:root {
  --color-primary: #008b9f;
  --color-primary-dark: #006c82;
  --color-text: #4f5260;
  --color-muted: #8a8d99;
  --color-bg: #f7f7f7;
  --color-surface: #ffffff;
  --color-surface-alt: #cdd8dc;
  --color-footer-bg: #1b1c26;
  --color-footer-text: #e5e5e5;
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-strong: 0 18px 40px rgba(0, 0, 0, 0.16);
  --radius: 14px;
}

/* Reset & base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Barlow", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

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

button {
  font: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 28px;
}

.section-kicker {
  display: inline-block;
  margin-bottom: 8px;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  font-size: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--color-primary);
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: none;
}

.btn-outline:hover {
  background: rgba(0, 139, 159, 0.1);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
  background: transparent;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-soft);
  padding: 10px 0;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo img {
  height: 52px;
  width: auto;
}

.main-nav {
  display: flex;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 18px;
  margin: 0;
  padding: 0;
  font-weight: 700;
}

.nav-link {
  position: relative;
  padding: 10px 8px;
  border-radius: 8px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 4px;
  height: 3px;
  border-radius: 999px;
  background: transparent;
  transform: scaleX(0);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link--active,
.nav-link--active:hover {
  color: var(--color-primary);
}

.nav-link--active::after,
.nav-link:hover::after {
  background: var(--color-primary);
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.08);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: #ffffff;
}

.nav-open .nav-toggle span {
  background: var(--color-primary);
}

.nav-open .site-header {
  background: rgba(255, 255, 255, 0.98);
}

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

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: stretch;
  background: #0f111a;
  color: #ffffff;
  overflow: hidden;
}

.hero.hero--small {
  min-height: auto;
  padding: 130px 0 80px;
  background: var(--color-bg);
  color: var(--color-text);
}

.hero.hero--small .container {
  position: relative;
  z-index: 2;
}

.hero.hero--small .hero-overlay,
.hero.hero--small .hero-slider-track {
  display: none;
}

.hero.hero--small h1 {
  color: var(--color-text);
  margin-bottom: 10px;
}

.hero.hero--small p {
  color: var(--color-muted);
  max-width: 820px;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.1));
  z-index: 1;
}

.hero-slider-track {
  position: relative;
  width: 100%;
  height: 100%;
  z-index: 2;
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
  transform: translateY(20px);
}

.hero-slide.is-active {
  opacity: 1;
  transform: translateY(0);
  z-index: 2;
}

.hero-slide-content {
  position: relative;
  max-width: 760px;
  padding: 120px 24px 140px;
}

.hero-media {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.9);
  transform: translateY(0);
  transition: transform 0.5s ease;
}

.hero-media-1 {
  background-image: url("../img/projects/pro-05.jpg");
}

.hero-media-2 {
  background-image: url("../img/projects/part-02.jpg");
}

.hero-media-3 {
  background-image: url("../img/projects/indus-01.jpg");
}

.hero-kicker {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(0, 139, 159, 0.22);
  color: #ffffff;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2.2rem, 3.6vw, 3rem);
  line-height: 1.1;
}

.hero p {
  margin: 0 0 24px;
  max-width: 640px;
  color: #e3e8ed;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-dots {
  position: absolute;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.hero-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.hero-dots button.is-active {
  background: #ffffff;
  transform: scale(1.15);
}

/* About */
.about {
  background: var(--color-bg);
}

.about-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  align-items: center;
}

.about-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-strong);
}

.about-text h2 {
  margin: 6px 0 12px;
  font-size: 2rem;
}

.about-text p {
  margin: 0 0 12px;
  color: var(--color-text);
}

.about-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 12px;
}

/* Services */
.services-block {
  background: var(--color-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.service-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: grid;
  gap: 10px;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-strong);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 139, 159, 0.14);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  font-weight: 800;
}

.service-link {
  color: var(--color-primary);
  font-weight: 700;
}

/* Process */
.process {
  background: var(--color-bg);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.process-step {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.process-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  display: grid;
  place-items: center;
  font-weight: 800;
}

