/* 
   FILTEC Polyplast - Custom Design System (Industrial Excellence Core)
   Vanilla CSS Implementation
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* --- Design Tokens --- */
:root {
  /* Color Palette */
  --color-primary: #bd0011;
  --color-primary-container: #e32726;
  --color-secondary: #1B2A4A; /* Updated deep B2B Navy from DESIGN.md text */
  --color-secondary-light: #4f5e81;
  --color-secondary-container: #c5d4fd;
  
  --color-background: #fbf9f9;
  --color-surface: #fbf9f9;
  --color-surface-dim: #dbdad9;
  --color-surface-bright: #fbf9f9;
  --color-surface-lowest: #ffffff;
  --color-surface-low: #f5f3f3;
  --color-surface-container: #efeded;
  --color-surface-high: #e9e8e7;
  --color-surface-highest: #e4e2e2;
  
  --color-on-surface: #1b1c1c;
  --color-on-surface-variant: #5d3f3c;
  --color-text-navy: #121C32;
  --color-text-slate: #4A5568;
  
  --color-border: #E0E0E0;
  --color-outline: #916f6b;
  --color-outline-variant: #e6bdb8;
  
  --color-error: #ba1a1a;
  
  /* Spacing */
  --container-max: 1280px;
  --gutter: 24px;
  --margin-mobile: 16px;
  --margin-desktop: 48px;
  --stack-sm: 8px;
  --stack-md: 16px;
  --stack-lg: 32px;
  --section-padding: 80px;
  
  /* Shapes / Border Radius */
  --radius-sm: 0.125rem; /* 2px */
  --radius-default: 0.25rem; /* 4px */
  --radius-md: 0.375rem; /* 6px */
  --radius-lg: 0.5rem; /* 8px */
  --radius-xl: 0.75rem; /* 12px */
  --radius-full: 9999px;
  
  /* Grid & Columns */
  --grid-columns: 12;
}

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

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--color-background);
  color: var(--color-on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  padding-top: 80px; /* Offset for fixed header */
}

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

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

.material-symbols-outlined {
  flex-shrink: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* --- Typography --- */
.display-lg {
  font-size: clamp(2rem, 5vw, 3rem); /* scales fluidly from 32px to 48px */
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text-navy);
}

.headline-lg {
  font-size: clamp(1.5rem, 4vw, 2rem); /* scales fluidly from 24px to 32px */
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text-navy);
}

.headline-md {
  font-size: clamp(1.2rem, 3vw, 1.5rem); /* scales fluidly from 19.2px to 24px */
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text-navy);
}

.body-lg {
  font-size: clamp(1rem, 2vw, 1.125rem); /* scales fluidly from 16px to 18px */
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-slate);
}

.body-md {
  font-size: 1rem; /* 16px standard */
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text-slate);
}

.label-bold {
  font-size: 0.875rem; /* 14px */
  font-weight: 600;
  line-height: 1.25rem; /* 20px */
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.caption {
  font-size: 0.75rem; /* 12px */
  font-weight: 500;
  line-height: 1rem; /* 16px */
  color: var(--color-text-slate);
}

/* --- Layout & Grid --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--margin-desktop);
  padding-right: var(--margin-desktop);
}

.section-padding {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

.grid {
  display: grid;
  gap: var(--gutter);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-12 { grid-template-columns: repeat(12, 1fr); }

.flex { display: flex; }
.flex-column { flex-direction: column; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.flex-wrap { flex-wrap: wrap; }

.gap-sm { gap: var(--stack-sm); }
.gap-md { gap: var(--stack-md); }
.gap-lg { gap: var(--stack-lg); }

/* --- Header / Navigation --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: var(--color-surface-lowest);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-container);
  letter-spacing: -0.01em;
}

.logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--stack-lg);
  list-style: none;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-secondary);
  position: relative;
  padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-secondary);
  font-size: 1.75rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

/* Mobile Drawer */
.drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 200;
  visibility: hidden;
  transition: visibility 0.3s ease;
}

.drawer.open {
  visibility: visible;
}

.drawer-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(27, 42, 74, 0.5); /* Navy with 50% opacity */
  opacity: 0;
  transition: opacity 0.3s ease;
}

.drawer.open .drawer-backdrop {
  opacity: 1;
}

.drawer-content {
  position: absolute;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100%;
  background-color: var(--color-surface-lowest);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: var(--stack-lg) var(--stack-md);
  transition: left 0.3s ease;
}

.drawer.open .drawer-content {
  left: 0;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--stack-lg);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--stack-md);
}

.drawer-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-navy);
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--stack-md);
}

