@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors - Mineral Tech (Slate + Cyan inspired by data/geology) */
  --accent: #0056b3;
  --accent-hover: #003d82;
  --accent-press: #002d62;
  --on-accent: #FFFFFF;
  --ink: #FFFFFF;
  --ink-muted: #94A3B8;
  --ink-subtle: #64748B;
  --canvas: #FFFFFF;
  --canvas-dark: #0F172A;
  --canvas-dark-elevated: #1E293B;
  --surface-1: #F1F5F9;
  --hairline: #E2E8F0;
  --hairline-dark: #1E293B;
  --hairline-strong: #334155;
  --footer-bg: #1E293B;

  --font-sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;

  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 96px;

  --max-width: 1200px;
  --nav-height: 60px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

html { font-size: 16px; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: -0.01em;
  color: #0F172A;
  background: var(--canvas);
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: #0F172A;
}

h1 { font-size: 52px; letter-spacing: -0.03em; }
h2 { font-size: 34px; }
h3 { font-size: 24px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.2; }
h4 { font-size: 19px; font-weight: 500; letter-spacing: -0.01em; line-height: 1.4; }
h5 { font-size: 15px; font-weight: 600; letter-spacing: 0; line-height: 1.4; }

p { margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }

a {
  color: var(--accent);
  transition: color 0.15s;
}
a:hover { color: var(--accent-hover); }

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
}

.lead {
  font-size: 17px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: -0.01em;
}

/* Dark text overrides */
.dark h1, .dark h2, .dark h3, .dark h4, .dark h5 { color: var(--ink); }
.dark, .dark p { color: var(--ink-muted); }
.dark .eyebrow { color: var(--accent); }

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-section) 0;
}

.section-alt {
  background: var(--surface-1);
}

/* ============================================
   HEADER / NAV
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--canvas-dark);
  border-bottom: 1px solid var(--hairline-dark);
  height: var(--nav-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--ink);
  font-weight: 600;
  font-size: 16px;
}
.logo img {
  height: 36px;
  width: auto;
}

.nav-list {
  display: flex;
  gap: 0;
  height: 100%;
}

.nav-list a {
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--ink-muted);
  height: 100%;
  transition: color 0.15s;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 0;
  transition: transform 0.2s, opacity 0.2s;
}

/* ============================================
   HERO — split layout
   ============================================ */
.hero {
  padding: 96px 0 0;
  background: var(--canvas-dark);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background-image:
    radial-gradient(circle at 25% 50%, rgba(6,182,212,0.06) 0%, transparent 50%),
    radial-gradient(circle at 75% 20%, rgba(6,182,212,0.04) 0%, transparent 50%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xxl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero-content p {
  font-size: 17px;
  color: var(--ink-muted);
  margin-bottom: var(--space-xl);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-xxl) 0;
}

.hero-diagram {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline-dark);
  background: var(--canvas-dark-elevated);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.hero-diagram::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--hairline-dark) 1px, transparent 1px),
    linear-gradient(0deg, var(--hairline-dark) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.3;
}

.hero-diagram .ring {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 2px solid rgba(6,182,212,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-diagram .ring::before {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid rgba(6,182,212,0.5);
}

.hero-diagram .ring::after {
  content: '';
  position: absolute;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(6,182,212,0.15);
  border: 2px solid var(--accent);
}

.hero-diagram .label-top {
  font-size: 11px;
  color: var(--ink-subtle);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
}

.hero-diagram .label-bottom {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--on-accent);
}
.btn-primary:active {
  background: var(--accent-press);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-outline-light {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink-muted);
}
.btn-outline-light:hover {
  background: var(--ink);
  color: var(--canvas-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 12px 6px;
  font-weight: 500;
}
.btn-ghost:hover {
  color: var(--accent-hover);
}

.btn + .btn {
  margin-left: var(--space-sm);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.card-accent {
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--radius-md);
  padding: var(--space-xxl);
}
.card-accent h3 { color: var(--on-accent); }
.card-accent .btn-outline {
  border-color: var(--on-accent);
  color: var(--on-accent);
}
.card-accent .btn-outline:hover {
  background: var(--on-accent);
  color: var(--accent);
}

/* ============================================
   GRID
   ============================================ */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-lg);
}

/* ============================================
   SERVICE CARDS — rounded, clean
   ============================================ */
.service-card {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: border-color 0.2s, box-shadow 0.2s;
  background: var(--canvas);
}
.service-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(6,182,212,0.08);
}

