
  background: rgba(212,168,67,0.1);
  border-color: rgba(212,168,67,0.2);
  font-size: 13px;
  padding: 4px 8px;
}
.header-btn.help:hover {
  background: rgba(212,168,67,0.2);
}

.header-sep {
  width: 1px;
  height: 20px;
  background: rgba(212,168,67,0.1);
  margin: 0 4px;
}

/* --- Selector d'idioma --- */
.lang-selector {
  display: flex;
  gap: 2px;
  align-items: center;
}
.lang-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 16px;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
  transition: all 0.2s;
  opacity: 0.5;
}
.lang-btn:hover {
  opacity: 0.8;
  border-color: rgba(212,168,67,0.2);
}
.lang-btn.active {
  opacity: 1;
  border-color: rgba(212,168,67,0.4);
  background: rgba(212,168,67,0.08);
}

/* --- Espai de treball --- */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* --- Panell lateral --- */
.panel {
  width: 260px;
  background: rgba(28,25,20,0.97);
  border-right: var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  transition: transform var(--transition-smooth);
}

.panel-tabs {
  display: flex;
  border-bottom: var(--border-faint);
}
.panel-tab {
  flex: 1;
  padding: 10px 8px;
  background: none;
  border: none;
  color: rgba(245,236,215,0.55);
  font-family: 'DM Sans', sans-serif;
  font-size: 11px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 2px solid transparent;
}
.panel-tab:hover {
  color: rgba(245,236,215,0.8);
}
.panel-tab.active {
  color: var(--gaudi-gold);
  border-bottom-color: var(--gaudi-gold);
}

.panel-content {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}
.panel-content.active {
  display: flex;
}

.panel-header {
  padding: 12px 14px;
  border-bottom: var(--border-faint);
}
.panel-title {
  font-family: 'Playfair Display', serif;
  font-size: 13px;
  color: var(--gaudi-gold);
  margin-bottom: 2px;
}
.panel-subtitle {
  font-size: 10px;
  color: rgba(245,236,215,0.55);
}

/* Controls de ceràmica */
.ceramic-controls {
  padding: 10px 14px;
  border-bottom: var(--border-faint);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.control-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.control-label {
  font-size: 10px;
  color: rgba(245,236,215,0.55);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-width: 55px;
}
.control-select {
  flex: 1;
  padding: 4px 6px;
  background: rgba(212,168,67,0.06);
  border: 1px solid rgba(212,168,67,0.12);
  color: var(--gaudi-cream);
  font-family: 'DM Sans', sans-serif;
  font-size: 11px;
  border-radius: 2px;
  cursor: pointer;
}
.control-select option {
  background: var(--gaudi-dark);
  color: var(--gaudi-cream);
}
.control-range {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(212,168,67,0.15);
  border-radius: 2px;
  outline: none;
}
.control-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gaudi-gold);
  cursor: pointer;
}
.control-value {
  font-size: 10px;
  color: var(--gaudi-gold);
  min-width: 40px;
  text-align: right;
}

/* Graella de ceràmiques */
.ceramics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 10px;
  overflow-y: auto;
  flex: 1;
}
.ceramic-tile {
  aspect-ratio: 1;
  border-radius: 3px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  border: 2px solid transparent;
  transition: all 0.25s ease;
}
.ceramic-tile:hover {
  border-color: var(--gaudi-gold);
  transform: scale(1.04);
}
.ceramic-tile:focus {
  outline: 2px solid var(--gaudi-gold);
  outline-offset: 2px;
}
.ceramic-tile.selected {
  border-color: var(--gaudi-gold);
  box-shadow: 0 0 12px rgba(212,168,67,0.4);
}
.ceramic-tile canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.ceramic-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 3px 5px;
  background: rgba(28,25,20,0.8);
  font-size: 9px;
  color: var(--gaudi-cream);
  text-align: center;
}

/* --- Panell de capes --- */
.layers-section {
  padding: 10px;
  flex: 1;
  overflow-y: auto;
}
.layer-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 3px;
  cursor: pointer;
  transition: background var(--transition-smooth);
  margin-bottom: 4px;
}
.layer-item:hover {
  background: rgba(212,168,67,0.06);
}
.layer-item.active {
  background: rgba(212,168,67,0.12);
  border-left: 3px solid var(--gaudi-gold);
}
.layer-vis {
  background: none;
  border: none;
  color: rgba(245,236,215,0.5);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
  transition: color var(--transition-smooth);
}
.layer-vis:hover { color: var(--gaudi-cream); }
.layer-vis.visible { color: var(--gaudi-gold); }
.layer-name {
  flex: 1;
  font-size: 12px;
  color: var(--gaudi-cream);
}
.layer-count {
  font-size: 10px;
  color: var(--gaudi-gold);
  background: rgba(212,168,67,0.15);
  padding: 2px 8px;
  border-radius: 8px;
  font-weight: 500;
}
.layer-del {
  background: none;
  border: none;
  color: #D4645A;
  cursor: pointer;
  font-size: 12px;
  padding: 2px 4px;
  transition: color var(--transition-smooth);
}
.layer-del:hover { color: var(--gaudi-red); }

.add-layer-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 8px;
  margin-top: 6px;
  background: rgba(212,168,67,0.06);
  border: 1px dashed rgba(212,168,67,0.15);
  color: rgba(212,168,67,0.75);
  font-family: 'DM Sans', sans-serif;
  font-size: 11px;
  cursor: pointer;
  border-radius: 3px;
  transition: all var(--transition-smooth);
}
.add-layer-btn:hover {
  background: rgba(212,168,67,0.1);
  color: var(--gaudi-gold);
}

