/* ============================================================
   LAYOUT.CSS — Grid, Sections, Page Structure
   craftbyte.com
   ============================================================ */

/* --- Container --------------------------------------------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}
@media (min-width: 1280px) {
  .container { padding-inline: var(--space-16); }
}

/* --- Section Base ------------------------------------------ */
.section {
  padding-block: var(--space-24);
}

.section--lg {
  padding-block: var(--space-32);
}

.section__header {
  margin-bottom: var(--space-12);
}

.section__header h2 {
  margin-bottom: var(--space-4);
}

.section__header p {
  font-size: 1.0625rem;
}

/* --- Nav --------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  transition: background var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}

.nav__inner {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 768px) {
  .nav__inner { padding-inline: var(--space-8); }
}
@media (min-width: 1280px) {
  .nav__inner { padding-inline: var(--space-16); }
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__logo-bracket {
  color: var(--accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__link-cta {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  transition: background var(--transition), border-color var(--transition);
}

.nav__link-cta:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* Mobile hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav drawer */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(9, 9, 11, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-4);
  z-index: calc(var(--z-nav) - 1);
}

.nav__mobile.open { display: flex; }

.nav__mobile-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.nav__mobile-link:last-child { border-bottom: none; }
.nav__mobile-link:hover { color: var(--text-primary); }

@media (max-width: 767px) {
  .nav__links    { display: none; }
  .nav__hamburger { display: flex; }
}

/* --- Hero -------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  z-index: var(--z-canvas);
}

/* CSS fallback gradient shown when WebGL unavailable */
.hero__fallback {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(34, 211, 238, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 20% 80%, rgba(34, 211, 238, 0.04) 0%, transparent 60%);
  animation: pulse-bg 8s ease-in-out infinite alternate;
  z-index: var(--z-canvas);
  display: none;
}

@keyframes pulse-bg {
  from { opacity: 0.6; }
  to   { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .hero__fallback { animation: none; }
}

.hero__content {
  position: relative;
  z-index: var(--z-content);
  padding-top: var(--nav-height);
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-6);
  padding-block: var(--space-16);
}

@media (min-width: 768px) {
  .hero__content { padding-inline: var(--space-8); }
}
@media (min-width: 1280px) {
  .hero__content { padding-inline: var(--space-16); }
}

/* --- Grid utilities ---------------------------------------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); gap: var(--space-16); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* --- Divider ----------------------------------------------- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin-block: 0;
}

/* --- Scroll Reveal (GSAP sets this) ----------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}