/* EMTAT LTD: Circular Environmental Technology - Official Stylesheet */
:root {
  --color-canvas: #FAF9F5;
  --color-surface: #FFFFFF;
  --color-surface-subtle: #F4EFE6;
  --color-dark: #101F1C;
  --color-dark-surface: #182B27;
  --color-emerald-deep: #0B3D35;
  --color-emerald-hover: #134E44;
  --color-emerald-light: #6EE7B7;
  --color-emerald-tint: #ECFDF5;
  --color-gold: #C59B27;
  --color-gold-light: #FBF4E2;
  --color-text-main: #1A202C;
  --color-text-muted: #57606A;
  --color-text-light: #8C959F;
  --color-border: #E2DDD5;
  --color-border-subtle: #EDE8DE;
  
  --font-serif: 'Playfair Display', Georgia, Cambria, 'Times New Roman', Times, serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, Monaco, monospace;

  --container-max: 1240px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--color-canvas);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Typography Hierarchy */
h1, h2, h3, h4, .font-serif {
  font-family: var(--font-serif);
  color: var(--color-text-main);
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 600;
}

p {
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.7;
}

.kicker {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-emerald-deep);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.kicker::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-emerald-deep);
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

/* Layout Containers */
.container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Header & Top Bar Navigation (Strict 3-zone contract) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(250, 249, 245, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: all 0.2s ease;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
}

/* Zone 1: Brand Wordmark with Logo */
.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background-color: var(--color-emerald-deep);
  padding: 2px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(197, 155, 39, 0.4);
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
}

/* Zone 2: Navigation Links (Text with hover underlines) */
.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.5rem 0;
  position: relative;
  transition: color 0.15s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-emerald-deep);
}

.nav-link.active {
  color: var(--color-emerald-deep);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-emerald-deep);
  border-radius: 2px;
}

/* Zone 3: Primary Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-emerald-deep);
  color: #FFFFFF !important;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-emerald-hover);
}

.btn-outline {
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text-main);
}

.btn-outline:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-text-muted);
}

.btn-whatsapp {
  background-color: #25D366;
  color: #FFFFFF !important;
}

.btn-whatsapp:hover {
  background-color: #20BA5A;
}

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--color-text-main);
  padding: 0.5rem;
}

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  flex-direction: column;
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem 1.5rem;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav .nav-link {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0 4rem;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, rgba(244, 239, 230, 0.6) 0%, rgba(250, 249, 245, 1) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.metadata-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-weight: 500;
  padding-top: 0.5rem;
}

.metadata-row span:not(.separator) {
  color: var(--color-text-muted);
}

.separator {
  color: var(--color-border);
}

/* Visual Frame / Media Cards */
.media-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-md);
}

.media-card img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.media-caption {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
}

.media-caption-title {
  font-family: var(--font-serif);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.25rem;
}

.media-caption-desc {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Sections & Bento Grids */
.section {
  padding: 4.5rem 0;
}

.section-alt {
  background-color: var(--color-surface-subtle);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-dark {
  background-color: var(--color-dark);
  color: #E2E8F0;
  border-top: 1px solid #1E293B;
  border-bottom: 1px solid #1E293B;
}

.section-dark h2, .section-dark h3, .section-dark h4 {
  color: #FFFFFF;
}

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

.section-header {
  max-width: 780px;
  margin-bottom: 3rem;
}

.section-header p {
  margin-top: 0.75rem;
  font-size: 1.0625rem;
}

/* Product Portal Cards Grid */
.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.portal-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.portal-card:hover {
  border-color: var(--color-text-muted);
  box-shadow: var(--shadow-md);
}

.portal-img-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
  background-color: #EDE8DE;
}

.portal-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.portal-card:hover .portal-img-wrap img {
  transform: scale(1.03);
}

.portal-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background-color: var(--color-emerald-deep);
  color: #FFFFFF;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.portal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  justify-content: space-between;
  gap: 1.25rem;
}

.portal-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.portal-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-emerald-deep);
  text-decoration: none;
}

.link-arrow:hover {
  text-decoration: underline;
}

/* Feature 4-column Bento in Dark Section */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.pillar-box {
  background-color: rgba(24, 43, 39, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem;
  border-radius: var(--radius-md);
}

.pillar-box h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pillar-box p {
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* Data Tables & Spec Boxes */
.spec-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  margin-top: 1.5rem;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.8125rem;
}

.spec-table th, .spec-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.spec-table th {
  background-color: var(--color-surface-subtle);
  color: var(--color-text-main);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
}

.spec-table th.highlight-col, .spec-table td.highlight-col {
  background-color: rgba(110, 231, 183, 0.12);
  color: var(--color-emerald-deep);
  font-weight: 600;
}

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

/* Technical Innovation Box (User Requested Blank Box) */
.innovation-box {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin: 3rem 0;
}

.innovation-header {
  padding: 1.5rem 2rem;
  background-color: var(--color-surface-subtle);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.innovation-body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.note-item {
  display: flex;
  gap: 1rem;
  background-color: var(--color-canvas);
  border: 1px solid var(--color-border-subtle);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: var(--color-text-main);
}

.note-index {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  width: 20px;
  height: 20px;
  background-color: var(--color-emerald-deep);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

/* Contact / Inbound Grid */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 3rem;
  align-items: flex-start;
}

.contact-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.contact-row {
  display: flex;
  gap: 1rem;
  margin-top: 1.25rem;
  font-size: 0.875rem;
}

.contact-row-icon {
  color: var(--color-emerald-deep);
  flex-shrink: 0;
  font-size: 1.1rem;
  margin-top: 0.15rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.375rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-text-main);
  background-color: var(--color-surface);
  outline: none;
  transition: border-color 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-emerald-deep);
  box-shadow: 0 0 0 1px var(--color-emerald-deep);
}

/* Footer (Quiet corporate) */
.site-footer {
  background-color: var(--color-dark);
  color: #94A3B8;
  border-top: 1px solid #1E293B;
  padding: 4.5rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1.4fr;
  gap: 3rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #FFFFFF;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.8125rem;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.75rem;
  color: #64748B;
}

/* Floating WhatsApp Direct */
.floating-whatsapp {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 99;
  background-color: #25D366;
  color: #FFFFFF;
  padding: 0.75rem 1.25rem;
  border-radius: 9999px;
  font-size: 0.8125rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.floating-whatsapp:hover {
  transform: translateY(-2px);
}

/* Interactive Tabs */
.tab-btn-group {
  display: inline-flex;
  background-color: var(--color-border);
  padding: 3px;
  border-radius: var(--radius-sm);
  gap: 2px;
}

.tab-btn {
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: all 0.15s ease;
}

.tab-btn.active {
  background-color: var(--color-surface);
  color: var(--color-text-main);
  box-shadow: var(--shadow-sm);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid, .contact-grid, .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .site-nav, .header-actions {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
}

@media print {
  .site-header, .site-footer, .floating-whatsapp, .btn, .mobile-toggle {
    display: none !important;
  }
  body, html {
    background-color: #FFFFFF;
    color: #000000;
  }
  .container {
    max-width: 100%;
    padding: 0;
  }
}