/* ============================================================
   LAYOUT.CSS — Navbar, Footer, Grid, Container
   ============================================================ */

/* ══════════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--navbar-h);
  display: flex;
  align-items: center;
  z-index: var(--z-sticky);
  transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
  border-bottom: 1px solid transparent;
}

/* Transparent state (at top) */
.navbar.at-top {
  background: transparent;
}

/* Scrolled state (glass) */
.navbar.scrolled {
  background: rgba(13,13,26,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--glass-border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(245,245,255,0.88);
  box-shadow: 0 4px 24px rgba(108,60,228,0.1);
}

.navbar-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--sp-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

@media (min-width: 768px) {
  .navbar-inner { padding: 0 var(--sp-8); }
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-glow);
}

.nav-logo-text {
  font-size: var(--fs-md);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

/* Desktop nav links */
.nav-links {
  display: none;
  align-items: center;
  gap: var(--sp-1);
}

@media (min-width: 768px) {
  .nav-links { display: flex; }
}

.nav-link {
  padding: 8px 14px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 50%;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: 1px;
  transform: translateX(-50%);
  transition: width 0.25s ease;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 60%; }
.nav-link.active { color: var(--primary-light); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}

/* Theme toggle */
.theme-btn {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}
.theme-btn:hover {
  color: var(--secondary);
  border-color: var(--secondary);
  background: rgba(245,166,35,0.08);
}

/* Desktop CTA in nav */
.nav-cta {
  display: none;
}
@media (min-width: 768px) {
  .nav-cta { display: inline-flex; }
}

/* Hamburger button */
.hamburger {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  transition: var(--transition-fast);
  flex-shrink: 0;
}
.hamburger:hover { border-color: var(--primary); background: var(--bg-hover); }

@media (min-width: 768px) {
  .hamburger { display: none; }
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-sticky) + 10);
  background: var(--bg-body);
  display: flex;
  flex-direction: column;
  padding: var(--sp-6) var(--sp-5);
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
  overflow-y: auto;
}
.mobile-menu.open { transform: translateX(0); }

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-10);
}
.mobile-menu-close {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}
.mobile-menu-close:hover { color: var(--danger); border-color: var(--danger); }

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  flex: 1;
}
.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 14px var(--sp-4);
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
  border: 1px solid transparent;
}
.mobile-nav-link:hover, .mobile-nav-link.active {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  color: var(--primary-light);
}
.mobile-nav-link i {
  width: 24px;
  font-size: 18px;
  text-align: center;
  color: var(--primary);
}

.mobile-menu-footer {
  margin-top: var(--sp-8);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
}

/* ══════════════════════════════════════════
   BOTTOM NAVIGATION (Mobile)
   ══════════════════════════════════════════ */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--bottom-nav-h);
  background: var(--bg-surface);
  border-top: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-around;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: var(--z-sticky);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

@media (min-width: 768px) {
  .bottom-nav { display: none; }
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  flex: 1;
  padding: var(--sp-2) 0;
  cursor: pointer;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
  border: none;
  background: none;
  font-family: var(--font-main);
  min-height: 44px;
  justify-content: center;
}
.bottom-nav-item:hover { color: var(--text-secondary); }
.bottom-nav-item.active { color: var(--primary-light); }

.bottom-nav-item i {
  font-size: 20px;
  transition: transform 0.2s ease;
}
.bottom-nav-item.active i {
  transform: translateY(-2px);
  filter: drop-shadow(0 0 6px rgba(108,60,228,0.5));
}
.bottom-nav-item span {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* ══════════════════════════════════════════
   GRID SYSTEM
   ══════════════════════════════════════════ */
.grid { display: grid; gap: var(--sp-6); }

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.grid-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-auto-sm { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.grid-auto-lg { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
  .grid-2-mobile { grid-template-columns: repeat(2, 1fr); }
  .grid-auto { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}

.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.gap-5 { gap: var(--sp-5); }
.gap-6 { gap: var(--sp-6); }
.gap-8 { gap: var(--sp-8); }

/* ══════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════ */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--glass-border);
  padding: var(--sp-16) 0 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--sp-8);
  padding-bottom: var(--sp-10);
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
}

.footer-brand {}
.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
  text-decoration: none;
}
.footer-logo-text {
  font-size: var(--fs-lg);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: var(--sp-5);
}

.footer-socials {
  display: flex;
  gap: var(--sp-2);
}

.footer-col-title {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--sp-4);
}

.footer-links { display: flex; flex-direction: column; gap: var(--sp-2); }
.footer-link {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 3px 0;
}
.footer-link:hover { color: var(--primary-light); padding-left: 4px; }

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: var(--sp-3);
  line-height: 1.5;
}
.footer-contact-item i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 2px;
  flex-shrink: 0;
}
.footer-contact-item a { color: var(--text-muted); }
.footer-contact-item a:hover { color: var(--primary-light); }

/* Newsletter */
.footer-newsletter {
  border-top: 1px solid var(--border);
  padding: var(--sp-6) 0;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
}
.footer-newsletter-title {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.footer-newsletter-form {
  display: flex;
  gap: var(--sp-2);
  flex: 1;
  min-width: 280px;
}
.footer-newsletter-form input {
  flex: 1;
  padding: 10px 16px;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--fs-sm);
  font-family: var(--font-main);
}
.footer-newsletter-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(108,60,228,0.15);
  outline: none;
}

/* Footer bottom bar */
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: var(--sp-5) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
}
.footer-copyright {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}
.footer-policy-links {
  display: flex;
  gap: var(--sp-4);
}
.footer-policy-links a {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}
.footer-policy-links a:hover { color: var(--primary-light); }

/* ══════════════════════════════════════════
   PAGE WRAPPER — add padding for fixed navbar
   ══════════════════════════════════════════ */
.page-wrapper {
  padding-top: var(--navbar-h);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Add bottom padding for mobile bottom nav */
@media (max-width: 767px) {
  .page-wrapper {
    padding-bottom: var(--bottom-nav-h);
  }
}

/* ══════════════════════════════════════════
   BREADCRUMB
   ══════════════════════════════════════════ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-secondary); font-weight: 500; }

/* ══════════════════════════════════════════
   PAGE HERO MINI (sub-pages)
   ══════════════════════════════════════════ */
.page-hero {
  padding: var(--sp-12) 0 var(--sp-10);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(108,60,228,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero-title {
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-4xl));
  font-weight: 800;
  margin-bottom: var(--sp-3);
}
.page-hero-desc {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ══════════════════════════════════════════
   SIDEBAR LAYOUT (for sub-pages)
   ══════════════════════════════════════════ */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--sp-8);
  align-items: flex-start;
}

@media (max-width: 1024px) {
  .content-layout { grid-template-columns: 1fr; }
}

.content-sidebar {
  position: sticky;
  top: calc(var(--navbar-h) + var(--sp-4));
}

@media (max-width: 1024px) {
  .content-sidebar { position: static; }
}

.sidebar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--sp-5);
  margin-bottom: var(--sp-4);
}
.sidebar-title {
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: var(--sp-4);
}