/* ==========================================================================
   LUMENT. Website Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens
   -------------------------------------------------------------------------- */

:root {
  /* Colours */
  --blue-deep: #0062A3;
  --blue-bright: #3498EA;
  --blue-light: #B6E1FF;
  --blue-wash: #EBF5FF;
  --silver: #A2ABAA;
  --grey-dark: #3A3A4A;
  --grey-mid: #6E6C7A;
  --grey-light: #80808A;
  --white: #FFFFFF;
  --off-white: #F8F9FA;

  /* Typography */
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Layout */
  --max-width: 1100px;
  --nav-height: 64px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

/* --------------------------------------------------------------------------
   2. Reset
   -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--grey-dark);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

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

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. Base Typography
   -------------------------------------------------------------------------- */

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.2;
  color: var(--grey-dark);
}

h2 {
  font-weight: 700;
  font-size: clamp(28px, 3vw, 36px);
}

h3 {
  font-weight: 700;
  font-size: clamp(18px, 2vw, 22px);
}

p {
  color: var(--grey-mid);
  margin-bottom: var(--space-md);
}

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

/* --------------------------------------------------------------------------
   4. Layout
   -------------------------------------------------------------------------- */

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

.section {
  padding: var(--space-3xl) 0;
}

/* --------------------------------------------------------------------------
   5. Components
   -------------------------------------------------------------------------- */

/* --- Skip link --- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--blue-bright);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  border-radius: 0 0 6px 6px;
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* --- Buttons --- */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  padding: 14px 32px;
  border-radius: 6px;
  letter-spacing: 0.3px;
  transition: all var(--transition-fast);
  text-align: center;
}

.btn--primary {
  background: var(--blue-bright);
  color: var(--white);
}

.btn--primary:hover {
  background: #2b88d8;
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn--outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn--contact {
  background: var(--blue-deep);
  color: var(--white);
}

.btn--contact:hover {
  background: #004E82;
  transform: translateY(-1px);
}

/* --- Accent bar --- */

.accent-bar {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--blue-bright);
  border-radius: 2px;
  margin-bottom: var(--space-lg);
}

/* --- Gradient divider --- */

.gradient-divider {
  height: 3px;
  background: linear-gradient(90deg, var(--blue-deep), var(--blue-bright));
  border-radius: 2px;
}

/* --- Section heading --- */

.section__heading {
  margin-bottom: var(--space-2xl);
}

.section__heading h2 {
  margin-top: var(--space-sm);
}

/* --- Service tags --- */

.service-tags {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 11px;
  color: var(--grey-light);
  letter-spacing: 2.5px;
  text-transform: uppercase;
}

.service-tags--light {
  color: var(--blue-light);
}

/* --- Service list --- */

.services__list {
  display: grid;
  gap: 0;
}

.service {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
  border-bottom: 1px solid #E8E8EC;
  align-items: baseline;
}

.service:first-child {
  padding-top: 0;
}

.service:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.service__number {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--blue-bright);
  padding-top: 2px;
}

.service__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.5vw, 28px);
  color: var(--grey-dark);
  margin-bottom: var(--space-sm);
}

.service__description {
  font-size: 15px;
  max-width: 640px;
}

/* --- Logo marquee --- */

.marquee {
  display: none;
  overflow: hidden;
  padding: var(--space-2xl) 0;
  border-top: 1px solid #E8E8EC;
  border-bottom: 1px solid #E8E8EC;
  background: var(--off-white);
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.marquee__group {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
  padding-right: var(--space-3xl);
  flex-shrink: 0;
}

.marquee__logo {
  height: 32px;
  width: auto;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
  filter: grayscale(100%);
}

.marquee:hover .marquee__logo {
  opacity: 0.7;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* --- Navigation --- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  z-index: 100;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

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

.nav__wordmark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  color: var(--white);
  letter-spacing: -0.5px;
  transition: color var(--transition-base);
}

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

.nav__link {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--white);
}

.nav__cta {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  padding: 10px 24px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  transition: all var(--transition-fast);
}

.nav__cta:hover {
  background: rgba(255, 255, 255, 0.25);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

/* Nav scrolled state */

.nav--scrolled {
  background: var(--white);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

