:root {
  --color-bg: #121212;
  --color-surface: #1E1E1E;
  --color-text: #F0F0F0;
  --color-text-muted: #A0A0A0;
  --color-accent-gray: #708090;
  --color-accent-silver: #C0C0C0;
  --color-primary: #007FFF;
  --color-ghost-silver: rgba(108, 138, 158, 0.4);
  --color-ghost-silver-solid: #6c8a9e;

  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  --container-width: 1200px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px; /* offset for fixed navbar height */
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

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

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- NAVIGATION --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 0;
  background: rgba(18, 18, 18, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-ghost-silver);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

.nav-links a.active {
  color: var(--color-primary);
  font-weight: 700;
}

.btn-primary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  background-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 15px rgba(0, 127, 255, 0.5);
}

/* --- HERO SECTION --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  text-align: center;
  position: relative;
  padding-top: 180px; /* offset for nav + shift up from center */
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, #1E1E1E 0%, #121212 100%);
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  padding: 2rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero .highlight {
  color: transparent;
  -webkit-text-stroke: 1px var(--color-accent-silver);
  /* Fallback glow effect */
  text-shadow: 0 0 20px rgba(108, 138, 158, 0.3);
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  font-weight: 300;
  letter-spacing: 0.05em;
}

/* --- SECTION HEADERS --- */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
  padding-top: 6rem;
}

.section-header h2 {
  font-size: 2.5rem;
  text-transform: uppercase;
  display: inline-block;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-primary);
}

/* --- VIDEO GRID --- */
.video-section {
  padding: 4rem 0 8rem 0;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2.5rem;
}

.video-card {
  background: var(--color-surface);
  border: 1px solid var(--color-ghost-silver);
  padding: 1rem;
  border-radius: 4px;
  transition: var(--transition);
}

.video-card:hover {
  border-color: var(--color-ghost-silver-solid);
  box-shadow: 0 0 25px rgba(108, 138, 158, 0.2);
  transform: translateY(-5px);
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 ratio */
  height: 0;
  overflow: hidden;
  margin-bottom: 1rem;
  border-radius: 2px;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.video-info p {
  font-size: 0.85rem;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- ABOUT / CONTACT --- */
.about-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 4rem;
  padding: 6rem 0;
  border-top: 1px solid var(--color-ghost-silver);
}

.about-text, .contact-form-container {
  flex: 1;
  min-width: 300px;
}

.about-text p {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-muted);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-ghost-silver);
  padding: 1rem;
  color: var(--color-text);
  font-family: var(--font-body);
  border-radius: 2px;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 10px rgba(0, 127, 255, 0.2);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

/* --- MOBILE MENU --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  z-index: 1001;
}

.menu-toggle .bar {
  height: 3px;
  width: 25px;
  background-color: var(--color-text);
  border-radius: 3px;
  transition: var(--transition);
}

.menu-toggle.is-active .bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.is-active .bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-active .bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-only {
  display: none;
}

@media (max-width: 900px) {
  .mobile-only {
    display: block;
  }
}

/* --- FOOTER --- */
footer {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid var(--color-ghost-silver);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* --- MASONRY GALLERY (AI Imagery) --- */
.masonry-grid {
  column-count: 3;
  column-gap: 1.5rem;
  padding-bottom: 4rem;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 1.5rem;
  position: relative;
  cursor: pointer;
  border: 1px solid var(--color-ghost-silver);
  padding: 0.5rem;
  background: var(--color-surface);
  transition: var(--transition);
  border-radius: 4px;
}

.masonry-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 20px rgba(0, 127, 255, 0.2);
}

.masonry-item img {
  width: 100%;
  display: block;
  border-radius: 2px;
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 900px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(18, 18, 18, 0.95);
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
    gap: 1.5rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 999;
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .navbar .btn-primary:not(.mobile-only-btn) {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }
  
  .masonry-grid {
    column-count: 2;
  }
}

/* --- LIGHTBOX OVERLAY (Integrated) --- */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(18, 18, 18, 0.95);
  backdrop-filter: blur(5px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  position: relative;
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.lightbox-overlay.active .lightbox-content {
  transform: scale(1);
}

.lightbox-content img {
  max-width: 100%;
  max-height: 90vh;
  display: block;
  border: 2px solid var(--color-ghost-silver);
  border-radius: 4px;
  box-shadow: 0 0 40px rgba(0, 127, 255, 0.2);
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: var(--color-text);
  font-size: 2rem;
  cursor: pointer;
  font-family: sans-serif;
  transition: color 0.3s ease;
}

.lightbox-close:hover {
  color: var(--color-primary);
}

.section-header-wrapper {
  scroll-margin-top: 90px;
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .video-grid {
    grid-template-columns: 1fr;
  }
  
  .masonry-grid {
    column-count: 1;
  }
  
  .about-contact {
    flex-direction: column;
  }
}