/* GridTech Innovations Ltd - brand tokens (light theme) */
:root {
  --bg-page: #f0f4f8;
  --bg-card: #ffffff;
  --bg-elevated: #e9f0f7;
  --bg-deep: #1a3c5e;
  --blue-primary: #1a3c5e;
  --blue-bright: #2d5a87;
  --blue-text: #2d5a87;
  --green-primary: #1b4332;
  --green-accent: #2d6a4f;
  --green-glow: rgba(45, 106, 79, 0.15);
  --ink: #1a2433;
  --muted: #5c6b7a;
  --text-inverse: #fafcfe;
  --border: rgba(26, 60, 94, 0.12);
  --font-serif: "Playfair Display", Georgia, serif;
  --font-sans: "Inter", system-ui, sans-serif;
  --max-width: 1200px;
  --header-h: 96px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--blue-primary);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  color: var(--ink);
}

.container {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-link img {
  height: 68px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.logo-link:hover img {
  opacity: 0.92;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--blue-bright);
  font-weight: 600;
  display: none;
}

@media (min-width: 480px) {
  .logo-text {
    display: block;
  }
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-main a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
}

.nav-main a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--green-accent);
  transition: width var(--transition);
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--ink);
}

.nav-main a:hover::after,
.nav-main a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: var(--transition);
}

.nav-backdrop {
  display: none;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    z-index: 102;
    position: relative;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-backdrop {
    display: block;
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
  }

  .nav-backdrop.visible {
    opacity: 1;
    visibility: visible;
  }

  body.nav-open {
    overflow: hidden;
  }

  .nav-main {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: min(280px, 85vw);
    height: calc(100vh - var(--header-h));
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    gap: 1.5rem;
    background: var(--bg-card);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 101;
    box-shadow: -8px 0 32px rgba(26, 36, 51, 0.12);
  }

  .nav-main.open {
    transform: translateX(0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--blue-primary);
  color: var(--text-inverse);
  border: 1px solid var(--blue-bright);
}

.btn-primary:hover {
  background: var(--blue-bright);
  color: var(--text-inverse);
  box-shadow: 0 8px 24px rgba(26, 60, 94, 0.35);
}

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

.btn-outline:hover {
  background: var(--green-primary);
  border-color: var(--green-accent);
  color: var(--text-inverse);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
}

.hero-photo {
  position: absolute;
  inset: 0;
  background-image: url("../assets/images/hero-grid.jpg");
  background-size: cover;
  background-position: center 40%;
  z-index: 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(10, 12, 15, 0.92) 0%, rgba(10, 12, 15, 0.75) 45%, rgba(10, 12, 15, 0.55) 100%),
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(26, 60, 94, 0.35), transparent),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(27, 67, 50, 0.22), transparent);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 4rem 0 6rem;
  max-width: 720px;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-accent);
  border: 1px solid var(--green-primary);
  border-radius: 2px;
  margin-bottom: 1.5rem;
  background: rgba(27, 67, 50, 0.25);
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  margin-bottom: 1.25rem;
  color: var(--text-inverse);
}

.hero h1 span {
  color: var(--blue-text);
}

.hero-lead {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero .btn-outline {
  color: var(--text-inverse);
  border-color: var(--green-accent);
}

.hero .btn-outline:hover {
  background: var(--green-primary);
  border-color: var(--green-accent);
  color: var(--text-inverse);
}

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

.hero-visual {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-45%);
  width: min(45vw, 520px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 1;
}

@media (max-width: 900px) {
  .hero-visual {
    display: none;
  }
}

/* Sections */
section {
  padding: 5rem 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3.5rem;
}

.section-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green-accent);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--muted);
}

/* Services grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green-primary), var(--blue-primary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.service-card:hover {
  border-color: rgba(45, 106, 79, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(26, 36, 51, 0.1);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  color: var(--green-accent);
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Stats */
.stats-bar {
  background: var(--bg-card);
  border-block: 1px solid var(--border);
  padding: 3rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-item strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--blue-text);
  margin-bottom: 0.25rem;
}

