/* ==========================================================================
   IGPL Design System v2
   Premium industrial corporate website
   ========================================================================== */

/* ---- CSS Custom Properties (Design Tokens) ---- */
:root {
  /* Primary */
  --igpl-primary: #007C66;
  --igpl-primary-dark: #005E4D;
  --igpl-primary-light: #00A88A;
  --igpl-primary-gradient: linear-gradient(135deg, #007C66 0%, #00A88A 100%);

  /* Secondary / Neutral */
  --igpl-secondary: #1E293B;
  --igpl-accent: #0F172A;
  --igpl-navy: #0F2B4F;

  /* Surfaces */
  --igpl-surface-warm: #F8FAFB;
  --igpl-surface-card: rgba(255,255,255,0.7);
  --igpl-surface-frosted: rgba(0,124,102,0.06);

  /* Text */
  --igpl-text-primary: #0F172A;
  --igpl-text-secondary: #475569;
  --igpl-text-muted: #94A3B8;
  --igpl-text-on-dark: #F1F5F9;

  /* Borders */
  --igpl-border: #E2E8F0;
  --igpl-border-light: #F1F5F9;

  /* Typography */
  --igpl-font-display: 'Inter', 'Montserrat', system-ui, -apple-system, sans-serif;
  --igpl-font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --igpl-font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

  /* Font sizes */
  --igpl-fs-hero: clamp(2.5rem, 5vw, 4.5rem);
  --igpl-fs-section: clamp(1.75rem, 3vw, 2.5rem);
  --igpl-fs-card: 1.125rem;
  --igpl-fs-body: 1rem;
  --igpl-fs-small: 0.875rem;
  --igpl-fs-xs: 0.75rem;

  /* Spacing */
  --igpl-space-xs: 0.5rem;
  --igpl-space-sm: 0.75rem;
  --igpl-space-md: 1rem;
  --igpl-space-lg: 1.5rem;
  --igpl-space-xl: 2rem;
  --igpl-space-2xl: 3rem;
  --igpl-space-3xl: 4rem;
  --igpl-space-4xl: 5rem;
  --igpl-space-section: clamp(4rem, 8vw, 6rem);

  /* Radius */
  --igpl-radius-sm: 6px;
  --igpl-radius-md: 12px;
  --igpl-radius-lg: 16px;
  --igpl-radius-xl: 24px;
  --igpl-radius-full: 9999px;

  /* Shadows */
  --igpl-shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --igpl-shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --igpl-shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
  --igpl-shadow-teal: 0 8px 30px rgba(0,124,102,0.15);

  /* Transitions */
  --igpl-transition-fast: 0.2s ease;
  --igpl-transition-normal: 0.3s ease;
  --igpl-transition-slow: 0.5s ease;

  /* Container */
  --igpl-container: 1280px;
  --igpl-container-narrow: 960px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--igpl-font-body);
  font-size: var(--igpl-fs-body);
  font-weight: 400;
  line-height: 1.65;
  color: var(--igpl-text-primary);
  background: #ffffff;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--igpl-font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--igpl-text-primary);
}

h1 { font-size: var(--igpl-fs-hero); }
h2 { font-size: var(--igpl-fs-section); }
h3 { font-size: var(--igpl-fs-card); }

p {
  max-width: 65ch;
  color: var(--igpl-text-secondary);
}

a {
  color: var(--igpl-primary);
  text-decoration: none;
  transition: color var(--igpl-transition-fast);
}

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

/* ---- Layout ---- */
.igpl-container {
  width: 100%;
  max-width: var(--igpl-container);
  margin: 0 auto;
  padding: 0 var(--igpl-space-xl);
}

.igpl-container--narrow {
  max-width: var(--igpl-container-narrow);
}

.igpl-section {
  padding: var(--igpl-space-section) 0;
  position: relative;
  overflow: hidden;
}

/* ---- Eyebrow / Label ---- */
.igpl-eyebrow {
  display: inline-block;
  font-family: var(--igpl-font-body);
  font-weight: 600;
  font-size: var(--igpl-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--igpl-primary);
  margin-bottom: var(--igpl-space-sm);
}

