/* ============================================
   LAYOUT
   Header, Footer, Navigation, Grids
   ============================================ */

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, 0.95);
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

@media (max-width: 768px) {
  .nav {
    height: var(--header-height-mobile);
  }
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-accent);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-primary-700);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.logo:hover {
  color: var(--color-primary-800);
}

.logo__text {
  letter-spacing: var(--tracking-tight);
}

/* Nav Menu */
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  position: relative;
  padding: var(--space-2) 0;
  font-family: var(--font-accent);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-neutral-700);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary-600);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.nav__link:hover {
  color: var(--color-primary-700);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__link--cta {
  padding: var(--space-2) var(--space-5);
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-gold-light));
  color: white;
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Mobile Toggle (Hamburger) */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--color-primary-700);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.nav__toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Mobile Menu */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: var(--glass-blur);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    transform: translateX(-100%);
    transition: transform var(--duration-normal) var(--ease-out-expo);
  }

  .nav__menu.active {
    transform: translateX(0);
  }

  .nav__link {
    font-size: var(--text-xl);
  }
}

/* Body scroll lock when menu is open */
body.menu-open {
  overflow: hidden;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--color-neutral-900);
  color: var(--color-neutral-300);
  padding: var(--space-16) 0 var(--space-6);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer__col h3,
.footer__col h4 {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: white;
  margin-bottom: var(--space-4);
}

.footer__col p,
.footer__col a {
  color: var(--color-neutral-400);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-2);
}

.footer__col a:hover {
  color: var(--color-primary-400);
}

.footer__col ul {
  list-style: none;
  padding: 0;
}

.footer__col ul li {
  margin-bottom: var(--space-2);
}

.footer__bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-neutral-700);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
}

@media (max-width: 768px) {
  .footer {
    padding: var(--space-10) 0 var(--space-4);
  }

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

/* ============================================
   GRID LAYOUTS
   ============================================ */

/* Auto-responsive Grid */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

/* 2 Columns */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: stretch;
}

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

/* 3 Columns */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: stretch;
}

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

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

/* 4 Columns */
.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

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

/* Flexible Grid */
.grid {
  display: grid;
  gap: var(--space-8);
}

/* ============================================
   SECTION LAYOUTS
   ============================================ */

/* Section Title */
.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-neutral-900);
  text-align: center;
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-neutral-600);
  text-align: center;
  margin-bottom: var(--space-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Section with Background */
.section-bg {
  background-color: var(--color-neutral-50);
}

.section-primary {
  background: linear-gradient(135deg, var(--color-primary-100), var(--color-primary-50));
}

/* ============================================
   CONTENT LAYOUTS
   ============================================ */

/* Two Column Layout */
.two-column {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

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

  .two-column--reverse {
    direction: rtl;
  }

  .two-column--reverse > * {
    direction: ltr;
  }
}

/* Content with Sidebar */
.content-sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .content-sidebar {
    grid-template-columns: 1fr 300px;
  }
}

/* ============================================
   SPACING UTILITIES
   ============================================ */

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-10 { margin-top: var(--space-10); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-10 { margin-bottom: var(--space-10); }

.pt-0 { padding-top: 0; }
.pt-2 { padding-top: var(--space-2); }
.pt-4 { padding-top: var(--space-4); }
.pt-6 { padding-top: var(--space-6); }
.pt-8 { padding-top: var(--space-8); }

.pb-0 { padding-bottom: 0; }
.pb-2 { padding-bottom: var(--space-2); }
.pb-4 { padding-bottom: var(--space-4); }
.pb-6 { padding-bottom: var(--space-6); }
.pb-8 { padding-bottom: var(--space-8); }

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 768px) {
  .hide-mobile {
    display: none !important;
  }
}

@media (min-width: 769px) {
  .hide-desktop {
    display: none !important;
  }
}

/* Text Alignment */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

@media (max-width: 768px) {
  .text-center-mobile {
    text-align: center;
  }
}

/* ============================================
   CONTAINER UTILITIES
   ============================================ */

.container--centered {
  max-width: 900px;
  margin: 0 auto;
}