/**
 * nav.css — Navigation component styles for the v2 Public Site
 *
 * Two variants:
 *   Default (light) — used on landing, blog, pricing, demo, newsletter pages
 *   Dark hero (.nav.at-hero) — used on platform page over a dark hero
 *
 * Mobile hamburger panel is new (not in previews).
 * All colors use var(--token) references from tokens.css.
 *
 * Extracted from: landing.html, platform.html, blog.html
 */

/* ==================== BASE NAV ==================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(221, 221, 221, 0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 20px 40px; /* Figma: py:20px px:40px */
  transition:
    box-shadow var(--transition-medium),
    background var(--transition-medium);
}

.nav.scrolled {
  background: rgba(221, 221, 221, 0.95);
  box-shadow: 0 1px 30px rgba(0, 0, 0, 0.08);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 35px;
}

.nav-logo {
  width: 39px;
  height: 39px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 35px;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-dark);
  position: relative;
  white-space: nowrap;
}

/* Underline slide-in animation */
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--navy);
  transition: width var(--transition-medium);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Active state — underline stays visible */
.nav-links a.active {
  font-weight: 600;
}

.nav-links a.active::after {
  width: 100%;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-search {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0;
  background: #fff;
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-muted);
  overflow: hidden;
}

.nav-search-input {
  width: 120px;
  padding: 10px 0 10px 12px;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-primary);
  outline: none;
}

.nav-search-input::placeholder {
  color: var(--text-muted);
}

.nav-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px 10px 6px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-search-btn svg {
  width: 16px;
  height: 16px;
  opacity: 0.5;
}

/* ==================== DARK HERO VARIANT (.nav.at-hero) ==================== */
/* Used on platform page — nav starts transparent over dark hero background */

.nav.at-hero {
  background: transparent;
}

.nav.at-hero.scrolled {
  background: rgba(20, 28, 64, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 1px 30px rgba(0, 0, 0, 0.15);
}

.nav.at-hero .nav-links a {
  color: #fff;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.nav.at-hero .nav-links a:hover {
  opacity: 1;
}

.nav.at-hero .nav-links a::after {
  background: #fff;
}

.nav.at-hero .nav-search {
  background: rgba(255, 255, 255, 0.12);
}

.nav.at-hero .nav-search-input {
  color: #fff;
}

.nav.at-hero .nav-search-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.nav.at-hero .nav-search-btn svg {
  stroke: rgba(255, 255, 255, 0.7);
}

.nav.at-hero .btn-outline {
  border-color: #fff;
  color: #fff;
}

.nav.at-hero .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ==================== MOBILE HAMBURGER ==================== */

/* Hamburger button — hidden on desktop, shown below 768px */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  border-radius: 8px;
  transition: background var(--transition-fast);
}

.nav-hamburger:hover {
  background: rgba(35, 44, 91, 0.06);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition:
    transform var(--transition-medium),
    opacity var(--transition-fast);
}

.nav.at-hero .nav-hamburger span {
  background: #fff;
}

/* Overlay behind the mobile panel */
.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 200;
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.nav-backdrop.open {
  display: block;
  opacity: 1;
}

/* Slide-out panel from right */
.nav-mobile {
  position: fixed;
  top: 0;
  right: -320px;
  bottom: 0;
  width: 300px;
  background: var(--navy);
  z-index: 201;
  display: flex;
  flex-direction: column;
  padding: 24px 24px 40px;
  transition: right var(--transition-medium);
  overflow-y: auto;
}

.nav-mobile.open {
  right: 0;
}

.nav-mobile-close {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-bottom: 32px;
}

.nav-mobile-close button {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  color: #fff;
  transition: background var(--transition-fast);
}

.nav-mobile-close button:hover {
  background: rgba(255, 255, 255, 0.2);
}

.nav-mobile-close button svg {
  width: 20px;
  height: 20px;
}

.nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-mobile-links a {
  display: block;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  border-radius: 8px;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.nav-mobile-links a:hover,
.nav-mobile-links a.active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.nav-mobile-cta {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-mobile-cta .btn-primary {
  width: 100%;
  justify-content: center;
}

.nav-mobile-cta .btn-outline {
  width: 100%;
  justify-content: center;
  border-color: rgba(255, 255, 255, 0.4);
  color: rgba(255, 255, 255, 0.85);
}

.nav-mobile-cta .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}

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

@media (max-width: 768px) {
  .nav {
    padding: 14px var(--page-padding);
  }

  .nav-links,
  .nav-search {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }
}