/* =====================================================================
   Velas SISU — Hoja de estilos única
   Sumario:
     1.  Google Fonts (@import, display=swap)
     2.  Variables
     3.  Reset y base
     4.  Tipografía
     5.  Layout (contenedores, grids)
     6.  Header sticky
     7.  Botones (primario, secundario, WhatsApp)
     8.  Hero
     9.  Sección líneas
     10. Selector (steps, stages, nav, summary, chips)
     11. Cómo funciona
     12. Testimonios
     13. Nosotros
     14. Footer
     15. 404
     16. Placeholders de imagen
     17. Utilidades
     18. Responsive (≥640 / ≥960)
   ===================================================================== */

/* 1. Google Fonts ----------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Playfair+Display:wght@400;700&display=swap');

/* 2. Variables -------------------------------------------------------- */
:root {
  /* Paleta */
  --color-primary:     #1B2A4A;   /* Deep navy */
  --color-accent:      #C8903A;   /* Warm amber */
  --color-accent-dark: #A6742C;
  --color-bg:          #FAF8F4;   /* Warm white */
  --color-surface:     #FFFFFF;
  --color-text:        #1A1A1A;
  --color-text-muted:  #6B6560;
  --color-border:      #E8E4DE;
  --color-whatsapp:    #25D366;
  --color-whatsapp-dark: #1DA851;

  /* Tipografía */
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Espaciado */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  /* Layout */
  --container-max: 1200px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  /* Sombras */
  --shadow-sm: 0 1px 2px rgba(27, 42, 74, 0.04);
  --shadow:    0 4px 16px rgba(27, 42, 74, 0.08);
  --shadow-lg: 0 12px 32px rgba(27, 42, 74, 0.12);

  /* Transiciones */
  --t-fast: 150ms ease;
  --t: 250ms ease;
  --header-h: 60px;
}

/* 3. Reset y base ----------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, picture, svg { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }

/* Foco accesible para todo */
a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 4. Tipografía ------------------------------------------------------- */
h1, h2, h3, h4 { font-family: var(--font-heading); color: var(--color-primary); line-height: 1.2; font-weight: 700; }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; }

p { margin-bottom: var(--space-4); }
small { font-size: 0.875rem; }
.lead { font-size: 1.125rem; color: var(--color-text-muted); }

.section-title {
  text-align: center;
  margin-bottom: var(--space-2);
}
.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-6);
}

/* 5. Layout ----------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section {
  padding: var(--space-7) 0;
}

.grid { display: grid; gap: var(--space-5); }
.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }

/* 6. Header ----------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 244, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-h);
  padding: var(--space-2) var(--space-4);
  max-width: var(--container-max);
  margin: 0 auto;
}
.site-header__logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}
.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.site-header__phone {
  display: none;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-primary);
  white-space: nowrap;
}
.site-header__phone svg { vertical-align: middle; margin-right: 6px; }
.site-header__link {
  color: var(--color-primary);
  font-weight: 500;
  padding: var(--space-2) 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-bottom: 2px solid transparent;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.site-header__link:hover { border-bottom-color: var(--color-accent); }

/* 7. Botones ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  transition: transform var(--t-fast), box-shadow var(--t-fast), background var(--t-fast), color var(--t-fast);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) { background: #14223c; box-shadow: var(--shadow); }
.btn-primary:disabled {
  background: var(--color-border);
  color: var(--color-text-muted);
  cursor: not-allowed;
  box-shadow: none;
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
  min-height: 48px;
}
.btn-secondary:hover:not(:disabled) { border-color: var(--color-primary); }

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover { background: var(--color-accent-dark); }

.btn-link {
  color: var(--color-accent);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: gap var(--t-fast), color var(--t-fast);
}
.btn-link:hover { color: var(--color-accent-dark); gap: 0.65rem; }

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: #fff;
  min-height: 52px;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 0.85rem 1.75rem;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}
.btn-whatsapp:hover { background: var(--color-whatsapp-dark); box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45); }
.btn-whatsapp svg { width: 22px; height: 22px; fill: currentColor; flex-shrink: 0; }

/* 8. Hero ------------------------------------------------------------- */
.hero {
  position: relative;
  padding: var(--space-7) 0 var(--space-8);
  overflow: hidden;
}
.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-5);
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.hero h1 { margin-bottom: var(--space-3); max-width: 18ch; }
.hero__sub {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 32ch;
}
.hero__cta-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.hero__phone {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}
.hero__phone a { color: var(--color-primary); font-weight: 600; }

/* Hero placeholder (no real photo yet) */
.hero__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 460px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-primary) 0%, #2a3d63 55%, var(--color-accent) 130%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.55);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero__image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(200, 144, 58, 0.18), transparent 60%);
}