.igpl-eyebrow--light {
  color: var(--igpl-primary-light);
}

/* ---- Section Divider ---- */
.igpl-divider {
  width: 4rem;
  height: 3px;
  background: var(--igpl-primary);
  border-radius: var(--igpl-radius-full);
  margin: var(--igpl-space-md) 0 var(--igpl-space-xl);
}

.igpl-divider--center {
  margin-left: auto;
  margin-right: auto;
}

/* ---- Surfaces ---- */
.igpl-surface-warm {
  background: var(--igpl-surface-warm);
}

.igpl-surface-dark {
  background: var(--igpl-secondary);
  color: var(--igpl-text-on-dark);
}

.igpl-surface-dark h2,
.igpl-surface-dark h3 {
  color: #ffffff;
}

.igpl-surface-dark p {
  color: #94A3B8;
}

.igpl-surface-teal-gradient {
  background: var(--igpl-primary-gradient);
  color: #ffffff;
}

.igpl-surface-teal-gradient p {
  color: rgba(255,255,255,0.9);
}

/* ---- Frosted Glass ---- */
.igpl-frosted {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--igpl-radius-md);
}

.igpl-frosted--dark {
  background: rgba(15,23,42,0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--igpl-radius-md);
}

/* ---- Bento Grid ---- */
.igpl-bento {
  display: grid;
  gap: var(--igpl-space-lg);
}

.igpl-bento--1x3 {
  grid-template-columns: 1fr 1fr 1fr;
}

.igpl-bento--1large-3small {
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
}

.igpl-bento--1large-3small > :first-child {
  grid-row: span 2;
}

.igpl-bento--2x2 {
  grid-template-columns: 1fr 1fr;
}

.igpl-bento--2x3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
  .igpl-bento--1x3,
  .igpl-bento--1large-3small,
  .igpl-bento--2x2,
  .igpl-bento--2x3 {
    grid-template-columns: 1fr;
  }
  .igpl-bento--1large-3small > :first-child {
    grid-row: span 1;
  }
}

/* ---- Cards ---- */
.igpl-card {
  background: #ffffff;
  border: 1px solid var(--igpl-border);
  border-radius: var(--igpl-radius-md);
  padding: var(--igpl-space-xl);
  transition: transform var(--igpl-transition-normal), box-shadow var(--igpl-transition-normal);
}

.igpl-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--igpl-shadow-lg);
}

.igpl-card--dark {
  background: var(--igpl-secondary);
  border-color: transparent;
  color: var(--igpl-text-on-dark);
}

.igpl-card--dark h3 {
  color: #ffffff;
}

.igpl-card--dark p {
  color: #94A3B8;
}

.igpl-card--teal {
  background: var(--igpl-primary);
  border-color: var(--igpl-primary-dark);
  color: #ffffff;
}

.igpl-card--teal h3 {
  color: #ffffff;
}

.igpl-card--teal p {
  color: #A7F3D0;
}

.igpl-card--frosted {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.3);
}

/* ---- Buttons ---- */
.igpl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--igpl-font-display);
  font-weight: 700;
  font-size: var(--igpl-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.75rem 1.5rem;
  border-radius: var(--igpl-radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--igpl-transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.igpl-btn--primary {
  background: var(--igpl-primary);
  color: #ffffff;
  border-color: var(--igpl-primary);
}

.igpl-btn--primary:hover {
  background: var(--igpl-primary-dark);
  border-color: var(--igpl-primary-dark);
  box-shadow: var(--igpl-shadow-teal);
  color: #ffffff;
}

.igpl-btn--secondary {
  background: transparent;
  color: var(--igpl-primary);
  border-color: var(--igpl-primary);
}

.igpl-btn--secondary:hover {
  background: var(--igpl-primary);
  color: #ffffff;
}

.igpl-btn--white {
  background: #ffffff;
  color: var(--igpl-primary);
  border-color: #ffffff;
}

.igpl-btn--white:hover {
  background: var(--igpl-surface-warm);
  color: var(--igpl-primary);
}

.igpl-btn--outline-white {
  background: transparent;
  color: #ffffff;
  border-color: rgba(255,255,255,0.7);
}

