/*
   GAT (QLD) PTY LTD
   Geotechnical Advisory & Engineering Assessment Portal
   Alexandra Headland, Queensland, Australia | ABN: 29 149 686 751 | Established 2011
*/

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --color-primary: #0B1E36;
  --color-primary-dark: #071322;
  --color-primary-light: #16365C;
  --color-accent: #C59B27;
  --color-accent-dark: #9A7718;
  --color-accent-light: #FAF4E5;
  --color-secondary: #2C4A6F;
  --color-surface: #FFFFFF;
  --color-bg: #F4F6F9;
  --color-bg-alt: #EBF0F5;
  --color-text: #1E293B;
  --color-text-muted: #52637A;
  --color-border: #D8E0EA;
  --color-border-dark: #B9C7D6;
  --color-success: #15803D;
  --color-success-bg: #DCFCE7;
  
  --font-serif: 'Cinzel', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --shadow-sm: 0 1px 3px rgba(11, 30, 54, 0.06), 0 1px 2px rgba(11, 30, 54, 0.04);
  --shadow-md: 0 4px 8px -1px rgba(11, 30, 54, 0.08), 0 2px 4px -2px rgba(11, 30, 54, 0.05);
  --shadow-lg: 0 12px 20px -4px rgba(11, 30, 54, 0.12), 0 4px 8px -4px rgba(11, 30, 54, 0.06);
  --shadow-xl: 0 20px 30px -6px rgba(11, 30, 54, 0.16), 0 8px 12px -6px rgba(11, 30, 54, 0.08);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --transition: all 0.25s cubic-bezier(0.25, 1, 0.5, 1);
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: 2.35rem; }
h2 { font-size: 1.85rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

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

a:hover {
  color: var(--color-accent-dark);
}

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

/* CONTAINER */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* TOP NOTIFICATION / ACCREDITATION BAR */
.top-bar {
  background: var(--color-primary-dark);
  color: #C1D0E0;
  font-size: 0.8125rem;
  border-bottom: 1px solid rgba(197, 155, 39, 0.2);
  padding: 0.5rem 0;
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.top-bar-info {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.top-bar-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.top-bar-item svg {
  width: 14px;
  height: 14px;
  fill: var(--color-accent);
}

.badge-corp {
  background: rgba(197, 155, 39, 0.15);
  color: #E6C875;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
  border: 1px solid rgba(197, 155, 39, 0.3);
}

/* HEADER & NAVBAR */
.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-svg {
  height: 48px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-primary);
  padding: 0.5rem 0;
  position: relative;
}

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

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  border: 1px solid var(--color-accent);
  transition: var(--transition);
}

.nav-cta:hover {
  background: var(--color-accent-dark);
  color: #FFFFFF;
  border-color: var(--color-accent-dark);
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-primary);
}

/* HERO SECTION */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-secondary) 100%);
  color: #FFFFFF;
  padding: 4.5rem 0 4rem;
  position: relative;
  overflow: hidden;
  border-bottom: 3px solid var(--color-accent);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 85% 20%, rgba(197, 155, 39, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(197, 155, 39, 0.4);
  color: #E8D196;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.35rem 0.85rem;
  border-radius: 40px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  color: #FFFFFF;
  font-size: 2.65rem;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  font-weight: 800;
}

.hero-lead {
  font-size: 1.125rem;
  color: #CBD8E6;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: #071322;
  border-color: var(--color-accent);
  font-weight: 700;
}

.btn-primary:hover {
  background: #E0B53D;
  color: #071322;
  box-shadow: 0 4px 12px rgba(197, 155, 39, 0.3);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  border-color: #FFFFFF;
}

.hero-trust-row {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.trust-item {
  display: flex;
  flex-direction: column;
}

.trust-item .num {
  font-size: 1.5rem;
  font-weight: 800;
  color: #E8D196;
  font-family: var(--font-mono);
}

.trust-item .lbl {
  font-size: 0.75rem;
  color: #A3B8CE;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* HERO CARD / INTERACTIVE SITE CALCULATOR PREVIEW */
.hero-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(197, 155, 39, 0.3);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-xl);
}