.drawer-link {
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 16px;
  border-radius: var(--radius-default);
  color: var(--color-text-navy);
}

.drawer-link:hover, .drawer-link.active {
  background-color: var(--color-surface-low);
  color: var(--color-primary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-default);
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  outline: none;
}

.btn-primary {
  background-color: var(--color-primary-container);
  color: var(--color-surface-lowest);
}

.btn-primary:hover {
  background-color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-surface-lowest);
}

.btn-secondary:hover {
  background-color: #0b1528;
  transform: translateY(-1px);
}

.btn-tertiary {
  background-color: transparent;
  border: 1px solid var(--color-secondary);
  color: var(--color-secondary);
}

.btn-tertiary:hover {
  background-color: var(--color-surface-low);
  transform: translateY(-1px);
}

.btn:active {
  transform: scale(0.98);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 530px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--color-secondary);
  padding: 80px 0;
}

.hero-sm {
  min-height: 380px;
  padding: 60px 0;
}

.hero-md {
  min-height: 420px;
  padding: 70px 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(27, 42, 74, 0.8) 0%, rgba(27, 42, 74, 0.4) 100%);
  z-index: 1;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--color-surface-lowest);
  max-width: 650px;
  border-left: 4px solid var(--color-primary-container);
  padding-left: 32px;
}

.hero-tag {
  color: var(--color-primary-container);
  margin-bottom: var(--stack-sm);
  display: block;
}

.hero-title {
  color: var(--color-surface-lowest);
  margin-bottom: var(--stack-md);
}

.hero-desc {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--stack-lg);
}

/* --- Stats & Certification Strip --- */
.cert-strip {
  background-color: var(--color-surface-low);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0;
}

.cert-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--stack-lg);
}

.cert-logos {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0.7;
  transition: all 0.3s ease;
}

.cert-logos:hover {
  opacity: 1;
}

.cert-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.cert-stats {
  display: flex;
  gap: var(--stack-lg);
  flex-wrap: wrap;
}

.stat-item {
  border-left: 2px solid var(--color-primary);
  padding-left: 16px;
}

.stat-num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-container);
  display: block;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-slate);
}

/* --- Cards (Product & Features) --- */
.card-product {
  background-color: var(--color-surface-lowest);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.card-product:hover {
  border-color: var(--color-primary-container);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px -10px rgba(27, 42, 74, 0.1);
}

.card-img-wrapper {
  aspect-ratio: 4 / 3;
  width: 100%;
  background-color: var(--color-surface-low);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card-product:hover .card-img {
  transform: scale(1.05);
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-title {
  margin-bottom: var(--stack-sm);
  color: var(--color-text-navy);
}

.card-desc {
  margin-bottom: var(--stack-md);
  flex-grow: 1;
}

.card-link {
  color: var(--color-primary-container);
  font-weight: 700;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.card-link::after {
  content: '→';
  transition: transform 0.2s ease;
}

.card-product:hover .card-link::after {
  transform: translateX(4px);
}

/* Horizontal Cards (Desktop Row, Mobile Column) */
.card-horizontal {
  flex-direction: row;
  align-items: stretch;
  min-height: 250px;
}

.card-horizontal .card-img-wrapper {
  width: 40%;
  aspect-ratio: auto;
  border-bottom: none;
  border-right: 1px solid var(--color-border);
}

.card-horizontal .card-body {
  width: 60%;
}

@media (max-width: 768px) {
  .card-horizontal {
    flex-direction: column !important;
    min-height: auto;
  }
  .card-horizontal .card-img-wrapper {
    width: 100% !important;
    aspect-ratio: 4 / 3;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  .card-horizontal .card-body {
    width: 100% !important;
  }
}

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}

.feature-box {
  background-color: var(--color-surface-lowest);
  border: 1px solid var(--color-border);
  padding: 32px;
  border-radius: var(--radius-default);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.3s ease;
}

.feature-box:hover {
  border-color: var(--color-secondary-light);
  box-shadow: 0 4px 12px rgba(27, 42, 74, 0.05);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background-color: rgba(227, 39, 38, 0.1);
  color: var(--color-primary-container);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

/* --- Industrial Tables --- */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  margin-top: var(--stack-md);
  margin-bottom: var(--stack-lg);
}

.table-industrial {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.table-industrial th {
  background-color: var(--color-secondary);
  color: var(--color-surface-lowest);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  padding: 16px 24px;
}

.table-industrial td {
  padding: 16px 24px;
  font-size: 0.9375rem;
  color: var(--color-text-slate);
  border-bottom: 1px solid var(--color-border);
}

