/**
 * @file: layout.css
 * @description: Layout Structure & Section Styles (BEM)
 * @requires: variables.css
 */

/* =========================================
   1. NAVIGATION - BEM
   ========================================= */

.navbar {
  padding: var(--space-sm) 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  background-color: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* =========================================
   2. HERO SECTION - BEM
   ========================================= */

.hero {
  padding-top: var(--space-xl);
  /* Offset for fixed nav */
  padding-bottom: var(--space-lg);
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
}

/* BACKGROUND GRID EFFECT */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(
      rgba(0, 224, 255, 0.03) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(0, 224, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -1;
  mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
}

.hero__content {
  max-width: 850px;
}

.hero__title {
  font-size: clamp(2.2rem, 5vw, 3rem);
  margin-bottom: var(--space-md);
}

.hero__title span {
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: 1rem;
  max-width: 600px;
  margin-bottom: var(--space-md);
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-sm);
}

/* =========================================
   3. FEATURES SECTION - BEM
   ========================================= */

.features {
  padding: var(--space-lg) 0;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

/* =========================================
   4. FOOTER - BEM
   ========================================= */

.footer {
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.9rem;
}

/* =========================================
   5. HEADER SCROLL BEHAVIOR
   ========================================= */

#main-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  /*
 background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(14px);
  */
  background-color: var(--color-bg-surface);

  border-bottom: 1px solid var(--color-border);
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}

#main-header.header-visible {
  transform: translateY(0);
}

/* =========================================
   6. RESPONSIVE UTILITIES
   ========================================= */

@media (max-width: 768px) {
  .hero {
    text-align: left;
    /* Keep left alignment for readability on mobile */
    padding-top: var(--space-xl);
  }
}

/* =========================================
   7. SECTION BACKGROUND VARIANTS (mínimo)
   ========================================= */

.section--body {
  background-color: var(--color-bg-body);
}

.section--surface {
  background-color: var(--color-bg-surface);
}

.section--alt {
  background-color: var(--color-bg-alt);
}