.stat-item span {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--blue-primary) 0%, var(--green-primary) 100%);
  padding: 4rem 0;
  text-align: center;
}

.cta-band h2 {
  margin-bottom: 1rem;
  color: var(--text-inverse);
}

.cta-band p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin: 0 auto 1.75rem;
}

.cta-band .btn-primary {
  background: var(--text-inverse);
  color: var(--blue-primary);
  border-color: var(--text-inverse);
}

.cta-band .btn-primary:hover {
  background: rgba(250, 252, 254, 0.9);
  color: var(--blue-primary);
}

/* Page hero (inner pages) */
.page-hero {
  padding: calc(var(--header-h) + 4rem) 0 3rem;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(26, 60, 94, 0.08), transparent),
    var(--bg-page);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.page-hero p {
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

/* About */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 4rem;
}

@media (max-width: 768px) {
  .about-intro {
    grid-template-columns: 1fr;
  }
}

.about-intro-text h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.about-intro-text p {
  color: var(--muted);
  margin-bottom: 1rem;
}

.about-visual {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2.5rem;
  position: relative;
}

.about-intro-image {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.about-intro-image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.photo-section {
  padding: 5rem 0;
  background: var(--bg-card);
  border-block: 1px solid var(--border);
}

/* Photo gallery */
.photo-gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}

.photo-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  min-height: 220px;
}

.photo-card img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.photo-card:hover img {
  transform: scale(1.04);
}

.photo-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(26, 36, 51, 0.75) 100%);
  pointer-events: none;
}

.photo-card-caption {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 1;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-inverse);
}

.photo-card--wide {
  grid-column: span 7;
}

.photo-card--tall {
  grid-column: span 5;
}

.photo-card--half {
  grid-column: span 6;
}

@media (max-width: 900px) {
  .photo-card--wide,
  .photo-card--tall,
  .photo-card--half {
    grid-column: span 12;
  }
}

.page-hero--image {
  position: relative;
  overflow: hidden;
}

.page-hero--image .page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.45;
}

.page-hero--image .page-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(240, 244, 248, 0.88) 100%);
}

.page-hero--image .container {
  position: relative;
  z-index: 1;
}

.about-visual::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 8px;
  padding: 1px;
  background: linear-gradient(135deg, var(--green-primary), var(--blue-primary));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.expertise-list {
  list-style: none;
  max-width: 720px;
  margin-inline: auto;
}

.expertise-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}

.expertise-list strong {
  color: var(--ink);
  display: block;
  margin-bottom: 0.25rem;
}

.expertise-list li:last-child {
  border-bottom: none;
}

.expertise-list svg {
  flex-shrink: 0;
  color: var(--green-accent);
  margin-top: 0.2rem;
}

.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--green-primary);
  max-width: 640px;
  margin: 0 auto;
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  margin-left: -5px;
  background: var(--blue-primary);
  border: 2px solid var(--green-accent);
  border-radius: 50%;
}

.timeline-item h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.timeline-item p {
  color: var(--muted);
  font-size: 0.95rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.value-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.75rem;
}

.value-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--blue-text);
}

.value-card p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Contact */
.contact-layout {
  display: block;
  max-width: 640px;
  margin: 0 auto;
}

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

.contact-detail svg {
  flex-shrink: 0;
  color: var(--green-accent);
}

.contact-detail strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.contact-detail a,
.contact-detail span,
.contact-detail address {
  color: var(--ink);
  font-style: normal;
  line-height: 1.6;
}

.contact-single {
  max-width: 640px;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2.5rem;
}

.contact-company-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 1rem;
  color: var(--blue-text);
}

.contact-intro {
  color: var(--muted);
  margin-bottom: 2rem;
}

/* Footer */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(2, 1fr);
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand img {
  height: 60px;
  width: auto;
  margin-bottom: 1rem;
  object-fit: contain;
}

.footer-brand p {
  color: var(--muted);
  font-size: 0.9rem;
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

main {
  flex: 1;
}

body {
  display: flex;
  flex-direction: column;
}