/* ============================================================
   ZOILO INDUSTRIAL — Design System
   ============================================================ */

/* === 1. DESIGN TOKENS ========================================= */
:root {
  --c-black:        #0a0a0a;
  --c-dark-1:       #111111;
  --c-dark-2:       #161616;
  --c-dark-3:       #1e1e1e;
  --c-dark-card:    #242424;
  --c-steel-deep:   #0f1e30;
  --c-steel-dark:   #1a2f48;
  --c-steel:        #243d58;
  --c-petroleum:    #1b3d5a;
  --c-petroleum-md: #245474;
  --c-accent:       #3d8caa;
  --c-accent-light: #56aecf;
  --c-accent-glow:  rgba(61,140,170,0.3);
  --c-gray-dark:    #2e2e2e;
  --c-gray:         #5a6570;
  --c-gray-mid:     #7d8f9e;
  --c-gray-light:   #a8b8c8;
  --c-silver:       #c4d2e0;
  --c-white-dim:    #dde6ef;
  --c-white:        #edf2f7;
  --c-white-pure:   #ffffff;

  --border-dim:    1px solid rgba(255,255,255,0.06);
  --border-accent: 1px solid rgba(61,140,170,0.3);

  --f-display: 'Barlow Condensed', 'Arial Narrow', Arial, sans-serif;
  --f-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --t-fast: 0.15s ease;
  --t-base: 0.3s ease;
  --t-slow: 0.6s ease;

  --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:     0 4px 20px rgba(0,0,0,0.5);
  --shadow-lg:     0 8px 40px rgba(0,0,0,0.7);
  --shadow-accent: 0 4px 20px rgba(61,140,170,0.25);

  --r-sm: 3px;
  --r-md: 6px;
  --r-lg: 12px;

  --max-width:  1200px;
  --nav-height: 72px;

  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;
  --space-4xl: 8rem;
}

/* === 2. RESET ================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background-color: var(--c-black);
  color: var(--c-white);
  font-family: var(--f-body);
  line-height: 1.6;
  overflow-x: hidden;
}
body.no-scroll { overflow: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--t-base); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* === 3. TYPOGRAPHY ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--f-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
h1 { font-size: clamp(2.4rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 3vw, 2rem); }
h4 { font-size: clamp(1rem, 2vw, 1.35rem); }
p { color: var(--c-gray-light); max-width: 65ch; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--f-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--space-md);
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--c-accent);
}

/* === 4. LAYOUT ================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}
.section     { padding: var(--space-4xl) 0; }
.section--sm { padding: var(--space-3xl) 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--space-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-lg); }

/* === 5. BUTTONS =============================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.75em 2em;
  font-family: var(--f-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  transition: all var(--t-base);
}
.btn-primary {
  background: var(--c-accent);
  color: var(--c-white-pure);
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
  background: var(--c-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(61,140,170,0.45);
  color: var(--c-white-pure);
}
.btn-outline {
  background: transparent;
  color: var(--c-white);
  border: 1px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--c-accent);
  color: var(--c-accent-light);
  transform: translateY(-2px);
}

/* === 6. PRELOADER ============================================= */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  overflow: hidden;
}

.preloader-panel {
  position: absolute;
  top: 0;
  height: 100%;
  width: 50%;
  background-image: url('../src/porton-intro-new.png');
  background-size: 200% 100%;
  background-repeat: no-repeat;
  filter: brightness(0.78) contrast(1.08) saturate(0.85);
  will-change: transform;
}
.preloader-panel--left {
  left: 0;
  background-position: left center;
}
.preloader-panel--right {
  right: 0;
  background-position: right center;
}

/* Mobile: dos puertas que se abren hacia afuera */
@media (max-width: 768px) {
  .preloader-panel {
    transition: transform 1.1s cubic-bezier(0.77, 0, 0.175, 1);
  }
  #preloader.preloader-exit .preloader-panel--left  { transform: translateX(-100%); }
  #preloader.preloader-exit .preloader-panel--right { transform: translateX(100%); }
}

