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

:root {
  --bg-main: #050713;
  --bg-soft: #0b1020;
  --bg-card: rgba(255, 255, 255, 0.045);
  --bg-card-strong: rgba(255, 255, 255, 0.08);

  --text-main: #f4f7fb;
  --text-soft: #b7c0d1;
  --text-muted: #7d8799;

  --blue: #00aaff;
  --purple: #b300ff;
  --cyan: #2ee8ff;
  --border: rgba(255, 255, 255, 0.12);

  --max-width: 1220px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;

  --shadow-soft: 0 20px 60px rgba(0, 0, 0, 0.35);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(0, 170, 255, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(179, 0, 255, 0.18), transparent 30%),
    var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
}

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

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

button {
  font-family: inherit;
}

.container {
  width: min(100% - 32px, var(--max-width));
  margin-inline: auto;
}

.section-padding {
  padding: 90px 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-label::before {
  content: "";
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--purple));
  border-radius: 100px;
}

h1, h2, h3, h4 {
  line-height: 1.1;
  letter-spacing: -0.04em;
}

h1 {
  font-size: clamp(2.6rem, 6vw, 5.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
}

h4 {
  font-size: 1.05rem;
  color: var(--cyan);
  margin-bottom: 10px;
}

p {
  color: var(--text-soft);
  font-size: 1rem;
}

strong {
  color: var(--text-main);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 7, 19, 0.78);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px);
}

.header-content {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  color: var(--text-soft);
  font-size: 0.95rem;
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--cyan);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 12px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  margin: 5px auto;
  border-radius: 10px;
}

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

.hero {
  padding: 24px;
  min-height: 82vh;
  display: grid;
  place-items: center;
}

.hero-image-wrapper {
  width: min(100%, 1600px);
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  background: #000;
}

.hero-image {
  width: 100%;
  height: auto;
}

/* =========================
   INTRO
========================= */

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) 420px;
  gap: 40px;
  align-items: start;
}

.intro p {
  max-width: 820px;
  margin-top: 18px;
}

.info-card {
  background: linear-gradient(145deg, rgba(255,255,255,0.07), rgba(255,255,255,0.03));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-soft);
}

.info-card h2 {
  font-size: 1.55rem;
  margin-bottom: 18px;
}

.info-card ul {
  list-style: none;
}

.info-card li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-soft);
}

.info-card li:last-child {
  border-bottom: 0;
}

/* =========================
   PROJECTS
========================= */

.projects {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), transparent),
    var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-heading {
  max-width: 860px;
  margin-bottom: 34px;
}

.section-heading p {
  margin-top: 16px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.filter-btn {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-soft);
  padding: 12px 18px;
  border-radius: 100px;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--text-main);
  border-color: rgba(46, 232, 255, 0.55);
  background: linear-gradient(90deg, rgba(0,170,255,0.22), rgba(179,0,255,0.20));
}

.project-block {
  margin-bottom: 70px;
  padding: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(0, 170, 255, 0.08), transparent 30%),
    radial-gradient(circle at bottom right, rgba(179, 0, 255, 0.10), transparent 30%),
    rgba(255, 255, 255, 0.035);
  box-shadow: var(--shadow-soft);
}

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

.project-header {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 24px;
  margin-bottom: 34px;
}

.project-number {
  width: 74px;
  height: 74px;
  display: grid;
  place-items: center;
  border-radius: 22px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  font-weight: 900;
  font-size: 1.45rem;
}

.project-header p {
  margin-top: 14px;
  max-width: 880px;
}

.project-description {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 34px;
}

.project-description > div {
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
}

/* =========================
   MASONRY GALLERY
========================= */

.masonry-gallery {
  column-count: 3;
  column-gap: 18px;
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: 18px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.gallery-item:hover {
  transform: translateY(-4px);
  border-color: rgba(46, 232, 255, 0.55);
  box-shadow: 0 18px 50px rgba(0, 170, 255, 0.10);
}

.gallery-item img {
  width: 100%;
  height: auto;
}

.gallery-item figcaption {
  padding: 14px 16px;
  color: var(--text-soft);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

.gallery-item.featured {
  border-color: rgba(179, 0, 255, 0.45);
}

.project-actions {
  margin-top: 24px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-weight: 800;
  border-bottom: 1px solid rgba(46, 232, 255, 0.55);
  padding-bottom: 4px;
}

.text-link::after {
  content: "↗";
  font-size: 0.95rem;
}

/* =========================
   VIDEO
========================= */

.video-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 40px;
  align-items: center;
}

.video-grid p {
  margin-top: 18px;
}

.video-list {
  margin-top: 22px;
  list-style: none;
  display: grid;
  gap: 12px;
}

.video-list li {
  color: var(--text-soft);
  padding-left: 26px;
  position: relative;
}

.video-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  border-radius: 100px;
  position: absolute;
  left: 0;
  top: 10px;
}

.video-box {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  box-shadow: var(--shadow-soft);
}

.video-box iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* =========================
   REFERENCES
========================= */

.references {
  background: rgba(255,255,255,0.025);
  border-top: 1px solid var(--border);
}

.reference-card {
  margin-top: 28px;
  padding: 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.reference-card p {
  margin-bottom: 18px;
}

.reference-card p:last-child {
  margin-bottom: 0;
}

/* =========================
   LIGHTBOX
========================= */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  place-items: center;
  padding: 34px;
}

.lightbox.is-open {
  display: grid;
}

.lightbox img {
  max-width: min(100%, 1200px);
  max-height: 82vh;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.lightbox p {
  margin-top: 18px;
  text-align: center;
  color: var(--text-soft);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 28px;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: rgba(255,255,255,0.08);
  color: var(--text-main);
  font-size: 2rem;
  cursor: pointer;
}

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

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--border);
  background: #03050d;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
}

.footer-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

@media (max-width: 980px) {
  .intro-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .project-description {
    grid-template-columns: 1fr;
  }

  .masonry-gallery {
    column-count: 2;
  }
}

@media (max-width: 760px) {
  .main-nav {
    position: absolute;
    top: 76px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(5, 7, 19, 0.96);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 14px;
    border-bottom: 1px solid var(--border);
  }

  .main-nav a:last-child {
    border-bottom: 0;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 12px;
    min-height: auto;
  }

  .hero-image-wrapper {
    border-radius: 18px;
  }

  .section-padding {
    padding: 64px 0;
  }

  .project-block {
    padding: 22px;
  }

  .project-header {
    grid-template-columns: 1fr;
  }

  .masonry-gallery {
    column-count: 1;
  }

  .footer-content {
    display: block;
  }

  .footer-content p + p {
    margin-top: 8px;
  }
}