/* ============================================
   STRATA — Global Capability Centre for Subsurface
   Design Tokens & Component Styles
   ============================================ */

/* --- Fonts --- */
@import url('https://api.fontshare.com/v2/css?f[]=general-sans@400,500,600,700&f[]=cabinet-grotesk@500,700,800&display=swap');

/* --- Design Tokens --- */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Font Families */
  --font-display: 'Cabinet Grotesk', 'Arial Black', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;

  /* STRATA Dark Palette — Deep Subsurface */
  --color-bg:             #0a0e17;
  --color-surface:        #0f1420;
  --color-surface-2:      #141a2a;
  --color-surface-offset: #1a2236;
  --color-surface-dynamic:#1e2844;
  --color-divider:        rgba(255,255,255,0.06);
  --color-border:         rgba(255,255,255,0.08);

  /* Text */
  --color-text:           #e8e6e1;
  --color-text-muted:     #8a8d96;
  --color-text-faint:     #505664;
  --color-text-inverse:   #0a0e17;

  /* Primary Accent — Amber (geological warmth) */
  --color-primary:        #d4952a;
  --color-primary-hover:  #e8a93e;
  --color-primary-active: #c08420;
  --color-primary-highlight: rgba(212,149,42,0.12);

  /* Secondary — Slate Blue (technical depth) */
  --color-secondary:      #3a7bd5;
  --color-secondary-hover:#4e8de4;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

body {
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

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

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  background: rgba(10,14,23,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__logo svg {
  width: 40px;
  height: 40px;
}

.header__brand {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.header__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--color-text);
}

.header__brand-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  font-weight: 500;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.header__nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-interactive);
}

.header__nav a:hover {
  color: var(--color-text);
}

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}
.header__cta:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}

/* ============================================
   HERO
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10,14,23,0.4) 0%,
    rgba(10,14,23,0.2) 40%,
    rgba(10,14,23,0.7) 80%,
    rgba(10,14,23,1) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-32) var(--space-6) var(--space-16);
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.hero__eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--color-primary);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  max-width: 14ch;
}

.hero__title span {
  color: var(--color-primary);
}

.hero__desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-bottom: var(--space-10);
  line-height: 1.6;
}

.hero__stats {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.hero__stat {
  display: flex;
  flex-direction: column;
}

.hero__stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1;
}

.hero__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ============================================
   SECTION COMMON
   ============================================ */

.section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
}

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

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section__eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-12);
}

/* ============================================
   ABOUT
   ============================================ */

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
  line-height: 1.7;
}

.about__highlight {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
}

.about__highlight p {
  font-size: var(--text-lg);
  color: var(--color-text);
  font-weight: 500;
  line-height: 1.5;
}

.about__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.about__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.pillar {
  padding: var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.pillar:hover {
  border-color: rgba(212,149,42,0.2);
  box-shadow: 0 0 24px rgba(212,149,42,0.06);
}

.pillar__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.pillar__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.pillar__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================
   SERVICES
   ============================================ */

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.service-card {
  padding: var(--space-8);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.service-card:hover {
  border-color: rgba(212,149,42,0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.service-card__number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.service-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.service-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-sm);
}

/* ============================================
   TECHNOLOGY / AI
   ============================================ */

.tech__layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-12);
  align-items: center;
}

.tech__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.tech__image img {
  width: 100%;
  height: auto;
}

.tech__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.tech__item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.tech__item-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  color: var(--color-primary);
}

.tech__item-text h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.tech__item-text p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================
   METRICS BAR
   ============================================ */

.metrics {
  padding: var(--space-12) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.metrics__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.metric__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.metric__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* ============================================
   GLOBAL PRESENCE
   ============================================ */

.global__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.global__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.global__image img {
  width: 100%;
  height: auto;
}

.global__offices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.office {
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.office__city {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.office__role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================
   LEADERSHIP
   ============================================ */

.team__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-6);
}

.team-card {
  padding: var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.team-card__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  background: var(--color-surface-dynamic);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
}

.team-card__name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.team-card__role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ============================================
   CLIENTS
   ============================================ */

.clients__logos {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  justify-content: center;
  align-items: center;
  margin-top: var(--space-8);
}

.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  min-width: 140px;
  text-align: center;
  transition: border-color var(--transition-interactive);
}

.client-logo:hover {
  border-color: rgba(212,149,42,0.2);
}

/* ============================================
   COUNTRIES
   ============================================ */
.countries__wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.country-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: rgba(58,123,213,0.08);
  border: 1px solid rgba(58,123,213,0.12);
  border-radius: var(--radius-sm);
}

/* ============================================
   CTA SECTION
   ============================================ */

.cta-section {
  padding: var(--space-24) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(212,149,42,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.cta-section__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 48ch;
  margin: 0 auto var(--space-8);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.cta-btn:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212,149,42,0.2);
}

.cta-btn:active {
  transform: translateY(0);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  padding: var(--space-12) 0 var(--space-6);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer__brand-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 32ch;
  line-height: 1.6;
}

.footer__col-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer__links a:hover {
  color: var(--color-text);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__bottom a {
  color: var(--color-text-faint);
  text-decoration: none;
}
.footer__bottom a:hover {
  color: var(--color-text-muted);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */

.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .about__grid,
  .tech__layout,
  .global__layout {
    grid-template-columns: 1fr;
  }
  
  .services__grid {
    grid-template-columns: 1fr;
  }

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

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10,14,23,0.96);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }

  .header__nav.active {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero__title {
    font-size: var(--text-2xl);
  }

  .hero__stats {
    gap: var(--space-8);
  }

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

  .metrics__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }

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

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

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

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__stats {
    flex-direction: column;
    gap: var(--space-6);
  }

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

  .clients__logos {
    gap: var(--space-4);
  }

  .client-logo {
    min-width: 120px;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-xs);
  }
}