/* =============================================
   BASE — ServiHogar
   Variables, reset, tipografía, utilidades, botones
============================================= */

/* Custom Properties */
:root {
  --color-primary:      #1a3038;
  --color-secondary:    #2d4f58;
  --color-gold:         #b08a5a;
  --color-gold-light:   #d4a96a;
  --color-white:        #ffffff;
  --color-bg-warm:      #f7f4f0;
  --color-text-dark:    #1a1a1a;
  --color-text-mid:     #4a5568;
  --color-whatsapp:     #25d366;
  --color-whatsapp-dark:#128c7e;

  --shadow-sm:   0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
  --shadow-md:   0 4px 12px rgba(0,0,0,.14);
  --shadow-lg:   0 10px 30px rgba(0,0,0,.18);
  --shadow-gold: 0 4px 20px rgba(176,138,90,.35);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --transition:      .25s ease;
  --transition-slow: .45s ease;

  --max-w:          1200px;
  --section-pad-y:  5rem;
  --section-pad-x:  1.25rem;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text-dark);
  background: var(--color-white);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -9999px;
  left: 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  padding: .5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 9999;
  transition: top var(--transition);
}

.skip-link:focus {
  top: 1rem;
}

/* Utilities */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--section-pad-x);
}

.section {
  padding-block: var(--section-pad-y);
}

.eyebrow {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: .75rem;
}

.section-title {
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--color-text-mid);
  max-width: 60ch;
  line-height: 1.7;
}

/* Scroll reveal */
.js-reveal {
  opacity: 1;
  transform: none;
  transition: opacity .5s ease, transform .5s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .js-reveal {
    opacity: 0;
    transform: translateY(20px);
  }
  .js-reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: .9375rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  transition:
    background var(--transition), color var(--transition),
    border-color var(--transition), transform var(--transition),
    box-shadow var(--transition);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 3px;
}

.btn:active { transform: scale(.97); }

.btn-gold {
  background: var(--color-gold);
  color: var(--color-white);
  border-color: var(--color-gold);
}
.btn-gold:hover {
  background: var(--color-gold-light);
  border-color: var(--color-gold-light);
  box-shadow: var(--shadow-gold);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-dark:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: var(--color-white);
  border-color: var(--color-whatsapp);
}
.btn-whatsapp:hover {
  background: var(--color-whatsapp-dark);
  border-color: var(--color-whatsapp-dark);
  box-shadow: 0 4px 16px rgba(37,211,102,.4);
  transform: translateY(-2px);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,.55);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,.12);
  border-color: var(--color-white);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border-color: rgba(26,48,56,.4);
}
.btn-outline-dark:hover {
  background: rgba(26,48,56,.08);
  border-color: var(--color-primary);
}

/* Desktop section padding */
@media (min-width: 640px) {
  :root {
    --section-pad-y: 6.5rem;
    --section-pad-x: 2rem;
  }
}