.table-industrial tr:nth-child(even) td {
  background-color: var(--color-surface-low);
}

.table-industrial tr:last-child td {
  border-bottom: none;
}

.table-industrial .text-right {
  text-align: right;
}

/* --- Forms & Inputs --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--stack-md);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text-slate);
}

.form-control {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-default);
  background-color: var(--color-surface-lowest);
  font-size: 0.9375rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}

.form-control:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(27, 42, 74, 0.1);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

/* --- Footer --- */
footer {
  background-color: var(--color-secondary);
  color: var(--color-surface-low);
  border-top: 4px solid var(--color-primary-container);
  padding: var(--section-padding) 0 40px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: var(--stack-lg);
}

.footer-col h3, .footer-col h4 {
  color: var(--color-surface-lowest);
  margin-bottom: var(--stack-md);
}

.footer-col p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--stack-md);
  font-size: 0.9375rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9375rem;
}

.footer-links a:hover {
  color: var(--color-primary-container);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

/* --- Interactive Timeline --- */
.timeline {
  position: relative;
  padding: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: calc(100% - 80px);
  background-color: var(--color-border);
  top: 40px;
}

.timeline-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-bottom: 80px;
  position: relative;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-badge {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  background-color: var(--color-primary-container);
  color: var(--color-surface-lowest);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  border: 4px solid var(--color-background);
  z-index: 10;
}

.timeline-panel {
  width: 45%;
  background-color: var(--color-surface-lowest);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.timeline-item:hover .timeline-panel {
  border-color: var(--color-primary-container);
}

.timeline-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.timeline-body {
  padding: 24px;
}

.timeline-title {
  color: var(--color-text-navy);
  margin-bottom: var(--stack-sm);
}

.timeline-spacer {
  width: 45%;
}

/* --- Tabs & Filters --- */
.tabs-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--stack-sm);
  margin-bottom: var(--stack-lg);
  padding: 0 8px;
}

.tab-btn {
  background: none;
  border: 1px solid var(--color-border);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tab-btn:hover {
  background-color: var(--color-surface-low);
  border-color: var(--color-secondary-light);
}

.tab-btn.active {
  background-color: var(--color-secondary);
  color: var(--color-surface-lowest);
  border-color: var(--color-secondary);
}

/* --- Modals --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.open {
  visibility: visible;
  opacity: 1;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(27, 42, 74, 0.6);
}

.modal-content {
  position: relative;
  z-index: 1001;
  background-color: var(--color-surface-lowest);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  padding: 32px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15);
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal.open .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--stack-md);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-navy);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-slate);
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* --- FAQ Accordion --- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--stack-md);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-default);
  background-color: var(--color-surface-lowest);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-text-navy);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.25rem;
  font-weight: 300;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-item.active .faq-answer {
  max-height: 200px;
}

.faq-answer-content {
  padding: 0 24px 20px 24px;
  color: var(--color-text-slate);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* --- Utilities --- */
.text-center { text-align: center; }
.w-full { width: 100%; }
.m-auto { margin: 0 auto; }
.text-primary { color: var(--color-primary-container); }
.text-navy { color: var(--color-text-navy); }
.bg-light { background-color: var(--color-surface-low); }
.bg-lowest { background-color: var(--color-surface-lowest); }
.bg-dark { background-color: var(--color-secondary); color: var(--color-surface-lowest); }

/* --- Refactored Responsive Blocks & Utility Classes --- */
.section-header {
  max-width: 600px;
  margin: 0 auto 56px auto;
  text-align: center;
}
@media (max-width: 768px) {
  .section-header {
    margin-bottom: 32px;
  }
}

.cta-card {
  background-color: var(--color-surface-lowest);
  border: 4px solid var(--color-primary-container);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(27, 42, 74, 0.05);
}
@media (max-width: 768px) {
  .cta-card {
    padding: 40px 20px;
  }
  .cta-card h2 {
    font-size: clamp(1.8rem, 5vw, 2.5rem) !important;
  }
}

.strategic-vision-box {
  background-color: var(--color-surface-low);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
}
@media (max-width: 768px) {
  .strategic-vision-box {
    padding: 24px;
  }
}

.contact-form-box {
  background-color: var(--color-surface-low);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 4px 20px rgba(27, 42, 74, 0.02);
}
@media (max-width: 768px) {
  .contact-form-box {
    padding: 24px 16px;
  }
}

.process-info-box {
  background-color: var(--color-surface-low);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: var(--stack-lg);
}
@media (max-width: 768px) {
  .process-info-box {
    padding: 24px;
  }
}