.service-card .icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6,182,212,0.1);
  border-radius: var(--radius-sm);
  font-size: 20px;
  color: var(--accent);
}

.service-card h4 {
  margin-bottom: var(--space-xs);
}

.service-card p {
  font-size: 14px;
  color: var(--ink-subtle);
  letter-spacing: 0;
}

/* ============================================
   REFERENCE LIST
   ============================================ */
.ref-list {
  border-top: 1px solid var(--hairline);
}

.ref-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--hairline);
  align-items: flex-start;
}

.ref-item .num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6,182,212,0.1);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  margin-top: 2px;
}

.ref-item .text {
  font-size: 14px;
  letter-spacing: 0;
  color: var(--ink-subtle);
}

/* ============================================
   ABOUT / VALUES
   ============================================ */
.values-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.value-item {
  padding: var(--space-lg);
  background: var(--surface-1);
  border-radius: var(--radius-md);
  text-align: center;
}

.value-item .num {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.value-item h5 {
  margin-bottom: var(--space-xs);
}

.value-item p {
  font-size: 14px;
  color: var(--ink-subtle);
  letter-spacing: 0;
}

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xxl);
}

.contact-info-item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  align-items: flex-start;
}

.contact-info-item .icon { flex-shrink: 0; width: 20px; height: 20px; margin-top: 2px; }

.contact-info-item .label {
  font-size: 12px;
  color: var(--ink-subtle);
  letter-spacing: 0.08em;
  margin-bottom: 2px;
  text-transform: uppercase;
  font-weight: 500;
}

.contact-info-item .value {
  font-size: 16px;
  letter-spacing: 0;
}

/* Form */
.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  color: #0F172A;
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 11px 16px;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  color: #0F172A;
  font-size: 16px;
  font-family: var(--font-sans);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(6,182,212,0.12);
}

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

.form-group .required { color: #EF4444; }

.form-group.checkbox {
  display: flex;
  gap: var(--space-xs);
  align-items: flex-start;
}

.form-group.checkbox input { width: auto; margin-top: 4px; }

.form-group.checkbox label {
  margin-bottom: 0;
  font-size: 13px;
  color: var(--ink-subtle);
  font-weight: 400;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--footer-bg);
  color: var(--ink-muted);
  padding: var(--space-xxl) 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.footer-col h5 {
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: var(--space-md);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--ink-muted);
  letter-spacing: 0;
  padding: 4px 0;
  transition: color 0.15s;
}

.footer-col a:hover { color: var(--ink); }

.footer-col p { font-size: 14px; letter-spacing: 0; }

.footer-bottom {
  border-top: 1px solid var(--hairline-dark);
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  text-align: center;
  font-size: 12px;
  letter-spacing: 0;
  color: var(--ink-subtle);
}

.footer-logo { margin-bottom: var(--space-md); }
.footer-logo img { height: 32px; width: auto; }

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
  padding: 64px 0 48px;
  background: var(--canvas-dark);
}

.page-header h1 { margin-bottom: var(--space-sm); }

.page-header p {
  color: var(--ink-muted);
  font-size: 18px;
  max-width: 640px;
}

/* ============================================
   DIVIDER accent line
   ============================================ */
.divider {
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: var(--space-lg) 0;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.text-center { text-align: center; }
.text-muted { color: var(--ink-subtle); }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-500 { max-width: 500px; }
.max-w-640 { max-width: 640px; }
.p-0 { padding: 0; }
.items-start { align-items: start; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  h1 { font-size: 38px; }
  h2 { font-size: 28px; }

  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { display: none; }

  .grid-3 { grid-template-columns: 1fr 1fr; }

  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  h3 { font-size: 20px; }

  .section { padding: 48px 0; }
  .hero { padding: 48px 0 0; }

  .grid-2, .grid-3 { grid-template-columns: 1fr; }

  .values-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }

  .nav-toggle { display: flex; }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--canvas-dark);
    border-bottom: 1px solid var(--hairline-dark);
    height: auto;
  }

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

  .nav-list a {
    height: 44px;
    border-bottom: 1px solid var(--hairline-dark);
    padding: 0 var(--space-lg);
  }

  .page-header { padding: 40px 0 32px; }
}

@media (max-width: 480px) {
  h1 { font-size: 26px; }
  h2 { font-size: 22px; }

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

  .btn + .btn { margin-left: 0; margin-top: var(--space-xs); }
}