/* Desktop: preloader entero sube */
@media (min-width: 769px) {
  #preloader {
    will-change: transform;
    transition: transform 1.1s cubic-bezier(0.77, 0, 0.175, 1);
  }
  #preloader.preloader-exit { transform: translateY(-100%); }
}

/* === 7. HEADER & NAV ========================================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1), background var(--t-base), box-shadow var(--t-base);
}
.site-header.nav-hidden {
  transform: translateY(-100%);
}
.site-header.scrolled {
  background: rgba(10,10,10,0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex;
  align-items: center;
  line-height: 1;
  padding: 10px 0;
}
.logo img {
  height: 52px;
  width: auto;
  display: block;
  filter: drop-shadow(0 0 10px rgba(61,140,170,0.2));
  transition: filter var(--t-base);
}
.logo:hover img {
  filter: drop-shadow(0 0 14px rgba(86,174,207,0.4));
}
.nav { display: flex; align-items: center; gap: var(--space-xl); }
.nav a {
  font-family: var(--f-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gray-light);
  position: relative;
  padding: 0.25em 0;
}
.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--c-accent);
  transition: width var(--t-base);
}
.nav a:hover, .nav a.active { color: var(--c-white-pure); }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav-cta { margin-left: var(--space-sm); padding: 0.55em 1.3em !important; font-size: 0.74rem !important; }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; z-index: 201; }
.hamburger span { display: block; width: 26px; height: 2px; background: var(--c-white); transition: all var(--t-base); transform-origin: center; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 200;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}
.mobile-nav.open { display: flex; opacity: 1; pointer-events: all; }
.mobile-nav a {
  font-family: var(--f-display);
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-white-dim);
  transition: color var(--t-base);
}
.mobile-nav a:hover { color: var(--c-accent-light); }
.mobile-nav .btn { margin-top: var(--space-md); font-size: 1rem !important; }
.mobile-nav-close {
  position: absolute;
  top: var(--space-xl);
  right: var(--space-xl);
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-gray-light);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50%;
  transition: color var(--t-base), border-color var(--t-base), background var(--t-base);
  flex-shrink: 0;
}
.mobile-nav-close:hover {
  color: var(--c-white-pure);
  border-color: var(--c-accent);
  background: rgba(61,140,170,0.1);
}

/* === 8. HERO INDEX ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  /* INSERTAR: <video> o <img> con clase hero-media aquí */
  background:
    linear-gradient(135deg, var(--c-steel-deep) 0%, var(--c-dark-1) 65%),
    repeating-linear-gradient(0deg, transparent, transparent 48px, rgba(255,255,255,0.012) 48px, rgba(255,255,255,0.012) 49px),
    repeating-linear-gradient(90deg, transparent, transparent 48px, rgba(255,255,255,0.012) 48px, rgba(255,255,255,0.012) 49px);
}
.hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-tint {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--c-accent);
  flex-shrink: 0;
}
.hero h1 { margin-bottom: var(--space-lg); color: var(--c-white-pure); }
.hero h1 em { font-style: normal; color: var(--c-accent-light); }
.hero-desc {
  font-size: 1.05rem;
  color: var(--c-gray-light);
  margin-bottom: var(--space-2xl);
  max-width: 52ch;
}
.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(7px); }
}
.hero-scroll-arrow {
  width: 0; height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid rgba(255,255,255,0.25);
}

/* === 9. HERO INNER PAGES ====================================== */
.page-hero {
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--c-steel-deep) 0%, var(--c-black) 100%);
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(61,140,170,0.35), transparent);
}
.page-hero-bg-text {
  position: absolute;
  right: -1%;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-display);
  font-size: clamp(5rem, 16vw, 14rem);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.025);
  pointer-events: none;
  line-height: 1;
  white-space: nowrap;
}
.page-hero .section-label { margin-bottom: var(--space-sm); }
.page-hero h1 { margin-bottom: var(--space-md); }
.page-hero .lead {
  font-size: 1.05rem;
  color: var(--c-gray-light);
  max-width: 55ch;
}