/* --- Panell de plantilles --- */
.templates-section {
  padding: 10px;
  flex: 1;
  overflow-y: auto;
}
.template-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 3px;
  cursor: pointer;
  transition: background var(--transition-smooth);
  margin-bottom: 4px;
}
.template-item:hover {
  background: rgba(212,168,67,0.06);
}
.template-item.active {
  background: rgba(212,168,67,0.12);
  border-left: 3px solid var(--gaudi-gold);
}
.template-info {
  flex: 1;
}
.template-name {
  font-size: 12px;
  color: var(--gaudi-cream);
  margin-bottom: 2px;
}
.template-desc {
  font-size: 10px;
  color: rgba(245,236,215,0.55);
}
.template-opacity-wrap {
  padding: 10px 14px;
  border-top: var(--border-faint);
}

/* --- Àrea del llenç --- */
.canvas-area {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at center, rgba(245,236,215,0.03) 0%, transparent 70%);
}
#mosaicCanvas {
  display: block;
  width: 100%;
  height: 100%;
}
.canvas-hint {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  transition: opacity 0.5s ease;
}
.canvas-hint.hidden { opacity: 0; }
.canvas-hint-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border: 2px dashed rgba(212,168,67,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(212,168,67,0.55);
  font-size: 24px;
}
.canvas-hint p {
  font-size: 14px;
  color: rgba(245,236,215,0.55);
  line-height: 1.6;
}
.canvas-hint p strong {
  color: rgba(212,168,67,0.75);
  font-weight: 500;
}

/* --- Safata de fragments --- */
.fragments-tray {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  padding: 10px 16px;
  background: rgba(28,25,20,0.95);
  border: var(--border-subtle);
  border-radius: 6px;
  backdrop-filter: blur(10px);
  max-width: 80vw;
  overflow-x: auto;
  z-index: 50;
  transition: opacity 0.3s, transform 0.3s;
}
.fragments-tray.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(10px);
  pointer-events: none;
}
.tray-label {
  font-size: 10px;
  color: rgba(212,168,67,0.75);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 2px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  margin-right: 4px;
}
.fragment-thumb {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  cursor: grab;
  border: 1px solid rgba(212,168,67,0.2);
  border-radius: 3px;
  transition: all 0.2s;
  background: rgba(28,25,20,0.5);
}
.fragment-thumb:hover {
  border-color: var(--gaudi-gold);
  transform: scale(1.1);
}
.fragment-thumb canvas {
  width: 100%;
  height: 100%;
}

/* --- Barra d'eines inferior --- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 16px;
  background: rgba(28,25,20,0.97);
  border-top: var(--border-subtle);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.tool-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(212,168,67,0.06);
  border: 1px solid rgba(212,168,67,0.12);
  color: var(--gaudi-cream);
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 3px;
  font-size: 15px;
  position: relative;
}
.tool-btn:hover {
  background: rgba(212,168,67,0.15);
  border-color: rgba(212,168,67,0.3);
}
.tool-btn:focus {
  outline: 2px solid var(--gaudi-gold);
  outline-offset: 2px;
}
.tool-btn.active {
  background: rgba(212,168,67,0.2);
  border-color: var(--gaudi-gold);
  color: var(--gaudi-gold);
}
.tool-sep {
  width: 1px;
  height: 24px;
  background: rgba(212,168,67,0.1);
  margin: 0 4px;
}
.tool-label {
  font-size: 9px;
  color: rgba(245,236,215,0.55);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin: 0 6px;
}

/* Botons de fons */
.bg-btn {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(212,168,67,0.2);
  cursor: pointer;
  transition: all 0.2s;
}
.bg-btn:hover { border-color: rgba(212,168,67,0.5); }
.bg-btn.active { border-color: var(--gaudi-gold); box-shadow: 0 0 8px rgba(212,168,67,0.3); }

/* Controls del rejunt */
.grout-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: rgba(245,236,215,0.55);
}
.grout-toggle {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 16px;
  background: rgba(212,168,67,0.15);
  border-radius: 8px;
  position: relative;
  cursor: pointer;
  transition: background var(--transition-smooth);
}
.grout-toggle:checked {
  background: var(--gaudi-gold);
}
.grout-toggle::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  background: var(--gaudi-cream);
  border-radius: 50%;
  transition: transform var(--transition-smooth);
}
.grout-toggle:checked::before {
  transform: translateX(12px);
}
.grout-color {
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  background: none;
  padding: 0;
}
.grout-width {
  width: 50px;
}

/* --- Notificacions --- */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 20px;
  background: rgba(28,25,20,0.95);
  border: 1px solid var(--gaudi-gold);
  color: var(--gaudi-cream);
  font-size: 13px;
  z-index: 500;
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 3px;
  max-width: 300px;
  backdrop-filter: blur(10px);
}
.notification.show { transform: translateX(0); }

/* --- Pista de peça seleccionada --- */
.piece-info {
  position: absolute;
  bottom: 70px;
  right: 20px;
  padding: 8px 14px;
  background: rgba(28,25,20,0.95);
  border: var(--border-subtle);
  border-radius: 4px;
  font-size: 10px;
  color: rgba(245,236,215,0.5);
  z-index: 50;
  display: none;
}
.piece-info.visible { display: block; }
.piece-info strong { color: var(--gaudi-gold); font-weight: 600; }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(212,168,67,0.2); border-radius: 2px; }

/* --- Navegació mòbil (es mostra via media query a modals.css) --- */
.mobile-nav { display: none; }

/* --- Zoom info --- */
.zoom-info {
  position: absolute;
  bottom: 10px;
  right: 10px;
  font-size: 10px;
  color: rgba(212,168,67,0.75);
  pointer-events: none;
  z-index: 40;
}