.nav--scrolled .nav__wordmark {
  color: var(--blue-deep);
}

.nav--scrolled .nav__link {
  color: var(--grey-mid);
}

.nav--scrolled .nav__link:hover {
  color: var(--grey-dark);
}

.nav--scrolled .nav__cta {
  background: var(--blue-deep);
  color: var(--white);
}

.nav--scrolled .nav__cta:hover {
  background: #004E82;
}

.nav--scrolled .nav__toggle span {
  background: var(--grey-dark);
}

/* --- Focus indicators --- */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--blue-bright);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   6. Sections
   -------------------------------------------------------------------------- */

/* --- Hero --- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--blue-deep) 0%, #004E82 100%);
  color: var(--white);
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero__content {
  max-width: 720px;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(48px, 8vw, 72px);
  color: var(--white);
  letter-spacing: -1px;
  margin-bottom: var(--space-sm);
}

.hero__tagline {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  color: var(--blue-light);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.hero__description {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: var(--space-xl);
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
}

.hero__services {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

/* --- Services --- */

.services {
  background: var(--white);
}

/* --- Approach --- */

.approach {
  background: var(--off-white);
}

.approach__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.approach__text p {
  font-size: 16px;
  line-height: 1.8;
}

.approach__differentiators {
  display: grid;
  gap: var(--space-lg);
}

.differentiator {
  border-left: 3px solid var(--blue-bright);
  padding-left: var(--space-lg);
}

.differentiator h3 {
  font-size: 18px;
  margin-bottom: var(--space-xs);
}

.differentiator p {
  font-size: 14px;
  margin-bottom: 0;
}

/* --- Contact --- */

.contact {
  background: var(--white);
}

.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact__info {
  display: grid;
  gap: var(--space-lg);
}

.contact__item-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 12px;
  color: var(--grey-light);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--space-xs);
}

.contact__item-value {
  font-size: 16px;
  color: var(--grey-dark);
  margin-bottom: 0;
}

.contact__item-value a {
  color: var(--blue-deep);
  transition: color var(--transition-fast);
}

.contact__item-value a:hover {
  color: var(--blue-bright);
}

.contact__action {
  padding-top: var(--space-xl);
}

/* --- Footer --- */

.footer {
  background: var(--off-white);
  padding: var(--space-2xl) 0 var(--space-xl);
}

.footer__top {
  padding-bottom: var(--space-xl);
}

.footer__wordmark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  color: var(--blue-deep);
  margin-bottom: var(--space-md);
}

.footer__services {
  margin-bottom: var(--space-md);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid #E8E8EC;
}

.footer__copyright {
  font-size: 13px;
  color: var(--grey-light);
  margin-bottom: 0;
}

.footer__location {
  font-size: 13px;
  color: var(--grey-light);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   7. Responsive
   -------------------------------------------------------------------------- */

/* Mobile menu */

.nav__menu {
  display: contents;
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    padding: var(--space-lg);
    flex-direction: column;
  }

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

  .nav__links {
    flex-direction: column;
    gap: var(--space-md);
  }

  .nav__link {
    color: var(--grey-mid);
    font-size: 16px;
  }

  .nav__link:hover {
    color: var(--grey-dark);
  }

  .nav__cta {
    background: var(--blue-deep);
    color: var(--white);
    text-align: center;
    margin-top: var(--space-sm);
  }

  .nav--open {
    background: var(--white);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
  }

  .nav--open .nav__wordmark {
    color: var(--blue-deep);
  }

  .nav--open .nav__toggle span {
    background: var(--grey-dark);
  }

  .nav--open .nav__toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav--open .nav__toggle span:nth-child(2) {
    opacity: 0;
  }

  .nav--open .nav__toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* Tablet and below */

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .service {
    gap: var(--space-md);
  }

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

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

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

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

@media (max-width: 640px) {
  .hero__tagline {
    font-size: 14px;
    letter-spacing: 2px;
  }

  .hero__description {
    font-size: 16px;
  }

  .service-tags {
    font-size: 10px;
    letter-spacing: 2px;
  }
}

/* --------------------------------------------------------------------------
   8. Reduced Motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}