:root {
  --black:    #040608;
  --dark:     #0d1117;
  --card:     #131a22;
  --steel:    #3d9bd4;
  --steel-dim:#1e5a82;
  --silver:   #c8d8e8;
  --silver-dim:#6080a0;
  --white:    #ffffff;
  --forge:    #e06a1a;

  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans:  'Inter', system-ui, sans-serif;
  --font-mono:  'Roboto Mono', 'Courier New', monospace;

  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 2px;
  --container: 1200px;
  --section-gap: 7rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--dark); color: var(--silver); line-height: 1.7; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===== TYPOGRAPHY ===== */
.section-eyebrow { display: block; font-size: 0.68rem; font-weight: 600; letter-spacing: 0.3em; text-transform: uppercase; color: var(--steel); margin-bottom: 0.75rem; font-family: var(--font-mono); }
.section-title { font-family: var(--font-sans); font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; color: var(--white); line-height: 1.1; letter-spacing: -0.02em; text-transform: uppercase; }
.steel-divider { width: 40px; height: 3px; background: var(--steel); margin: 1.25rem auto 0; }
.steel-divider.align-left { margin-left: 0; }

/* ===== LAYOUT ===== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: var(--section-gap) 0; }
.section-dark { background: var(--black); }
.section-header { text-align: center; margin-bottom: 4rem; }

/* ===== ANIMATION ===== */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.65s ease, transform 0.65s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== BUTTON ===== */
.btn-primary { display: inline-block; padding: 0.95rem 2.5rem; border: 1px solid var(--steel); color: var(--steel); font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; border-radius: var(--radius); transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition); }
.btn-primary:hover { background: var(--steel); color: var(--black); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(61,155,212,0.4); }

/* ===== NAVBAR ===== */
#navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 1.25rem 0; transition: background var(--transition), padding var(--transition), border-color var(--transition); }
#navbar.scrolled { background: rgba(4,6,8,0.97); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); padding: 0.75rem 0; border-bottom: 1px solid rgba(61,155,212,0.25); }
.nav-inner { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; flex-direction: column; line-height: 1; gap: 2px; }
.logo-drh { font-family: var(--font-sans); font-size: 1.5rem; font-weight: 900; color: var(--steel); letter-spacing: 0.06em; text-transform: uppercase; line-height: 1; }
.logo-kovo { font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--silver-dim); }
.nav-links { display: flex; gap: 2.5rem; align-items: center; }
.nav-links a { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--silver-dim); transition: color var(--transition); position: relative; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; right: 0; height: 1px; background: var(--steel); transform: scaleX(0); transition: transform var(--transition); transform-origin: left; }
.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-cta { border: 1px solid var(--steel) !important; padding: 0.5rem 1.3rem !important; border-radius: var(--radius); color: var(--steel) !important; }
.nav-cta:hover { background: var(--steel) !important; color: var(--black) !important; }
.nav-cta::after { display: none !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--silver); transition: transform var(--transition), opacity var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== HERO ===== */
#hero { position: relative; height: 100svh; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; z-index: 0; transform: scale(1.04); transition: transform 10s ease; }
#hero:hover .hero-bg { transform: scale(1); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(4,6,8,0.82) 0%, rgba(4,6,8,0.55) 50%, rgba(4,6,8,0.78) 100%); z-index: 1; }
.hero-content { position: relative; z-index: 2; padding: 0 1.5rem; max-width: 900px; }
.hero-eyebrow { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.35em; text-transform: uppercase; color: var(--steel); margin-bottom: 1.5rem; display: block; }
.hero-name { font-family: var(--font-sans); font-weight: 900; text-transform: uppercase; line-height: 0.9; margin-bottom: 1.5rem; }
.hero-drh { font-size: clamp(5rem, 14vw, 10rem); color: var(--steel); display: block; letter-spacing: -0.02em; text-shadow: 0 0 80px rgba(61,155,212,0.5); }
.hero-kovo { font-size: clamp(3rem, 8vw, 6rem); color: var(--white); display: block; letter-spacing: 0.06em; }
.hero-tagline { font-family: var(--font-mono); font-size: clamp(0.78rem, 1.5vw, 0.92rem); font-weight: 400; color: var(--silver-dim); margin-bottom: 2.75rem; letter-spacing: 0.1em; text-transform: uppercase; }
.hero-scroll-hint { position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%); z-index: 2; animation: bounce 2.2s ease-in-out infinite; }
.scroll-arrow { display: block; width: 22px; height: 22px; border-right: 2px solid rgba(61,155,212,0.7); border-bottom: 2px solid rgba(61,155,212,0.7); transform: rotate(45deg); }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(9px); } }

