/* =============================================
   PALETA — Generador de Colores
   Estética: editorial oscura con acentos vivos
   ============================================= */

:root {
  --bg:       #0e0e10;
  --surface:  #17171b;
  --border:   #2a2a32;
  --border-2: #3a3a45;
  --text:     #e8e8f0;
  --muted:    #7a7a90;
  --accent:   #c8f564;
  --accent-2: #f564c8;
  --radius:   12px;
  --radius-lg:20px;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --transition:   0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow:   0 8px 40px rgba(0,0,0,0.5);
  --shadow-sm:0 2px 12px rgba(0,0,0,0.35);
}

/* MODO CLARO */
body.light {
  --bg:       #f5f4f0;
  --surface:  #ffffff;
  --border:   #dddbd4;
  --border-2: #c8c5bc;
  --text:     #1a1a1e;
  --muted:    #888680;
  --accent:   #5a7a00;      /* verde oscuro en lugar de fluorescente */
  --accent-2: #b0006a;      /* rosa oscuro */
  --shadow:   0 8px 40px rgba(0,0,0,0.12);
  --shadow-sm:0 2px 12px rgba(0,0,0,0.08);
}

/* Utilidad: ocultar elementos */
.hidden { display: none; }

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  min-height: 100vh;
  overflow-x: hidden;
}

/* FOCUS VISIBLE */
:focus-visible {
  outline: 2.5px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =============================================
   TOAST
   ============================================= */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(140%);
  background: var(--text);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  padding: 0.6rem 1.2rem;
  border-radius: 100px;
  z-index: 1000;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.35s ease;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* =============================================
   HEADER
   ============================================= */
.site-header {
  padding: 2.5rem 2rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.logo {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  line-height: 1;
}

.logo-dot {
  display: inline-block;
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 3s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.35); opacity: 0.7; }
}

.tagline {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  flex: 1;
}

/* Theme toggle */
.btn-theme {
  background: transparent;
  border: none;
  border-radius: 100px;
  width: 2.375rem;
  height: 2.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  transition: transform var(--transition), opacity var(--transition);
  flex-shrink: 0;
  opacity: 0.75;
}

.btn-theme:hover {
  transform: rotate(20deg) scale(1.2);
  opacity: 1;
}

/* =============================================
   MAIN
   ============================================= */
.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
}

/* =============================================
   CONTROLS
   ============================================= */
.controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.control-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

/* Segmented control */
.segmented {
  display: flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
}

.seg-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.75rem;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.seg-btn:hover:not(.active) {
  background: var(--border);
  color: var(--text);
}

.seg-btn.active {
  background: var(--accent);
  color: var(--bg);
  font-weight: 500;
}

/* Generate button — base desktop, overridden for mobile below */
.btn-generate {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.6rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 100px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn-icon {
  font-size: 1rem;
  display: inline-block;
  transition: transform 0.5s ease;
}

.btn-generate:hover .btn-icon {
  transform: rotate(180deg);
}

/* =============================================
   PALETTE GRID
   ============================================= */
.palette-section {
  margin-bottom: 3.5rem;
}

.palette-grid {
  display: grid;
  gap: 1rem;
}

/* COLOR CARD */
.color-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  animation: card-in 0.4s cubic-bezier(0.34, 1.3, 0.64, 1) both;
  display: flex;
  flex-direction: column;
}

.color-card:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: var(--shadow);
  border-color: var(--border-2);
}

.color-card.locked {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 2px var(--accent-2);
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(20px) scale(0.92); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

/* Stagger cards */
.color-card:nth-child(1)  { animation-delay: 0.03s; }
.color-card:nth-child(2)  { animation-delay: 0.07s; }
.color-card:nth-child(3)  { animation-delay: 0.11s; }
.color-card:nth-child(4)  { animation-delay: 0.15s; }
.color-card:nth-child(5)  { animation-delay: 0.19s; }
.color-card:nth-child(6)  { animation-delay: 0.23s; }
.color-card:nth-child(7)  { animation-delay: 0.27s; }
.color-card:nth-child(8)  { animation-delay: 0.31s; }
.color-card:nth-child(9)  { animation-delay: 0.35s; }

/* Color swatch */
.card-swatch {
  width: 100%;
  aspect-ratio: 1 / 1.1;
  position: relative;
  transition: filter var(--transition);
  cursor: pointer;
}

.card-swatch::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(0,0,0,0.3) 100%);
  opacity: 0;
  transition: opacity var(--transition);
}