/* === 10. SERVICES (INDEX) ===================================== */
.services { background: var(--c-dark-1); }
.services-header { margin-bottom: var(--space-3xl); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--r-md);
  overflow: hidden;
}
.service-card {
  background: var(--c-dark-2);
  padding: var(--space-2xl);
  transition: background var(--t-base);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transition: transform var(--t-base);
  transform-origin: left;
}
.service-card:hover { background: var(--c-dark-3); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon { width: 48px; height: 48px; margin-bottom: var(--space-lg); color: var(--c-accent); }
.service-card h3 { font-size: 1.5rem; margin-bottom: var(--space-md); color: var(--c-white); }
.service-card p { font-size: 0.9rem; line-height: 1.75; }
.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-top: var(--space-lg);
  transition: gap var(--t-base), color var(--t-base);
}
.service-link:hover { gap: 0.7em; color: var(--c-accent-light); }

/* === 11. STRIP / BANNER ======================================= */
.strip {
  background: linear-gradient(90deg, var(--c-steel-dark), var(--c-petroleum), var(--c-steel-dark));
  padding: var(--space-lg) 0;
  border-top: 1px solid rgba(255,255,255,0.07);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.strip-inner {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  justify-content: center;
  flex-wrap: wrap;
}
.strip-item { display: flex; align-items: center; gap: var(--space-md); }
.strip-icon { color: var(--c-accent-light); flex-shrink: 0; }
.strip-text {
  font-family: var(--f-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-white);
}
.strip-divider { width: 1px; height: 28px; background: rgba(255,255,255,0.12); }

/* === 12. PRODUCT CARDS ======================================== */
.products { background: var(--c-dark-1); }
.products-intro { max-width: 60ch; margin-bottom: var(--space-3xl); }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: var(--space-lg);
}
.product-card {
  background: var(--c-dark-3);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(61,140,170,0.3);
}
.product-img {
  aspect-ratio: 4/3;
  background: var(--c-dark-card);
  position: relative;
  overflow: hidden;
}
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow); }
.product-card:hover .product-img img { transform: scale(1.04); }
.product-img-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, var(--c-dark-card), var(--c-steel-dark));
  color: rgba(255,255,255,0.12);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--f-body);
}
.product-img-placeholder svg { width: 36px; height: 36px; opacity: 0.2; }

.product-body { padding: var(--space-lg); }
.product-tag {
  display: inline-block;
  padding: 0.2em 0.65em;
  background: rgba(61,140,170,0.12);
  color: var(--c-accent);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  margin-bottom: var(--space-sm);
  border: 1px solid rgba(61,140,170,0.2);
}
.product-body h3 { font-size: 1.2rem; margin-bottom: var(--space-sm); color: var(--c-white); }
.product-body p { font-size: 0.875rem; line-height: 1.7; }
.product-specs {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: var(--border-dim);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.spec-badge {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--c-gray-mid);
  background: rgba(255,255,255,0.04);
  padding: 0.25em 0.6em;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255,255,255,0.06);
}

/* Category headings within products pages */
.cat-heading {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.cat-heading h2 { margin-bottom: 0; }
.cat-heading-line { flex: 1; height: 1px; background: rgba(255,255,255,0.06); }
.cat-anchor { padding-top: var(--space-3xl); }

/* === 13. MATERIALS ============================================ */
.materials-section { background: var(--c-dark-2); }
.material-card {
  background: var(--c-dark-3);
  border: var(--border-dim);
  border-radius: var(--r-md);
  padding: var(--space-xl);
  transition: border-color var(--t-base), transform var(--t-base), box-shadow var(--t-base);
}
.material-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-accent);
}
.material-letter {
  font-family: var(--f-display);
  font-size: 4rem;
  font-weight: 900;
  color: rgba(255,255,255,0.05);
  line-height: 1;
  margin-bottom: var(--space-md);
}
.material-card h3 { color: var(--c-accent-light); margin-bottom: var(--space-sm); font-size: 1.4rem; }
.material-card p { font-size: 0.9rem; line-height: 1.75; }
.material-card ul { margin-top: var(--space-md); }
.material-card ul li {
  font-size: 0.85rem;
  color: var(--c-gray-light);
  padding: 0.3em 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  display: flex;
  align-items: center;
  gap: 0.5em;
}
.material-card ul li::before {
  content: '';
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--c-accent);
  flex-shrink: 0;
}