.border-top-bottom {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cert-logos span {
  color: var(--color-secondary);
  opacity: 0.9;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: var(--color-surface-container);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
  white-space: nowrap;
}
.cert-logos span:first-of-type {
  border-left: none;
}

/* --- Responsive Adjustments --- */
@media (max-width: 1024px) {
  :root {
    --margin-desktop: 32px;
  }
  
  .nav-menu {
    display: none;
  }
  
  .menu-toggle {
    display: inline-flex;
  }
  
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-12 {
    grid-template-columns: 1fr;
  }
  .grid-12 > * {
    grid-column: 1 / -1 !important;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .card-horizontal {
    flex-direction: column !important;
    min-height: auto;
  }
  
  .card-horizontal .card-img-wrapper {
    width: 100% !important;
    aspect-ratio: 4 / 3;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  
  .card-horizontal .card-body {
    width: 100% !important;
  }
  
  /* Timeline Responsive Collapse at 1024px */
  .timeline::before {
    left: 20px;
    transform: none;
  }
  
  .timeline-item {
    flex-direction: column !important;
    align-items: flex-start;
    margin-bottom: 40px;
  }
  
  .timeline-badge {
    left: 20px;
    transform: translateX(-50%);
  }
  
  .timeline-panel {
    width: calc(100% - 40px);
    margin-left: 40px;
  }
  
  .timeline-spacer {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
    --gutter: 16px;
  }
  
  .container {
    padding-left: var(--margin-mobile);
    padding-right: var(--margin-mobile);
  }
  
  .grid-2, .grid-3, .grid-4, .grid-12 {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .cert-container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--stack-lg);
  }
  
  .cert-logos {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    width: 100%;
  }
  
  .cert-logos span {
    border-left: none !important;
    padding-left: 0 !important;
    font-size: 0.8125rem;
    background-color: var(--color-surface-container);
    padding: 6px 12px !important;
    border-radius: var(--radius-sm);
    text-align: center;
  }

  .cert-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--stack-md);
    width: 100%;
  }
  
  .stat-item {
    border-left: none !important;
    border-top: 2px solid var(--color-primary);
    padding-left: 0 !important;
    padding-top: 8px;
    text-align: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--stack-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  body {
    padding-top: 64px;
  }
  .logo-img {
    height: 38px;
  }
  .nav-container {
    height: 64px;
  }
  .cert-stats {
    grid-template-columns: 1fr;
    gap: var(--stack-md);
    width: 100%;
  }
  .stat-item {
    border-top: none !important;
    border-left: 2px solid var(--color-primary) !important;
    padding-left: 12px !important;
    padding-top: 0 !important;
    text-align: left;
    max-width: 200px;
    margin: 0 auto;
  }
  .table-industrial th, .table-industrial td {
    padding: 10px 12px !important;
    font-size: 0.8125rem;
  }
}

@media (max-width: 360px) {
  .logo-img {
    height: 32px;
  }
}

/* --- Chic Preloader --- */
#preloader {
  position: fixed;
  inset: 0;
  background-color: #121c32; /* Deep Navy from brand */
  z-index: 99999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: opacity 0.6s cubic-bezier(0.25, 1, 0.5, 1), visibility 0.6s;
}

#preloader.fade-out {
  opacity: 0;
  visibility: hidden;
}

.preloader-spinner-wrapper {
  position: relative;
  width: 80px;
  height: 80px;
  margin-bottom: 24px;
}

.preloader-outer-ring {
  position: absolute;
  inset: 0;
  border: 3px solid rgba(227, 39, 38, 0.1);
  border-top-color: #e32726; /* Brand red */
  border-radius: 50%;
  animation: preloader-spin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.preloader-inner-ring {
  position: absolute;
  inset: 12px;
  border: 3px solid rgba(255, 255, 255, 0.05);
  border-bottom-color: #ffffff;
  border-radius: 50%;
  animation: preloader-spin-reverse 1.8s linear infinite;
}

.preloader-logo {
  position: absolute;
  inset: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #ffffff;
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.05em;
  animation: preloader-pulse 2s ease-in-out infinite;
}

.preloader-text {
  color: rgba(255, 255, 255, 0.7);
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: preloader-fade-text 1.5s ease-in-out infinite alternate;
}

@keyframes preloader-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes preloader-spin-reverse {
  0% { transform: rotate(360deg); }
  100% { transform: rotate(0deg); }
}

@keyframes preloader-pulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; text-shadow: 0 0 10px rgba(227, 39, 38, 0.5); }
}

@keyframes preloader-fade-text {
  0% { opacity: 0.4; }
  100% { opacity: 0.9; }
}

/* --- Fade-In / Reveal Scroll Entrance Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }