/* ============ NEXBRIDGE DESIGN TOKENS ============ */
:root {
  --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, 4.5rem);

  --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;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 1080px;
  --content-wide: 1200px;

  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', Arial, sans-serif;
}

:root,
[data-theme='light'] {
  --color-bg: #f4f6f8;
  --color-surface: #fafbfc;
  --color-surface-2: #ffffff;
  --color-surface-offset: #eceff3;
  --color-divider: #dde2e8;
  --color-border: #ccd4dc;

  --color-text: #131c26;
  --color-text-muted: #5a6673;
  --color-text-faint: #9aa5b0;
  --color-text-inverse: #f5f8fa;

  --color-primary: #14577f;
  --color-primary-hover: #0e415f;
  --color-primary-active: #0a3049;
  --color-primary-highlight: #d6e3ec;

  --color-navy: #101d2c;
  --color-navy-2: #16283c;

  --shadow-sm: 0 1px 2px oklch(0.25 0.02 240 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.25 0.02 240 / 0.09);
  --shadow-lg: 0 12px 32px oklch(0.25 0.02 240 / 0.14);
}

[data-theme='dark'] {
  --color-bg: #0e141b;
  --color-surface: #131a22;
  --color-surface-2: #171f29;
  --color-surface-offset: #10171f;
  --color-divider: #212b36;
  --color-border: #33404d;

  --color-text: #ccd5dd;
  --color-text-muted: #7f8b97;
  --color-text-faint: #55616d;
  --color-text-inverse: #131c26;

  --color-primary: #64a3c9;
  --color-primary-hover: #86b9d7;
  --color-primary-active: #4a89af;
  --color-primary-highlight: #1d3243;

  --color-navy: #0a1017;
  --color-navy-2: #101923;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.45);
}

/* ============ LAYOUT PRIMITIVES ============ */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-8));
}

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section--offset {
  background: var(--color-surface-offset);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-2);
}

.eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.eyebrow--light {
  color: #8fc0dd;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-5);
  max-width: 22ch;
}
.section-lead {
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-bottom: var(--space-10);
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  min-height: 44px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.01em;
}
.btn--sm {
  padding: var(--space-2) var(--space-4);
  min-height: 40px;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
}
.btn--primary:active {
  background: var(--color-primary-active);
}
.btn--ghost {
  color: #eaf2f7;
  border: 1px solid oklch(1 0 0 / 0.35);
  background: oklch(1 0 0 / 0.06);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover {
  background: oklch(1 0 0 / 0.14);
  border-color: oklch(1 0 0 / 0.55);
}
.btn--light {
  background: #eaf2f7;
  color: #101d2c;
  font-size: var(--text-base);
  word-break: break-all;
}
.btn--light:hover {
  background: #ffffff;
}

/* ============ HEADER ============ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.08);
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.header--hidden {
  transform: translateY(-100%);
}
.header--scrolled {
  box-shadow: var(--shadow-sm);
}
.header__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) clamp(var(--space-4), 4vw, var(--space-8));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.brand__mark {
  color: var(--color-primary);
  flex-shrink: 0;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand__suffix {
  font-weight: 500;
  color: var(--color-text-muted);
}
@media (max-width: 560px) {
  .brand__suffix {
    display: none;
  }
}

.nav {
  display: none;
  gap: var(--space-6);
}
.nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) 0;
}
.nav a:hover {
  color: var(--color-text);
}
@media (min-width: 860px) {
  .nav {
    display: flex;
  }
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.header__actions .btn--primary {
  display: none;
}
@media (min-width: 860px) {
  .header__actions .btn--primary {
    display: inline-flex;
  }
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  align-items: center;
  border-radius: var(--radius-md);
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s;
}
.menu-toggle[aria-expanded='true'] span:first-child {
  transform: translateY(4px) rotate(45deg);
}
.menu-toggle[aria-expanded='true'] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}
@media (min-width: 860px) {
  .menu-toggle {
    display: none;
  }
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4) clamp(var(--space-4), 4vw, var(--space-8)) var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.mobile-nav.is-open {
  display: flex;
}
.mobile-nav a {
  padding: var(--space-3) 0;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}
.mobile-nav .btn {
  margin-top: var(--space-2);
}

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 82vh;
  display: flex;
  align-items: center;
  isolation: isolate;
  overflow: hidden;
}
.hero__media,
.hero__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(100deg, oklch(0.2 0.03 250 / 0.92) 0%, oklch(0.22 0.03 250 / 0.72) 45%, oklch(0.25 0.03 250 / 0.35) 100%);
}
.hero__content {
  width: 100%;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #f5f8fa;
  margin-bottom: var(--space-6);
}
.hero .eyebrow {
  color: #8fc0dd;
}
.hero__sub {
  font-size: var(--text-base);
  color: oklch(0.92 0.01 240 / 0.85);
  max-width: 54ch;
  margin-bottom: var(--space-8);
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* ============ STRIP ============ */
.strip {
  background: var(--color-navy);
  color: #dbe5ec;
  padding-block: clamp(var(--space-8), 5vw, var(--space-12));
}
.strip__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
  gap: clamp(var(--space-6), 4vw, var(--space-10));
}
.strip__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.strip__num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: #ffffff;
}
.strip__label {
  font-size: var(--text-xs);
  color: #8b9aa8;
  letter-spacing: 0.02em;
}

/* ============ ABOUT ============ */
.about__grid {
  display: grid;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: center;
}
@media (min-width: 900px) {
  .about__grid {
    grid-template-columns: 1.1fr 1fr;
  }
}
.about__text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.about__media img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}
.about__media figcaption {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.check-list {
  margin-top: var(--space-6);
  display: grid;
  gap: var(--space-3);
}
.check-list li {
  position: relative;
  padding-left: var(--space-8);
  font-weight: 500;
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.2em;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background: var(--color-primary-highlight);
}
.check-list li::after {
  content: '';
  position: absolute;
  left: 5px;
  top: calc(0.2em + 5px);
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(-45deg);
}

/* ============ SERVICES ============ */
.cards {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
}
.card {
  background: var(--color-surface-2);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.card__icon svg {
  width: 24px;
  height: 24px;
}
.card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============ INDUSTRIES ============ */
.industries__grid {
  display: grid;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: start;
}
@media (min-width: 900px) {
  .industries__grid {
    grid-template-columns: 1fr 1fr;
  }
}
.industries p {
  color: var(--color-text-muted);
}
.industry-list {
  display: grid;
  gap: var(--space-2);
}
.industry-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-2);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--text-sm);
}
.industry-list__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  flex-shrink: 0;
}

/* ============ ENGAGEMENT ============ */
.engagement__grid {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-10);
}
@media (min-width: 820px) {
  .engagement__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.model {
  background: var(--color-surface-2);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  box-shadow: var(--shadow-sm);
}
.model__index {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.model h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.model p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============ CONTACT ============ */
.contact {
  background:
    radial-gradient(80% 120% at 85% 0%, oklch(0.35 0.05 240 / 0.55) 0%, transparent 60%),
    var(--color-navy);
  color: #dbe5ec;
}
.contact__grid {
  display: grid;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: start;
}
@media (min-width: 900px) {
  .contact__grid {
    grid-template-columns: 1.2fr 1fr;
  }
}
.contact__title {
  color: #ffffff;
}
.contact__lead {
  color: #9fb0be;
  margin-bottom: var(--space-8);
  max-width: 46ch;
}
.contact__details {
  font-style: normal;
  display: grid;
  gap: var(--space-8);
  padding: var(--space-8);
  background: oklch(1 0 0 / 0.05);
  border: 1px solid oklch(1 0 0 / 0.12);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(6px);
}
.contact__block h3 {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #8fc0dd;
  margin-bottom: var(--space-2);
}
.contact__block p {
  color: #dbe5ec;
  line-height: 1.7;
}
.contact__block a {
  color: #ffffff;
  text-decoration-color: oklch(1 0 0 / 0.4);
  word-break: break-all;
}
.contact__block a:hover {
  text-decoration-color: #ffffff;
}

/* ============ FOOTER ============ */
.footer {
  background: var(--color-navy-2);
  color: #8b9aa8;
  padding-block: var(--space-12);
}
.footer__inner {
  display: grid;
  gap: var(--space-4);
  justify-items: start;
}
.brand--footer {
  color: #dbe5ec;
}
.brand--footer .brand__mark {
  color: #64a3c9;
}
.brand--footer .brand__name {
  font-size: 1rem;
}
.footer__meta {
  font-size: var(--text-xs);
}
.footer__meta a {
  color: #b8c4ce;
}
.footer__copy {
  font-size: var(--text-xs);
  color: #5f6d7a;
}

/* ============ REVEAL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}