/* ===== SERVICES ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(61,155,212,0.12); border: 1px solid rgba(61,155,212,0.12); }
.service-card { background: var(--card); padding: 2.5rem 2rem; transition: background var(--transition), transform var(--transition); position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--steel); transform: scaleX(0); transition: transform var(--transition); transform-origin: left; }
.service-card:hover { background: #1a2535; }
.service-card:hover::before { transform: scaleX(1); }
.service-num { font-family: var(--font-mono); font-size: 0.65rem; color: var(--steel); letter-spacing: 0.2em; margin-bottom: 1.5rem; display: block; }
.service-card h3 { font-family: var(--font-sans); font-size: 1.05rem; font-weight: 700; color: var(--white); margin-bottom: 0.6rem; text-transform: uppercase; letter-spacing: 0.04em; }
.service-card p { color: var(--silver-dim); font-size: 0.88rem; line-height: 1.65; }

/* ===== GALLERY / PROJECTS ===== */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; }
.project-item { position: relative; overflow: hidden; aspect-ratio: 4/3; cursor: pointer; background: var(--card); }
.project-item img { width: 100%; height: 100%; object-fit: cover; object-position: center; transition: transform 0.6s ease; filter: brightness(0.9); }
.project-item:hover img { transform: scale(1.06); filter: brightness(1); }
.project-overlay { position: absolute; inset: 0; background: transparent; display: flex; align-items: flex-end; padding: 1.5rem; transition: background var(--transition); }
.project-overlay-content { opacity: 0; transform: translateY(8px); transition: opacity var(--transition), transform var(--transition); }
.project-overlay-content h4 { font-family: var(--font-sans); font-size: 0.9rem; font-weight: 700; color: var(--white); text-transform: uppercase; letter-spacing: 0.06em; }
.project-item:hover .project-overlay { background: linear-gradient(to top, rgba(4,6,8,0.85) 0%, transparent 60%); }
.project-item:hover .project-overlay-content { opacity: 1; transform: translateY(0); }

/* LIGHTBOX */
.lightbox { display: none; position: fixed; inset: 0; z-index: 2000; background: rgba(0,0,0,0.97); align-items: center; justify-content: center; }
.lightbox.open { display: flex; }
#lightbox-img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: var(--radius); border: 1px solid rgba(61,155,212,0.2); }
.lightbox-close { position: absolute; top: 1.5rem; right: 2rem; background: none; border: none; color: var(--silver-dim); font-size: 2.8rem; cursor: pointer; line-height: 1; transition: color var(--transition); font-weight: 300; }
.lightbox-close:hover { color: var(--steel); }

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 2.5rem; }
.stat-item { border-left: 2px solid var(--steel); padding-left: 1.25rem; }
.stat-num { font-family: var(--font-sans); font-size: 2.2rem; font-weight: 900; color: var(--white); line-height: 1; }
.stat-label { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--silver-dim); margin-top: 0.3rem; }
.about-image { position: relative; }
.about-image img { width: 100%; border-radius: var(--radius); filter: brightness(0.9) contrast(1.05); }
.about-image-frame { position: absolute; bottom: -16px; right: -16px; width: 80px; height: 80px; border-right: 2px solid var(--steel); border-bottom: 2px solid var(--steel); pointer-events: none; }
.about-text p { color: var(--silver-dim); margin-bottom: 1.25rem; font-size: 0.95rem; }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 4rem; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 2rem; }
.contact-item { display: flex; align-items: flex-start; gap: 1.25rem; }
.contact-icon { width: 44px; height: 44px; border: 1px solid rgba(61,155,212,0.4); display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 1.1rem; }
.contact-item strong { display: block; font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--steel); margin-bottom: 0.3rem; font-weight: 600; }
.contact-item a, .contact-item p { color: var(--silver-dim); font-size: 0.95rem; }
.contact-item a:hover { color: var(--steel); }
.contact-btn { margin-top: 0.5rem; }
.contact-map iframe { border: 1px solid rgba(61,155,212,0.18) !important; filter: grayscale(0.4) brightness(0.75) hue-rotate(180deg); display: block; }

/* ===== FOOTER ===== */
footer { background: var(--black); border-top: 1px solid rgba(61,155,212,0.15); padding: 2.5rem 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-logo .logo-drh { font-size: 1.2rem; }
.footer-meta, .footer-copy { font-family: var(--font-mono); font-size: 0.7rem; color: var(--silver-dim); letter-spacing: 0.08em; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .about-image-frame { display: none; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-inner { justify-content: center; text-align: center; }
}
@media (max-width: 640px) {
  :root { --section-gap: 4.5rem; }
  .services-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: rgba(4,6,8,0.99); padding: 1.5rem 1.5rem 2rem; gap: 1.4rem; border-top: 1px solid rgba(61,155,212,0.2); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero-drh { font-size: clamp(4rem, 20vw, 7rem); }
  .hero-kovo { font-size: clamp(2.2rem, 10vw, 4rem); }
}