/* === 14. CONTACT ============================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-3xl);
  align-items: start;
}
.contact-form-wrap .lead {
  color: var(--c-gray-light);
  margin: var(--space-md) 0 var(--space-2xl);
  max-width: 50ch;
}
.form-group { margin-bottom: var(--space-lg); }
.form-group label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gray-mid);
  margin-bottom: var(--space-sm);
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--c-dark-3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--r-sm);
  padding: 0.75em 1em;
  color: var(--c-white);
  font-size: 0.95rem;
  transition: border-color var(--t-base), box-shadow var(--t-base);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(61,140,170,0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.18); }
.form-group textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
.form-status {
  margin-top: var(--space-md);
  padding: 0.85em 1em;
  border-radius: var(--r-sm);
  font-size: 0.88rem;
  display: none;
}
.form-status.success {
  display: block;
  background: rgba(61,140,170,0.12);
  border: 1px solid rgba(61,140,170,0.4);
  color: var(--c-accent-light);
}
.form-status.error {
  display: block;
  background: rgba(200,60,60,0.08);
  border: 1px solid rgba(200,60,60,0.35);
  color: #f09090;
}

.contact-info {
  background: var(--c-dark-3);
  border: var(--border-dim);
  border-radius: var(--r-md);
  padding: var(--space-xl);
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
}
.contact-info h3 {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: var(--border-dim);
  font-size: 1.2rem;
}
.info-item { display: flex; gap: var(--space-md); margin-bottom: var(--space-lg); }
.info-icon {
  width: 40px; height: 40px;
  background: rgba(61,140,170,0.08);
  border: 1px solid rgba(61,140,170,0.2);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-accent);
  flex-shrink: 0;
}
.info-icon svg { width: 18px; height: 18px; }
.info-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-gray);
  margin-bottom: 0.3rem;
}
.info-value { font-size: 0.9rem; color: var(--c-white); line-height: 1.55; }
.info-value a:hover { color: var(--c-accent-light); }

/* === 15. FAQ ================================================== */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { border-bottom: var(--border-dim); }
.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--space-lg) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  background: none;
  color: var(--c-white);
  font-family: var(--f-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color var(--t-base);
}
.faq-question:hover { color: var(--c-accent-light); }
.faq-icon {
  width: 26px; height: 26px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--c-accent);
  font-size: 1.2rem;
  line-height: 1;
  transition: transform var(--t-base), border-color var(--t-base);
  font-family: var(--f-body);
  font-weight: 300;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  border-color: var(--c-accent);
}
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-answer-inner {
  padding-bottom: var(--space-lg);
  font-size: 0.95rem;
  color: var(--c-gray-light);
  line-height: 1.8;
}
.faq-answer-inner p { max-width: 100%; }
.faq-item.open .faq-answer { max-height: 500px; }

/* === 16. FOOTER =============================================== */
.site-footer {
  background: var(--c-dark-1);
  border-top: var(--border-dim);
  padding: var(--space-3xl) 0 var(--space-xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}
.footer-brand .logo { margin-bottom: var(--space-lg); padding: 0; }
.footer-brand .logo img { height: 40px; }
.footer-brand p { font-size: 0.875rem; line-height: 1.75; max-width: 28ch; }
.footer-col h4 {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gray);
  margin-bottom: var(--space-lg);
  font-family: var(--f-body);
}
.footer-col ul li { margin-bottom: var(--space-sm); }
.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--c-gray-light);
  transition: color var(--t-base), padding-left var(--t-base);
}
.footer-col ul li a:hover { color: var(--c-accent-light); padding-left: 5px; }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: var(--space-sm);
  font-size: 0.85rem;
  color: var(--c-gray-light);
}
.footer-contact-item svg { width: 14px; height: 14px; color: var(--c-accent); flex-shrink: 0; margin-top: 3px; }
.footer-bottom {
  padding-top: var(--space-lg);
  border-top: var(--border-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.footer-copy { font-size: 0.8rem; color: var(--c-gray); }
.footer-legal { display: flex; gap: var(--space-lg); }
.footer-legal a { font-size: 0.8rem; color: var(--c-gray); transition: color var(--t-base); }
.footer-legal a:hover { color: var(--c-accent-light); }