/* 9. Sección líneas --------------------------------------------------- */
.line-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--t), box-shadow var(--t);
}
.line-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.line-card__img {
  aspect-ratio: 4 / 3;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.08em;
}
.line-card--signature .line-card__img { background: linear-gradient(135deg, #1B2A4A, #C8903A); }
.line-card--forma .line-card__img     { background: linear-gradient(135deg, #2D4A2D, #B695C0); }
.line-card--zen .line-card__img       { background: linear-gradient(135deg, #A8C5A0, #E8F4F0); color: rgba(27,42,74,0.7); }

.line-card__body { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.line-card__body h3 { color: var(--color-primary); }
.line-card__body p { color: var(--color-text-muted); font-size: 0.95rem; margin-bottom: 0; flex: 1; }
.line-card__cta { align-self: flex-start; }

/* 10. Selector -------------------------------------------------------- */
.selector {
  background: linear-gradient(180deg, var(--color-bg) 0%, #f3efe7 100%);
}
.selector__header { text-align: center; margin-bottom: var(--space-6); }

/* Step indicator */
.selector__steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 0 auto var(--space-6);
  max-width: 540px;
}
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 0 0 auto;
}
.step__circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  color: var(--color-text-muted);
  font-weight: 600;
  font-family: var(--font-body);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t);
  position: relative;
  z-index: 2;
}
.step__label {
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
}
.step.active .step__circle {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(200, 144, 58, 0.15);
}
.step.active .step__label { color: var(--color-primary); font-weight: 600; }
.step.done .step__circle {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.step__line {
  flex: 1;
  height: 2px;
  background: var(--color-border);
  margin: 0 4px;
  margin-bottom: 18px; /* alinea con círculo, no con label */
  transition: background var(--t);
  min-width: 16px;
}
.step__line.done { background: var(--color-primary); }

/* Stage transitions */
.selector__stage {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  padding: var(--space-5);
  min-height: 220px;
  display: flex;
  flex-direction: column;
}
.selector__stage.hidden { display: none; }
.selector__stage-head {
  margin-bottom: var(--space-4);
}
.selector__stage-head h3 { color: var(--color-primary); }
.selector__stage-head p { color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 0; }

.stage-enter {
  animation: stageEnter var(--t);
}
@keyframes stageEnter {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Opciones seleccionables dentro del stage */
.select-grid { display: grid; gap: var(--space-3); grid-template-columns: 1fr; }

.option-card {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  padding: var(--space-4);
  cursor: pointer;
  transition: border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 44px;
  position: relative;
}
.option-card:hover { border-color: var(--color-accent); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.option-card.selected {
  border-color: var(--color-accent);
  background: rgba(200, 144, 58, 0.06);
  box-shadow: 0 0 0 3px rgba(200, 144, 58, 0.12);
}
.option-card.selected::after {
  content: '✓';
  position: absolute;
  top: 10px;
  right: 12px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.option-card__title { font-weight: 600; color: var(--color-primary); }
.option-card__desc { font-size: 0.875rem; color: var(--color-text-muted); }
.option-card__price { font-weight: 700; color: var(--color-accent-dark); font-size: 1.05rem; }

/* Tamaños: botones */
.size-grid { display: grid; gap: var(--space-3); grid-template-columns: 1fr; }
.size-btn {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  padding: var(--space-4);
  cursor: pointer;
  transition: all var(--t-fast);
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 56px;
}
.size-btn:hover { border-color: var(--color-accent); }
.size-btn.selected {
  border-color: var(--color-accent);
  background: rgba(200, 144, 58, 0.06);
  box-shadow: 0 0 0 3px rgba(200, 144, 58, 0.12);
}
.size-btn__label { font-weight: 600; color: var(--color-primary); }
.size-btn__price { font-weight: 700; color: var(--color-accent-dark); }

/* Aroma chips */
.scent-grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
.scent-chip {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  padding: var(--space-4);
  cursor: pointer;
  transition: all var(--t-fast);
  text-align: center;
  min-height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.scent-chip:hover { border-color: var(--color-accent); transform: translateY(-2px); }
.scent-chip.selected {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(200, 144, 58, 0.12);
}
.scent-swatch {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  position: relative;
  box-shadow: inset 0 0 0 2px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.1);
  flex-shrink: 0;
}
.scent-chip.selected .scent-swatch::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.4rem;
  text-shadow: 0 1px 3px rgba(0,0,0,0.4);
  mix-blend-mode: difference;
}
.scent-chip__name { font-size: 0.9rem; font-weight: 500; color: var(--color-primary); }

/* Nav buttons */
.selector__nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.selector__nav .hidden { visibility: hidden; pointer-events: none; }

/* Summary */
.selector__summary {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  margin-top: var(--space-5);
}
.selector__summary.hidden { display: none; }
.summary-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
.summary__img {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.75);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
}
.summary__img.signature { background: linear-gradient(135deg, #1B2A4A, #C8903A); }
.summary__img.forma     { background: linear-gradient(135deg, #2D4A2D, #B695C0); }
.summary__img.zen       { background: linear-gradient(135deg, #A8C5A0, #E8F4F0); color: rgba(27,42,74,0.7); }