.card-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.card-header h3 {
  color: #FFFFFF;
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.card-header p {
  font-size: 0.8125rem;
  color: #A3B8CE;
}

/* SECTION BASICS */
.section {
  padding: 4.5rem 0;
}

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

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3rem;
}

.section-badge {
  display: inline-block;
  color: var(--color-accent-dark);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.5rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

/* GRID LAYOUTS */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* FEATURE / MONOGRAPH CARDS */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

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

.card-icon {
  width: 52px;
  height: 52px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
}

.card-icon svg {
  width: 26px;
  height: 26px;
}

.card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  flex-grow: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-top: 1.25rem;
}

.card-link:hover {
  color: var(--color-accent-dark);
}

/* INTERACTIVE SOIL CLASSIFICATION TOOL */
.calc-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-primary);
}

.form-select,
.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9375rem;
  background-color: #FFFFFF;
  color: var(--color-text);
  transition: var(--transition);
}

.form-select:focus,
.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(11, 30, 54, 0.1);
}

.calc-output {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calc-result-header {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.calc-class-badge {
  display: inline-block;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  border-left: 4px solid var(--color-accent);
}

.calc-details {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.6;
}

.calc-details ul {
  padding-left: 1.25rem;
  margin: 0.5rem 0;
}

/* TECHNICAL SPECIFICATION TABLE */
.spec-table-container {
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.spec-table th {
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 1rem 1.25rem;
  font-weight: 600;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-table th:last-child {
  border-right: none;
}

.spec-table td {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.spec-table tr:nth-child(even) td {
  background: var(--color-bg);
}

.spec-table tr:hover td {
  background: rgba(197, 155, 39, 0.05);
}

/* ACCORDION (FAQ) */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.accordion-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

.accordion-trigger {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
}

.accordion-trigger svg {
  width: 18px;
  height: 18px;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.accordion-item.active .accordion-trigger svg {
  transform: rotate(180deg);
}

.accordion-content {
  padding: 0 1.5rem 1.25rem;
  display: none;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  border-top: 1px solid var(--color-border);
  margin-top: -0.25rem;
  padding-top: 1rem;
}

.accordion-item.active .accordion-content {
  display: block;
}

/* CONTACT & LEGAL BOXES */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

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

.info-icon {
  width: 40px;
  height: 40px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.info-icon svg {
  width: 20px;
  height: 20px;
}

.info-text h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
  letter-spacing: 0.5px;
}

.info-text p, .info-text a {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* MAP EMBED */
.map-container {
  width: 100%;
  height: 340px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-top: 2rem;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* LEGAL / COMPLIANCE ARTICLE VIEW */
.legal-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
}

.legal-content h2 {
  margin: 2rem 0 1rem;
  font-size: 1.5rem;
  border-bottom: 2px solid var(--color-bg-alt);
  padding-bottom: 0.5rem;
}

.legal-content h3 {
  margin: 1.5rem 0 0.75rem;
  font-size: 1.2rem;
}

.legal-content ul, .legal-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.legal-content li {
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.legal-meta-box {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* FOOTER */
.footer {
  background: var(--color-primary-dark);
  color: #A3B8CE;
  padding: 4.5rem 0 2rem;
  margin-top: auto;
  border-top: 4px solid var(--color-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 0.9fr 1.1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.0625rem;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--color-accent);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-links a {
  color: #A3B8CE;
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-disclaimer-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: #8C9EAF;
  margin-bottom: 2rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8125rem;
}

.footer-bottom-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-bottom-links a {
  color: #8C9EAF;
}

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

/* FORM ALERTS */
.form-alert {
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  display: none;
  font-size: 0.875rem;
}

.form-alert-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(21, 128, 61, 0.3);
}

.form-alert-error {
  background: #FEE2E2;
  color: #B91C1C;
  border: 1px solid rgba(185, 28, 28, 0.3);
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 992px) {
  .hero-grid,
  .calc-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 78px;
    left: 0;
    width: 100%;
    background: var(--color-surface);
    flex-direction: column;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--color-border);
    gap: 1rem;
  }
  
  .nav-menu.show {
    display: flex;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
}