/* === 17. CTA SECTION ========================================= */
.cta-section {
  background: linear-gradient(135deg, var(--c-steel-dark) 0%, var(--c-petroleum) 100%);
  padding: var(--space-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg, transparent, transparent 32px,
    rgba(255,255,255,0.012) 32px, rgba(255,255,255,0.012) 33px
  );
}
.cta-content { position: relative; z-index: 1; }
.cta-content h2 { margin-bottom: var(--space-md); }
.cta-content .lead { max-width: 50ch; margin: 0 auto var(--space-2xl); font-size: 1.05rem; }
.cta-actions { display: flex; gap: var(--space-md); justify-content: center; flex-wrap: wrap; }

/* === 18. 404 PAGE ============================================= */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl);
  flex-direction: column;
}
.error-bg-num {
  font-family: var(--f-display);
  font-size: clamp(7rem, 22vw, 16rem);
  font-weight: 900;
  line-height: 1;
  color: rgba(255,255,255,0.03);
  letter-spacing: 0.05em;
  position: absolute;
  pointer-events: none;
}
.error-content { position: relative; z-index: 1; }
.error-title {
  font-family: var(--f-display);
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--c-white-pure);
  margin-bottom: var(--space-md);
}
.error-badge {
  display: inline-block;
  font-family: var(--f-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-accent);
  border: 1px solid rgba(61,140,170,0.35);
  padding: 0.4em 1em;
  border-radius: var(--r-sm);
  margin-bottom: var(--space-xl);
}
.error-desc { max-width: 40ch; margin: 0 auto var(--space-2xl); font-size: 1rem; }

/* === 19. LEGAL =============================================== */
.legal-wrap {
  max-width: 780px;
  margin: 0 auto;
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-4xl);
}
.legal-wrap h1 { margin-bottom: var(--space-sm); }
.legal-meta {
  font-size: 0.82rem;
  color: var(--c-gray);
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-lg);
  border-bottom: var(--border-dim);
}
.legal-wrap h2 {
  font-size: 1.25rem;
  margin: var(--space-2xl) 0 var(--space-md);
  color: var(--c-white);
}
.legal-wrap p,
.legal-wrap li {
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--c-gray-light);
  margin-bottom: var(--space-md);
  max-width: 100%;
}
.legal-wrap ul { padding-left: var(--space-lg); list-style: disc; }

/* === 20. ANIMATIONS ========================================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.anim-up { opacity: 0; animation: fadeUp 0.7s ease forwards; }
.anim-up.d1 { animation-delay: 0.1s; }
.anim-up.d2 { animation-delay: 0.22s; }
.anim-up.d3 { animation-delay: 0.34s; }
.anim-up.d4 { animation-delay: 0.46s; }
.anim-up.d5 { animation-delay: 0.58s; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* === 21. RESPONSIVE ========================================== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-grid { grid-template-columns: repeat(2,1fr); }
  .services-grid { grid-template-columns: 1fr; gap: 1px; }
}
@media (max-width: 768px) {
  :root { --space-4xl: 4.5rem; --space-3xl: 3rem; }
  .nav { display: none; }
  .hamburger { display: flex; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .contact-info { position: static; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .cta-actions { flex-direction: column; align-items: center; }
  .strip-inner { flex-direction: column; gap: var(--space-lg); }
  .strip-divider { display: none; }
}
@media (max-width: 480px) {
  .container { padding: 0 var(--space-lg); }
}