.summary__list { display: flex; flex-direction: column; gap: var(--space-3); }
.summary__row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px dashed var(--color-border);
  font-size: 0.95rem;
}
.summary__row:last-child { border-bottom: none; }
.summary__row dt { color: var(--color-text-muted); }
.summary__row dd { font-weight: 600; color: var(--color-text); text-align: right; }
.summary__price {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  text-align: right;
  margin-top: var(--space-2);
}
.summary__cta { display: block; width: 100%; margin-top: var(--space-4); }

/* 11. Cómo funciona --------------------------------------------------- */
.how-step { text-align: center; display: flex; flex-direction: column; align-items: center; gap: var(--space-3); }
.how-step__icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(200, 144, 58, 0.12);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}
.how-step__icon svg { width: 32px; height: 32px; }
.how-step h3 { color: var(--color-primary); }
.how-step p { color: var(--color-text-muted); margin-bottom: 0; }

/* 12. Testimonios ----------------------------------------------------- */
.testimonial {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.testimonial__stars { color: var(--color-accent); letter-spacing: 2px; }
.testimonial__quote {
  font-style: italic;
  color: var(--color-text);
  flex: 1;
}
.testimonial__author { font-weight: 600; color: var(--color-primary); }
.testimonial__city { color: var(--color-text-muted); font-size: 0.875rem; }

/* 13. Nosotros -------------------------------------------------------- */
.page-hero {
  padding: var(--space-7) 0 var(--space-6);
  text-align: center;
}
.page-hero h1 { margin-bottom: var(--space-4); }
.page-hero p { color: var(--color-text-muted); max-width: 60ch; margin: 0 auto; font-size: 1.1rem; }

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}
.process-step__num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.process-step h3 { color: var(--color-primary); }
.process-step p { color: var(--color-text-muted); margin-bottom: 0; }

.materials-list { display: flex; flex-direction: column; gap: var(--space-4); max-width: 720px; margin: 0 auto; }
.material-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.material-item__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(168, 197, 160, 0.25);
  color: #2D4A2D;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}
.material-item h3 { font-size: 1.1rem; color: var(--color-primary); margin-bottom: 4px; }
.material-item p { color: var(--color-text-muted); margin-bottom: 0; font-size: 0.95rem; }

/* 14. Footer ---------------------------------------------------------- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-7) 0 var(--space-5);
  margin-top: var(--space-7);
}
.site-footer a { color: rgba(255,255,255,0.85); }
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}
.site-footer__logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: #fff;
}
.site-footer__tagline { color: rgba(255,255,255,0.7); font-size: 0.95rem; margin-top: var(--space-2); }
.site-footer h4 { color: #fff; font-family: var(--font-body); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-3); }
.site-footer ul { display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
}
.site-footer__phone { display: inline-flex; align-items: center; gap: 6px; color: #fff; font-weight: 500; }
.site-footer__phone svg { width: 18px; height: 18px; fill: currentColor; }

/* 15. 404 ------------------------------------------------------------- */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  text-align: center;
}
.error-page__inner { max-width: 480px; }
.error-page__code {
  font-family: var(--font-heading);
  font-size: 5rem;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-4);
}
.error-page h1 { margin-bottom: var(--space-4); }
.error-page p { color: var(--color-text-muted); margin-bottom: var(--space-6); }
.error-page__actions { display: flex; flex-direction: column; gap: var(--space-3); align-items: center; }

/* 16. Placeholders imagen --------------------------------------------- */
.ph-img {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

/* 17. Utilidades ------------------------------------------------------ */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.hidden { display: none !important; }
.visually-hidden-btn { visibility: hidden !important; pointer-events: none !important; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }

/* 18. Responsive ------------------------------------------------------ */
/* ≥640px — Tablet */
@media (min-width: 640px) {
  .site-header__phone { display: inline-flex; align-items: center; }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .select-grid { grid-template-columns: repeat(2, 1fr); }
  .size-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: var(--space-8) 0; }
  .hero__inner { gap: var(--space-6); }
  .hero__cta-group { flex-direction: row; }
  .summary-grid { grid-template-columns: 1fr 1.2fr; align-items: start; }
  .error-page__actions { flex-direction: row; justify-content: center; }
  .site-footer__grid { grid-template-columns: 2fr 1fr 1fr; }
  .site-footer__bottom { flex-direction: row; justify-content: space-between; align-items: center; }
}

/* ≥960px — Desktop */
@media (min-width: 960px) {
  h1 { font-size: 2.75rem; }
  h2 { font-size: 1.85rem; }
  .section { padding: var(--space-8) 0; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .select-grid { grid-template-columns: repeat(3, 1fr); }
  .size-grid { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { gap: var(--space-7); }
  .hero__image { max-height: 520px; }
}

/* Reducción de movimiento */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}