.color-card:hover .card-swatch::after { opacity: 1; }

/* Copy hint overlay */
.copy-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.45);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 2;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.color-card:hover .copy-hint { opacity: 1; }

/* Card info */
.card-info {
  padding: 0.65rem 0.7rem 0.55rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.4rem;
}

.card-code {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text);
  letter-spacing: 0.04em;
  word-break: break-all;
  line-height: 1.3;
  flex: 1;
}

/* Lock button */
.btn-lock {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 7px;
  cursor: pointer;
  font-size: 0.8rem;
  line-height: 1;
  color: var(--muted);
  transition: color var(--transition), transform var(--transition),
              background var(--transition), border-color var(--transition);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 3px;
}

.btn-lock .lock-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.btn-lock:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
  transform: scale(1.05);
}

.color-card.locked .btn-lock {
  color: var(--accent-2);
  border-color: var(--accent-2);
  background: rgba(245,100,200,0.1);
}

/* Badge de bloqueo sobre el swatch */
.lock-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 3;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  border-radius: 8px;
  padding: 5px 8px;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 4px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}

.color-card.locked .lock-badge {
  opacity: 1;
  transform: scale(1);
}

/* =============================================
   SAVE BUTTON (below grid)
   ============================================= */
/* Action bar (guardar + exportar) */
.palette-action-bar {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.btn-save-palette {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-2);
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  letter-spacing: 0.01em;
}

.btn-save-palette:hover {
  background: var(--surface);
  border-color: var(--accent);
  color: var(--accent);
}

/* Botón exportar PNG */
.btn-export-palette {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-2);
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  letter-spacing: 0.01em;
}

.btn-export-palette:hover {
  background: var(--surface);
  border-color: var(--accent-2);
  color: var(--accent-2);
}

/* =============================================
   SAVED PALETTES
   ============================================= */
.saved-section {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}

.saved-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.saved-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  font-style: italic;
  color: var(--text);
}

.btn-clear-all {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}

.btn-clear-all:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.empty-state {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  padding: 2rem 0;
}

.empty-state.hidden { display: none; }

/* Saved palette row */
.saved-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.saved-palette {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  animation: card-in 0.3s ease both;
  transition: border-color var(--transition);
}

.saved-palette:hover { border-color: var(--border-2); }

.saved-swatches {
  display: flex;
  gap: 4px;
  flex: 1;
  flex-wrap: wrap;
}

.saved-swatch {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.375rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.saved-swatch:hover { transform: scale(1.15); }

.saved-meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  white-space: nowrap;
}

.btn-delete-saved {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
  line-height: 1;
}

.btn-delete-saved:hover {
  color: var(--accent-2);
  background: rgba(245,100,200,0.1);
}

/* Segmentado de armonía — puede ser más largo, permite wrap */
.segmented--harmony {
  flex-wrap: wrap;
}

.segmented--harmony .seg-btn {
  font-size: 0.7rem;
  padding: 0.35rem 0.6rem;
}
.btn-unlock-all {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn-unlock-all:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

/* Botón cargar paleta guardada */
.btn-load-palette {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.25rem 0.375rem;
  border-radius: 0.25rem;
  transition: color var(--transition), background var(--transition);
  line-height: 1;
}

.btn-load-palette:hover {
  color: var(--accent);
  background: rgba(200,245,100,0.1);
}
.palette-name-input {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text);
  background: transparent;
  border: none;
  border-bottom: 1px dashed var(--border-2);
  padding: 2px 4px;
  width: 110px;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
  border-radius: 0;
  cursor: text;
}

.palette-name-input:focus {
  border-bottom-color: var(--accent);
  background: rgba(200,245,100,0.06);
  border-radius: 4px 4px 0 0;
}

.palette-name-input::placeholder {
  color: var(--muted);
  font-style: italic;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  text-align: center;
  padding: 1.5rem 2rem 2.5rem;
  border-top: 1px solid var(--border);
}

.footer-hint {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.footer-copy {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  opacity: 0.7;
}

.footer-key {
  display: inline-block;
  margin: 0 0.1em;
}

kbd.footer-key {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--text);
  letter-spacing: 0.03em;
}

/* =============================================
   BASE = MOBILE (estilos por defecto para celular)
   ============================================= */

/* Grid mobile: 3 columnas fijas */
.palette-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

/* Swatch más alto en mobile */
.card-swatch { aspect-ratio: 1 / 1.3; }

/* Código centrado, 1 línea, fuente chica */
.card-info {
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 0.4rem 0.4rem;
  gap: 0.3rem;
}

