/* ============================================================
   LAYOUT — Nav, Sections, Container, Grid, Footer
   ============================================================ */

/* ---- Scroll progress ---- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--accent);
  z-index: 1000;
  transition: width 80ms linear;
  box-shadow: 0 0 8px var(--accent);
}

/* ---- Canvas background ---- */
#scene-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    transparent 30%,
    rgba(5, 8, 15, 0.55) 70%,
    rgba(5, 8, 15, 0.88) 100%
  );
}

[data-theme="light"] .vignette {
  background: radial-gradient(
    ellipse at center,
    transparent 30%,
    rgba(238, 243, 250, 0.45) 70%,
    rgba(238, 243, 250, 0.80) 100%
  );
}

/* ---- Container ---- */
.container {
  width: min(var(--container-max), 100% - 48px);
  margin-inline: auto;
}

/* ---- NAV ---- */
#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 900;
  background: var(--bg-nav);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  transition: background var(--duration-mid) var(--ease-in-out),
              border-color var(--duration-mid) var(--ease-in-out);
}

#main-nav.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

.nav-logo:hover .nav-logo-mark {
  background: var(--accent-light);
  transform: rotate(45deg);
}

.nav-logo-text {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
}

.nav-links a {
  font-size: 13px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-mid) var(--ease-out);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-ghost {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  background: transparent;
  transition: border-color var(--duration-fast),
              color var(--duration-fast),
              background var(--duration-fast);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.lang-divider { opacity: 0.4; }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 14px;
  transition: border-color var(--duration-fast), color var(--duration-fast);
}

.btn-icon:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  font-weight: 600;
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-lg {
  padding: 13px 28px;
  font-size: 14px;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  margin-left: auto;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--duration-mid) var(--ease-out),
              opacity var(--duration-mid) var(--ease-out);
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-secondary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--duration-fast);
}

.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover { color: var(--accent); }

/* ---- Main content sits above canvas ---- */
main, footer {
  position: relative;
  z-index: 2;
}

/* ---- Sections ---- */
section {
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
  position: relative;
}

#hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--nav-height) + 32px);
}

/* ---- Section typography ---- */
.section-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.kicker-symbol {
  font-size: 9px;
  opacity: 0.75;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.5vw, 42px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-header {
  margin-bottom: 48px;
}

/* ---- Hero layout ---- */
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: center;
}

.hero-content { max-width: 680px; }

/* ---- Services grid ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 80px;
}

/* ---- Projects list ---- */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 80px;
}

/* ---- Split sections ---- */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}

.split-section:last-child { margin-bottom: 0; }

/* ---- Lead magnet ---- */
.lead-magnet {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 56px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin-bottom: 80px;
}

/* ---- Testimonial ---- */
.testimonial {
  padding: 32px;
  border-left: 2px solid var(--accent);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* ---- CTA contact ---- */
.cta-center {
  max-width: 720px;
  margin-inline: auto;
  text-align: center;
}

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  padding-top: 64px;
  padding-bottom: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: 20px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* ============================================================
   RESPONSIVE — 900px
   ============================================================ */
@media (max-width: 900px) {
  :root { --section-pad: clamp(48px, 8vw, 80px); }

  .nav-links, .nav-actions .btn-primary { display: none; }
  .nav-hamburger { display: flex; }
  .nav-actions { gap: 8px; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual { order: -1; max-width: 280px; margin-inline: auto; }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .split-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .lead-magnet {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 36px 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer-brand { grid-column: span 2; }
}

/* ============================================================
   RESPONSIVE — 500px
   ============================================================ */
@media (max-width: 500px) {
  .container { width: calc(100% - 32px); }

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

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

  .footer-brand { grid-column: span 1; }

  .footer-bar {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .hero-form-row {
    flex-direction: column;
  }

  .hero-form-row .btn-primary {
    width: 100%;
    justify-content: center;
  }
}