.igpl-btn--outline-white:hover {
  background: #ffffff;
  color: var(--igpl-secondary);
}

.igpl-btn--ghost {
  background: transparent;
  color: var(--igpl-primary);
  border-color: transparent;
  padding: 0.5rem 0;
}

.igpl-btn--ghost:hover {
  text-decoration: underline;
}

/* ---- Split Layout ---- */
.igpl-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--igpl-space-3xl);
  align-items: center;
}

@media (max-width: 768px) {
  .igpl-split {
    grid-template-columns: 1fr;
    gap: var(--igpl-space-xl);
  }
}

/* ---- Icon Wrapper ---- */
.igpl-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--igpl-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.igpl-icon--teal {
  background: rgba(0,124,102,0.1);
}

.igpl-icon--teal svg {
  color: var(--igpl-primary);
}

.igpl-icon--white {
  background: rgba(255,255,255,0.15);
}

.igpl-icon--white svg {
  color: #ffffff;
}

/* ---- Tag / Pill ---- */
.igpl-tag {
  display: inline-block;
  font-family: var(--igpl-font-body);
  font-weight: 600;
  font-size: var(--igpl-fs-xs);
  padding: 0.25rem 0.75rem;
  border-radius: var(--igpl-radius-full);
}

.igpl-tag--teal {
  background: rgba(0,124,102,0.1);
  color: var(--igpl-primary);
}

.igpl-tag--white {
  background: rgba(255,255,255,0.15);
  color: #ffffff;
}

/* ---- Stat Counter ---- */
.igpl-stat {
  text-align: center;
}

.igpl-stat__value {
  font-family: var(--igpl-font-display);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.igpl-stat__label {
  font-family: var(--igpl-font-body);
  font-weight: 400;
  font-size: var(--igpl-fs-small);
  color: var(--igpl-text-secondary);
  margin-top: var(--igpl-space-xs);
}

.igpl-stat__bar {
  width: 2rem;
  height: 2px;
  margin: var(--igpl-space-xs) auto;
}

/* ---- Value Chain ---- */
.igpl-value-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  padding: var(--igpl-space-xl) 0;
}

.igpl-value-chain__node {
  background: var(--igpl-primary);
  border-radius: var(--igpl-radius-md);
  padding: var(--igpl-space-md) var(--igpl-space-xl);
  text-align: center;
  min-width: 140px;
  position: relative;
  transition: transform var(--igpl-transition-normal), box-shadow var(--igpl-transition-normal);
  cursor: default;
}

.igpl-value-chain__node:hover {
  transform: scale(1.05);
  box-shadow: var(--igpl-shadow-teal);
}

.igpl-value-chain__node--highlight {
  background: var(--igpl-secondary);
  min-width: 180px;
}

.igpl-value-chain__node--branch {
  background: rgba(0,124,102,0.15);
  border: 1px dashed var(--igpl-primary);
}

.igpl-value-chain__node h4 {
  font-size: var(--igpl-fs-small);
  font-weight: 700;
  color: #ffffff;
}

.igpl-value-chain__node--branch h4 {
  color: var(--igpl-primary);
}

.igpl-value-chain__node p {
  font-size: var(--igpl-fs-xs);
  color: rgba(255,255,255,0.7);
  margin-top: 0.25rem;
}

.igpl-value-chain__node--branch p {
  color: var(--igpl-text-secondary);
}

.igpl-value-chain__arrow {
  width: 2.5rem;
  height: 1.25rem;
  flex-shrink: 0;
  color: var(--igpl-primary);
}

.igpl-value-chain__branches {
  display: flex;
  gap: var(--igpl-space-sm);
  margin-left: var(--igpl-space-xl);
  position: relative;
}

.igpl-value-chain__branches::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--igpl-space-xl) + 2px);
  top: 50%;
  width: var(--igpl-space-xl);
  height: 2px;
  background: var(--igpl-primary);
  opacity: 0.3;
}

@media (max-width: 768px) {
  .igpl-value-chain {
    flex-direction: column;
    gap: var(--igpl-space-md);
  }
  .igpl-value-chain__arrow {
    transform: rotate(90deg);
  }
  .igpl-value-chain__branches {
    margin-left: 0;
    flex-wrap: wrap;
  }
  .igpl-value-chain__branches::before {
    display: none;
  }
}