/* Portfolio */
.portfolio {
  background: var(--color-surface);
}

.page-section {
  padding: 70px 0;
  background: var(--color-bg);
}

.two-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  align-items: start;
}

.two-columns .col {
  background: var(--color-surface);
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  color: var(--color-text);
}

.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 0 auto 18px;
}

.btn-filter.is-active {
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  border-color: var(--color-primary);
}

.portfolio-grid {
  column-count: 3;
  column-gap: 16px;
}

.portfolio-grid .project-item {
  break-inside: avoid;
  margin-bottom: 16px;
}

.project-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-item img {
  width: 100%;
  display: block;
}

.project-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.project-item.is-hidden {
  display: none;
}

.project-meta {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

.project-badge,
.project-location {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  color: #ffffff;
  font-size: 0.9rem;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.project-badge {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
}

/* CTA */
.cta-full {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  text-align: center;
}

.cta-inner {
  display: grid;
  gap: 12px;
  justify-items: center;
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.cta-full .btn-outline {
  color: #ffffff;
  border-color: #ffffff;
}

.cta-full .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Blog */
.blog-preview {
  background: var(--color-bg);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.blog-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.blog-thumb {
  width: 100%;
  padding-top: 62%;
  background-size: cover;
  background-position: center;
}

.blog-card h3 {
  margin: 0 16px;
}

.blog-card p {
  margin: 0 16px 12px;
  color: var(--color-muted);
}

.blog-link {
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 16px 16px;
}

/* Footer */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  padding: 48px 0 24px;
}

.footer-logo {
  height: 46px;
  margin-bottom: 10px;
}

.footer-col h4 {
  margin: 0 0 10px;
}

.footer-col p {
  margin: 0 0 10px;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.footer-col a {
  color: #ffffff;
}

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

.footer-phone {
  font-weight: 800;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 0;
  background: #11121a;
}

.footer-bottom-inner {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  color: #cfd2da;
}

/* Floating CTA */
.floating-cta {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 200;
  padding: 12px 16px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.floating-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.28);
}

@media (min-width: 1025px) {
  .floating-cta {
    display: none;
  }
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.65);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 300;
}

.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
}

.lightbox-content {
  position: relative;
  background: #ffffff;
  padding: 12px;
  border-radius: 14px;
  max-width: 920px;
  width: 100%;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.lightbox-content img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
}

.lightbox-caption {
  margin-top: 8px;
  color: var(--color-text);
  font-weight: 600;
}

.lightbox-close {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background: var(--color-primary);
  color: #ffffff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.18);
}

body.no-scroll {
  overflow: hidden;
}

/* Reveal on scroll */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-on-scroll.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
  section {
    padding: 70px 0;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(80vw, 320px);
    background: #ffffff;
    padding: 120px 24px 24px;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.08);
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .nav-list {
    flex-direction: column;
    gap: 12px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero-slide-content {
    padding: 140px 24px 120px;
  }

  .portfolio-grid {
    column-count: 2;
  }
}

@media (max-width: 768px) {
  section {
    padding: 56px 0;
  }

  .hero {
    min-height: 90vh;
  }

  .hero.hero--small {
    padding: 110px 0 70px;
  }

  .hero-slide-content {
    padding-top: 120px;
  }

  .hero-actions {
    width: 100%;
  }

  .hero-actions .btn,
  .hero-actions .btn-outline {
    width: 100%;
    justify-content: center;
  }

  .portfolio-grid {
    column-count: 1;
  }

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

  .floating-cta {
    right: 12px;
    left: auto;
    bottom: 12px;
  }
}

/* Forms (for contact page reuse) */
.page-section {
  padding: 64px 0;
  background: var(--color-bg);
}

.hero--small {
  min-height: auto;
  padding: 64px 0;
}

.contact-form {
  width: 100%;
  max-width: 540px;
  display: grid;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--color-muted);
  font: inherit;
  color: var(--color-text);
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 139, 159, 0.15);
}

.contact-form .btn {
  justify-self: start;
}