/* ==========================================================================
   NEXUS STUDIO — LAYOUT & NAVIGATION
   Header, navigation, grid systems, hero templates, editorial footer
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Containers & Section Structure
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 4vw, 3.5rem);
  padding-right: clamp(1.25rem, 4vw, 3.5rem);
  position: relative;
  z-index: 1;
}

.container-narrow {
  max-width: var(--container-narrow);
}

.container-text {
  max-width: var(--container-text);
}

.section {
  padding-top: clamp(4rem, 8vw, 8rem);
  padding-bottom: clamp(4rem, 8vw, 8rem);
  position: relative;
  border-bottom: 1px solid var(--border-subtle);
}

.section-hero {
  padding-top: clamp(6rem, 12vw, 10rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.section-flush-bottom {
  padding-bottom: 0;
}

.section-flush-top {
  padding-top: 0;
}

.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.section-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background-color: currentColor;
}

/* --------------------------------------------------------------------------
   2. Header & Main Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: var(--bg-glass-strong);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.site-header.is-scrolled {
  height: 70px;
  background-color: var(--bg-glass);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

/* Brand Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.site-logo .logo-mark {
  width: 24px;
  height: 24px;
  background-color: var(--accent-primary);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  display: inline-block;
}

/* Primary Desktop Navigation */
.main-nav {
  display: none;
  align-items: center;
  gap: var(--space-2xl);
}

@media (min-width: 992px) {
  .main-nav {
    display: flex;
  }
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-primary);
}

/* Header Utilities & CTAs */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-status-badge {
  display: none;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
}

@media (min-width: 1200px) {
  .header-status-badge {
    display: inline-flex;
  }
}

.header-cta-btn {
  display: none;
}

@media (min-width: 768px) {
  .header-cta-btn {
    display: inline-flex;
  }
}

.menu-toggle-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  background: transparent;
  gap: 5px;
  cursor: pointer;
  z-index: 1002;
}

@media (min-width: 992px) {
  .menu-toggle-btn {
    display: none;
  }
}

.menu-toggle-line {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle-btn.is-active .menu-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle-btn.is-active .menu-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   3. Mobile Fullscreen Navigation Overlay
   -------------------------------------------------------------------------- */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--bg-primary);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(var(--header-height) + 2rem) clamp(1.5rem, 5vw, 3.5rem) 2.5rem;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease, visibility 0.4s;
}

.mobile-menu-overlay.is-active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.mobile-nav-link {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.mobile-nav-link .nav-num {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-primary);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--accent-primary);
  transform: translateX(10px);
}

.mobile-menu-footer {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-menu-contact {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   4. Editorial Grid & Asymmetric Layouts
   -------------------------------------------------------------------------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 4rem);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

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

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.grid-asymmetric-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (min-width: 992px) {
  .grid-asymmetric-hero {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.grid-asymmetric-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

@media (min-width: 992px) {
  .grid-asymmetric-split {
    grid-template-columns: 320px 1fr;
  }
}

/* Sticky sidebar column */
.sidebar-sticky {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  height: fit-content;
}

/* --------------------------------------------------------------------------
   5. Editorial Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-medium);
  padding-top: clamp(4rem, 8vw, 6rem);
  padding-bottom: var(--space-3xl);
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

@media (min-width: 992px) {
  .footer-top {
    grid-template-columns: 1.4fr 0.6fr 0.6fr 0.8fr;
  }
}

.footer-brand-col p {
  color: var(--text-secondary);
  margin-top: var(--space-md);
  margin-bottom: var(--space-lg);
  max-width: 380px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-lg);
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.footer-link:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

/* Timezone Clocks Bar */
.footer-clocks-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-2xl);
}

.studio-clock-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.clock-city {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

.clock-time {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.clock-status {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.footer-meta-actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.vault-trigger-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  transition: color var(--transition-fast);
}

.vault-trigger-btn:hover {
  color: var(--accent-primary);
}