/* ---- FAQ Accordion ---- */
.igpl-accordion {
  border: 1px solid var(--igpl-border);
  border-radius: var(--igpl-radius-md);
  overflow: hidden;
}

.igpl-accordion__item {
  border-bottom: 1px solid var(--igpl-border);
}

.igpl-accordion__item:last-child {
  border-bottom: none;
}

.igpl-accordion__trigger {
  width: 100%;
  padding: var(--igpl-space-lg) var(--igpl-space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--igpl-font-display);
  font-weight: 600;
  font-size: var(--igpl-fs-body);
  color: var(--igpl-text-primary);
  text-align: left;
  transition: background var(--igpl-transition-fast);
}

.igpl-accordion__trigger:hover {
  background: var(--igpl-surface-warm);
}

.igpl-accordion__trigger svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  transition: transform var(--igpl-transition-normal);
  color: var(--igpl-text-muted);
}

.igpl-accordion__item[open] .igpl-accordion__trigger svg {
  transform: rotate(180deg);
}

.igpl-accordion__content {
  padding: 0 var(--igpl-space-xl) var(--igpl-space-lg);
  color: var(--igpl-text-secondary);
  font-size: var(--igpl-fs-small);
  line-height: 1.7;
}

/* ---- Spec Table ---- */
.igpl-spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--igpl-fs-small);
}

.igpl-spec-table th,
.igpl-spec-table td {
  padding: var(--igpl-space-md) var(--igpl-space-lg);
  text-align: left;
  border-bottom: 1px solid var(--igpl-border);
}

.igpl-spec-table th {
  font-weight: 600;
  color: var(--igpl-text-primary);
  background: var(--igpl-surface-warm);
}

.igpl-spec-table td:first-child {
  font-weight: 500;
  color: var(--igpl-text-secondary);
}

.igpl-spec-table td:last-child {
  font-weight: 600;
  color: var(--igpl-text-primary);
  font-variant-numeric: tabular-nums;
}

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

/* ---- Product Card ---- */
.igpl-product-card {
  background: #ffffff;
  border: 1px solid var(--igpl-border);
  border-radius: var(--igpl-radius-md);
  overflow: hidden;
  transition: transform var(--igpl-transition-normal), box-shadow var(--igpl-transition-normal);
}

.igpl-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--igpl-shadow-lg);
}

.igpl-product-card__image {
  height: 8rem;
  overflow: hidden;
}

.igpl-product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--igpl-transition-slow);
}

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

.igpl-product-card__header {
  padding: var(--igpl-space-md) var(--igpl-space-lg);
  background: var(--igpl-primary);
}

.igpl-product-card__header h4 {
  font-size: var(--igpl-fs-card);
  font-weight: 800;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.igpl-product-card__header p {
  font-size: var(--igpl-fs-xs);
  color: rgba(255,255,255,0.8);
  margin-top: 0.25rem;
}

.igpl-product-card__body {
  padding: var(--igpl-space-lg);
}

.igpl-product-card__spec {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.375rem 0;
}

.igpl-product-card__spec-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--igpl-primary);
  flex-shrink: 0;
}

.igpl-product-card__spec-label {
  font-size: var(--igpl-fs-small);
  color: var(--igpl-text-muted);
}

.igpl-product-card__spec-value {
  font-family: var(--igpl-font-display);
  font-weight: 600;
  font-size: var(--igpl-fs-small);
  color: var(--igpl-text-primary);
  margin-left: auto;
}

/* ---- Scroll Reveal Animations ---- */
.igpl-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--igpl-transition-slow), transform var(--igpl-transition-slow);
}

.igpl-reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

.igpl-reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--igpl-transition-slow), transform var(--igpl-transition-slow);
}

.igpl-reveal-left.igpl-reveal--visible {
  opacity: 1;
  transform: translateX(0);
}

.igpl-reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--igpl-transition-slow), transform var(--igpl-transition-slow);
}

