/* ============================================================
   EXCAVACIONES BCN — Global CSS
   Paleta: Tierra/Industrial con acento ámbar/naranja y negro profundo
   ============================================================ */

:root {
  /* Colores principales */
  --c-black:       #0D0D0D;
  --c-dark:        #161614;
  --c-dark-2:      #1F1F1C;
  --c-dark-3:      #2A2A26;
  --c-amber:       #E8A020;
  --c-amber-light: #F4BA50;
  --c-amber-dark:  #C4841A;
  --c-earth:       #8B6914;
  --c-red:         #C0392B;
  --c-white:       #F5F0E8;
  --c-off-white:   #EDE8DE;
  --c-gray:        #999890;
  --c-gray-light:  #C8C4B8;
  --c-border:      rgba(232,160,32,0.2);

  /* Tipografía */
  --f-display: 'Bebas Neue', 'Impact', sans-serif;
  --f-condensed: 'Barlow Condensed', sans-serif;
  --f-body:    'Barlow', sans-serif;

  /* Espacios */
  --s-xs: 0.5rem;
  --s-sm: 1rem;
  --s-md: 2rem;
  --s-lg: 4rem;
  --s-xl: 8rem;

  /* Radios */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 16px;

  /* Sombras */
  --shadow-glow: 0 0 40px rgba(232,160,32,0.25);
  --shadow-card: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-btn:  0 4px 20px rgba(232,160,32,0.4);

  /* Transiciones */
  --t-fast: 0.15s ease;
  --t-mid:  0.3s ease;
  --t-slow: 0.6s cubic-bezier(0.23,1,0.32,1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  background-color: var(--c-dark);
  color: var(--c-white);
  font-family: var(--f-body);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: inherit; text-decoration: none; transition: color var(--t-fast); }
ul  { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--f-display);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--c-white);
}

.text-amber    { color: var(--c-amber); }
.text-gray     { color: var(--c-gray); }
.text-condensed { font-family: var(--f-condensed); }

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--s-md);
}

/* ---- Section spacing ---- */
.section { padding: var(--s-xl) 0; }
.section--sm { padding: var(--s-lg) 0; }

/* ---- CTA Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 2.4rem;
  font-family: var(--f-condensed);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  transition: all var(--t-mid);
}

.btn-primary {
  background: var(--c-amber);
  color: var(--c-black);
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: var(--c-amber-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(232,160,32,0.5);
}

.btn-outline {
  border: 2px solid var(--c-amber);
  color: var(--c-amber);
  background: transparent;
}
.btn-outline:hover {
  background: var(--c-amber);
  color: var(--c-black);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: #25D366;
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,211,102,0.3);
}
.btn-whatsapp:hover {
  background: #1ebe5a;
  transform: translateY(-2px);
}

/* ---- Section Label ---- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--f-condensed);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-amber);
  margin-bottom: 1rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 2px;
  background: var(--c-amber);
}

/* ---- Decorative diagonal separator ---- */
.diagonal-sep {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  line-height: 0;
}
.diagonal-sep svg { display: block; }

/* ---- Noise overlay ---- */
.noise-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px;
}

/* ---- Cards ---- */
.card {
  background: var(--c-dark-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform var(--t-mid), box-shadow var(--t-mid), border-color var(--t-mid);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
  border-color: rgba(232,160,32,0.5);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--c-dark); }
::-webkit-scrollbar-thumb { background: var(--c-amber-dark); border-radius: 3px; }

/* ---- Utilities ---- */
.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;
}
.text-center { text-align: center; }
.mt-1 { margin-top: var(--s-sm); }
.mt-2 { margin-top: var(--s-md); }
.mt-3 { margin-top: var(--s-lg); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--s-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--s-md); }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .grid-3 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  :root { --s-xl: 4rem; --s-lg: 2.5rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .container { padding: 0 1.2rem; }
}

/* ---- Animations ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes slideRight {
  from { transform: translateX(-20px); opacity: 0; }
  to   { transform: translateX(0);     opacity: 1; }
}
@keyframes pulse-amber {
  0%, 100% { box-shadow: 0 0 0 0 rgba(232,160,32,0.4); }
  50%       { box-shadow: 0 0 0 12px rgba(232,160,32,0); }
}

.animate-fadeup  { animation: fadeUp  0.7s var(--t-slow) both; }
.animate-fadein  { animation: fadeIn  0.5s ease both; }
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* Intersection Observer-triggered animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--t-slow), transform 0.7s var(--t-slow);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}