/* ============================================
   LAYOUT
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}
.container-lg { max-width: var(--container-lg); }
.container-sm { max-width: var(--container-sm); }

.section { padding: var(--space-4xl) 0; }
.section-sm { padding: var(--space-3xl) 0; }
.section-lg { padding: var(--space-5xl) 0; }
.section-dark { background: var(--gradient-hero); color: var(--color-text-on-dark); }
.section-light { background: var(--gradient-section); }
.section-alt { background: var(--color-bg-section); }

/* Header */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-height);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
  background: transparent;
}
.header.scrolled {
  background: rgba(10,22,40,0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0,0,0,0.2);
  height: 70px;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--container-lg);
  margin: 0 auto; padding: 0 var(--space-xl);
}

/* Logo */
.logo { display: flex; align-items: center; gap: var(--space-sm); text-decoration: none; z-index: calc(var(--z-fixed)+1); }
.logo-icon {
  width: 42px; height: 42px;
  background: var(--gradient-accent); border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--transition-base);
}
.logo:hover .logo-icon { transform: rotate(-5deg) scale(1.05); }
.logo-icon svg { width: 24px; height: 24px; color: var(--color-white); }
.logo-text {
  font-family: var(--font-accent); font-size: 1.35rem;
  font-weight: var(--fw-bold); color: var(--color-white);
  letter-spacing: var(--ls-tight);
}
.logo-text span { color: var(--color-accent); }

/* Desktop Nav */
.nav-desktop { display: flex; align-items: center; gap: var(--space-xs); }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: var(--space-2xs);
  padding: 0.5rem 1rem; font-size: var(--fs-small); font-weight: var(--fw-medium);
  color: var(--color-text-on-dark); text-decoration: none;
  transition: all var(--transition-fast); border-radius: var(--radius-md); cursor: pointer;
}
.nav-link:hover { color: var(--color-accent); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--color-accent); }
.nav-link .dropdown-arrow { font-size: 0.65rem; transition: transform var(--transition-fast); }
.nav-item:hover .dropdown-arrow { transform: rotate(180deg); }

/* Dropdown */
.dropdown-menu {
  position: absolute; top: calc(100% + 8px); left: 50%;
  transform: translateX(-50%) translateY(10px); min-width: 260px;
  background: rgba(10,22,40,0.97); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-lg);
  padding: var(--space-xs); opacity: 0; visibility: hidden;
  transition: all var(--transition-base); box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.nav-item:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown-link {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: 0.75rem 1rem; font-size: var(--fs-small);
  color: var(--color-text-on-dark); text-decoration: none;
  border-radius: var(--radius-md); transition: all var(--transition-fast); cursor: pointer;
}
.dropdown-link:hover { background: rgba(0,180,216,0.1); color: var(--color-accent); }
.dropdown-link .dd-icon {
  width: 36px; height: 36px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,180,216,0.1); color: var(--color-accent); font-size: 1rem; flex-shrink: 0;
}
.dropdown-link:hover .dd-icon { background: var(--color-accent); color: var(--color-white); }
.dropdown-link .dd-title { font-weight: var(--fw-medium); display: block; margin-bottom: 2px; }
.dropdown-link .dd-desc { font-size: var(--fs-xs); color: var(--color-text-light); display: block; }

/* Header Actions */
.header-actions { display: flex; align-items: center; gap: var(--space-md); }
.header-cta { padding: 0.5rem 1.25rem; font-size: var(--fs-small); }

/* Mobile Toggle */
.menu-toggle {
  display: none; flex-direction: column; justify-content: center; align-items: center;
  width: 44px; height: 44px; cursor: pointer; z-index: calc(var(--z-fixed)+10);
  background: none; border: none; padding: 0;
}
.menu-toggle span { width: 24px; height: 2px; background: var(--color-white); border-radius: 2px; transition: all var(--transition-base); }
.menu-toggle span:nth-child(1) { margin-bottom: 6px; }
.menu-toggle span:nth-child(3) { margin-top: 6px; }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,6px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; transform: translateX(-10px); }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-6px); }

/* Mobile Nav */
.nav-mobile {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(6,13,27,0.98); backdrop-filter: blur(30px);
  z-index: var(--z-fixed); padding: calc(var(--header-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
  overflow-y: auto; opacity: 0; transform: translateY(-20px); transition: all var(--transition-slow);
}
.nav-mobile.open { display: flex; flex-direction: column; opacity: 1; transform: translateY(0); }
.nav-mobile .mobile-nav-link {
  display: block; padding: var(--space-md) 0; font-size: var(--fs-h3); font-weight: var(--fw-semibold);
  color: var(--color-text-on-dark); text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.06); transition: color var(--transition-fast); cursor: pointer;
}
.nav-mobile .mobile-nav-link:hover { color: var(--color-accent); }
.nav-mobile .mobile-subnav { padding-left: var(--space-lg); }
.nav-mobile .mobile-subnav a {
  display: block; padding: var(--space-sm) 0; font-size: var(--fs-body);
  color: var(--color-text-light); text-decoration: none; cursor: pointer;
}
.nav-mobile .mobile-subnav a:hover { color: var(--color-accent); }
.mobile-lang-switcher { margin-top: auto; padding-top: var(--space-xl); display: flex; gap: var(--space-sm); }

/* Grid */
.grid { display: grid; gap: var(--space-xl); }
.grid-2 { grid-template-columns: repeat(2,1fr); }
.grid-3 { grid-template-columns: repeat(3,1fr); }
.grid-4 { grid-template-columns: repeat(4,1fr); }

/* Footer */
.footer { background: var(--gradient-dark); color: var(--color-text-on-dark); padding: var(--space-4xl) 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--space-3xl); padding-bottom: var(--space-3xl); border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand { max-width: 350px; }
.footer-brand p { color: var(--color-text-light); font-size: var(--fs-small); line-height: var(--lh-relaxed); margin-top: var(--space-md); }
.footer-heading { font-size: var(--fs-label); font-weight: var(--fw-semibold); text-transform: uppercase; letter-spacing: var(--ls-wider); color: var(--color-white); margin-bottom: var(--space-lg); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: var(--space-sm); }
.footer-links a { font-size: var(--fs-small); color: var(--color-text-light); text-decoration: none; transition: all var(--transition-fast); display: inline-flex; align-items: center; gap: var(--space-xs); cursor: pointer; }
.footer-links a:hover { color: var(--color-accent); transform: translateX(4px); }
.footer-contact-item { display: flex; align-items: center; gap: var(--space-sm); font-size: var(--fs-small); color: var(--color-text-light); margin-bottom: var(--space-sm); }
.footer-contact-item .icon { color: var(--color-accent); flex-shrink: 0; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-md); padding: var(--space-xl) 0; }
.footer-copyright { font-size: var(--fs-small); color: var(--color-text-light); }
.footer-legal { display: flex; gap: var(--space-lg); }
.footer-legal a { font-size: var(--fs-small); color: var(--color-text-light); text-decoration: none; transition: color var(--transition-fast); }
.footer-legal a:hover { color: var(--color-accent); }

/* Page Header (Inner) */
.page-header { padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl); background: var(--gradient-hero); color: var(--color-white); position: relative; overflow: hidden; }
.page-header::before { content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, rgba(0,180,216,0.08) 0%, transparent 70%); pointer-events: none; }
.page-header-content { position: relative; z-index: 1; }
.page-header h1 { color: var(--color-white); margin-bottom: var(--space-md); }
.page-header p { color: var(--color-text-light); font-size: var(--fs-body-lg); max-width: 600px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3xl); align-items: center; }
.two-col-text { max-width: 540px; }