.igpl-reveal-right.igpl-reveal--visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger children */
.igpl-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.igpl-stagger.igpl-reveal--visible > *:nth-child(1) { transition-delay: 0s; }
.igpl-stagger.igpl-reveal--visible > *:nth-child(2) { transition-delay: 0.1s; }
.igpl-stagger.igpl-reveal--visible > *:nth-child(3) { transition-delay: 0.2s; }
.igpl-stagger.igpl-reveal--visible > *:nth-child(4) { transition-delay: 0.3s; }
.igpl-stagger.igpl-reveal--visible > *:nth-child(5) { transition-delay: 0.35s; }
.igpl-stagger.igpl-reveal--visible > *:nth-child(6) { transition-delay: 0.4s; }

.igpl-stagger.igpl-reveal--visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Navigation ---- */
.igpl-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background var(--igpl-transition-normal), box-shadow var(--igpl-transition-normal), border-color var(--igpl-transition-normal);
}

.igpl-nav--transparent {
  background: transparent;
  border-bottom: none;
}

.igpl-nav--solid {
  background: #ffffff;
  border-bottom: 1px solid var(--igpl-border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.igpl-nav__link {
  font-family: var(--igpl-font-display);
  font-weight: 700;
  font-size: var(--igpl-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--igpl-text-secondary);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--igpl-transition-fast);
}

.igpl-nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--igpl-primary);
  transition: width var(--igpl-transition-fast);
}

.igpl-nav__link:hover {
  color: var(--igpl-primary);
}

.igpl-nav__link:hover::after {
  width: 100%;
}

.igpl-nav--transparent .igpl-nav__link {
  color: rgba(255,255,255,0.85);
}

.igpl-nav--transparent .igpl-nav__link:hover {
  color: #ffffff;
}

.igpl-nav--transparent .igpl-nav__link::after {
  background: #ffffff;
}

/* ---- Footer ---- */
.igpl-footer {
  background: var(--igpl-secondary);
  color: var(--igpl-text-on-dark);
}

.igpl-footer a {
  color: #94A3B8;
  transition: color var(--igpl-transition-fast);
}

.igpl-footer a:hover {
  color: #ffffff;
}

/* ---- CTA Band ---- */
.igpl-cta-band {
  background: var(--igpl-primary-gradient);
  color: #ffffff;
  text-align: center;
}

.igpl-cta-band h2 {
  color: #ffffff;
}

.igpl-cta-band p {
  color: rgba(255,255,255,0.9);
  margin: 0 auto var(--igpl-space-xl);
}

/* ---- Page Hero ---- */
.igpl-page-hero {
  background: var(--igpl-secondary);
  color: var(--igpl-text-on-dark);
  padding: var(--igpl-space-4xl) 0 var(--igpl-space-3xl);
  position: relative;
  overflow: hidden;
}

.igpl-page-hero h1 {
  color: #ffffff;
}

.igpl-page-hero p {
  color: #94A3B8;
}

.igpl-page-hero--small {
  padding: var(--igpl-space-3xl) 0 var(--igpl-space-2xl);
}

/* ---- Utility ---- */
.igpl-text-center { text-align: center; }
.igpl-text-white { color: #ffffff; }
.igpl-text-teal { color: var(--igpl-primary); }
.igpl-bg-white { background: #ffffff; }
.igpl-mt-sm { margin-top: var(--igpl-space-sm); }
.igpl-mt-md { margin-top: var(--igpl-space-md); }
.igpl-mt-lg { margin-top: var(--igpl-space-lg); }
.igpl-mt-xl { margin-top: var(--igpl-space-xl); }
.igpl-mb-md { margin-bottom: var(--igpl-space-md); }
.igpl-mb-lg { margin-bottom: var(--igpl-space-lg); }
.igpl-mb-xl { margin-bottom: var(--igpl-space-xl); }

/* Tabular numerals for stats */
.igpl-tabular {
  font-variant-numeric: tabular-nums;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  :root {
    --igpl-space-section: 4rem;
  }
}

@media (max-width: 768px) {
  :root {
    --igpl-space-section: 3rem;
  }

  .igpl-container {
    padding: 0 var(--igpl-space-md);
  }

  .igpl-split {
    grid-template-columns: 1fr;
  }
}