.card-code {
  font-size: 0.58rem;
  word-break: normal;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  width: 100%;
  letter-spacing: 0.02em;
}

.btn-lock {
  padding: 0.1875rem 0.375rem;
  font-size: 0.7rem;
}

.btn-lock .lock-label { font-size: 0.5rem; }

/* Header mobile */
.site-header { padding: 1.2rem 1rem 1rem; }
.header-inner { gap: 0.6rem; }
.logo { font-size: 2rem; }
.main-content { padding: 1.2rem 0.9rem 6rem; }

/* Controls mobile: columna */
.controls {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 1.5rem;
}

/* FAB fijo abajo en mobile */
.btn-generate {
  position: fixed;
  bottom: 1.4rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  margin-left: 0;
  width: auto;
  min-width: 11.25rem;
  justify-content: center;
  box-shadow: 0 6px 28px rgba(200,245,100,0.45);
  padding: 0.75rem 2rem;
  font-size: 0.95rem;
}

.btn-generate:hover  { transform: translateX(-50%) translateY(-2px); }
.btn-generate:active { transform: translateX(-50%) scale(0.97); }

/* Saved mobile */
.saved-swatches { gap: 0.25rem; }
.saved-swatch   { width: 1.625rem; height: 1.625rem; border-radius: 0.3125rem; }
.saved-palette  { flex-wrap: wrap; gap: 0.5rem; }
.saved-meta     { font-size: 0.6rem; }
.palette-name-input { width: 100%; }
.control-group  { flex-wrap: wrap; gap: 0.5rem; }
.saved-swatches { flex-wrap: wrap; }

/* =============================================
   TABLET — min-width: 421px
   ============================================= */
@media (min-width: 421px) {
  .palette-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }

  .controls { gap: 0.7rem; }
  .control-group { flex-wrap: nowrap; }
}

/* =============================================
   DESKTOP PEQUEÑO — min-width: 701px
   ============================================= */
@media (min-width: 701px) {
  /* Header vuelve a tamaño normal */
  .site-header { padding: 2.5rem 2rem 1.5rem; }
  .header-inner { gap: 1.5rem; }
  .logo { font-size: clamp(2rem, 5vw, 3.2rem); }
  .main-content { padding: 2rem 2rem 4rem; }

  /* Controls en fila */
  .controls {
    flex-direction: row;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
  }

  /* Botón generar: vuelve a ser estático */
  .btn-generate {
    position: static;
    transform: none;
    margin-left: auto;
    min-width: unset;
    box-shadow: 0 0 0 0 rgba(200,245,100,0.4);
    padding: 0.6rem 1.6rem;
    font-size: 0.9rem;
  }

  .btn-generate:hover  { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(200,245,100,0.3); }
  .btn-generate:active { transform: translateY(0) scale(0.97); }

  /* Grid desktop */
  .palette-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
  }

  /* Card info vuelve a fila */
  .card-swatch  { aspect-ratio: 1 / 1.1; }
  .card-info    { flex-direction: row; align-items: center; padding: 0.65rem 0.7rem 0.55rem; gap: 0.4rem; }
  .card-code    { font-size: 0.65rem; word-break: break-all; white-space: normal; text-align: left; width: auto; letter-spacing: 0.04em; }
  .btn-lock     { padding: 0.25rem 0.4375rem; font-size: 0.8rem; }
  .btn-lock .lock-label { font-size: 0.55rem; }

  /* Saved desktop */
  .saved-swatch { width: 1.75rem; height: 1.75rem; }
  .saved-palette { flex-wrap: nowrap; gap: 0.6rem; }
  .saved-meta   { font-size: 0.65rem; }
  .palette-name-input { width: 110px; }
}

/* =============================================
   DESKTOP GRANDE — min-width: 901px
   ============================================= */
@media (min-width: 901px) {
  .palette-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  }
}

/* =============================================
   DRAG & DROP
   ============================================= */
.color-card.draggable { cursor: grab; }
.color-card.draggable:active { cursor: grabbing; }

.color-card.dragging {
  opacity: 0.4;
  transform: scale(0.96);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.color-card.drag-over {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 0 0 2px var(--accent), var(--shadow);
  border-color: var(--accent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

/* =============================================
   COPY FLASH ANIMATION — suave
   ============================================= */
@keyframes copy-flash {
  0%   { opacity: 0.6; }
  50%  { opacity: 0.85; }
  100% { opacity: 1; }
}

.color-card.copied .card-swatch {
  animation: copy-flash 0.6s ease forwards;
}