/* =========================================
   MINDIESM — Header & Navigation (LIGHT THEME)
   ========================================= */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: all 0.5s var(--ease-out-expo);
}

.site-header.scrolled {
  background: rgba(253, 252, 251, 0.88);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.07), 0 1px 4px rgba(0, 0, 0, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 4rem);
  gap: var(--sp-8);
}

/* === LOGO === */
.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: var(--shadow-accent);
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s ease;
}

.logo:hover .logo-icon {
  transform: scale(1.08) rotate(-3deg);
  box-shadow: var(--shadow-accent-hover);
}

.logo-text {
  font-family: var(--font-primary);
  font-size: 1.65rem;
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  color: var(--text-primary);
}

/* === DESKTOP NAV === */
.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  background: rgba(255,255,255,0.65);
  backdrop-filter: var(--blur-sm);
  border: 1px solid var(--border-light);
  border-radius: var(--r-full);
  padding: 4px;
  box-shadow: var(--shadow-sm);
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.45rem 1rem;
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--text-tertiary);
  border-radius: var(--r-full);
  transition: all 0.25s ease;
  white-space: nowrap;
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-white);
  box-shadow: var(--shadow-xs);
}

.nav-link.active {
  color: var(--accent-violet);
  background: var(--accent-violet-mist);
  border: 1px solid var(--border-accent);
  font-weight: var(--fw-semibold);
}

/* === HEADER CTA === */
.header-cta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

.header-download-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.55rem 1.2rem;
  background: var(--accent-violet);
  color: white;
  border-radius: var(--r-full);
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  box-shadow: var(--shadow-accent);
  transition: all 0.3s var(--ease-out-expo);
}

.header-download-btn:hover {
  background: var(--accent-violet-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent-hover);
}

.header-download-btn svg {
  width: 14px;
  height: 14px;
  fill: white;
}

/* === MOBILE TOGGLE === */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  border-radius: var(--r-md);
  cursor: pointer;
  background: var(--glass-white);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-xs);
  transition: all 0.3s ease;
}

.menu-toggle:hover {
  background: var(--bg-white);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.35s var(--ease-out-expo);
  transform-origin: center;
}

.menu-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* === MOBILE MENU === */
.mobile-menu {
  position: fixed;
  inset: 0;
  top: var(--header-height);
  z-index: 998;
  background: rgba(253, 252, 251, 0.97);
  backdrop-filter: var(--blur-xl);
  -webkit-backdrop-filter: var(--blur-xl);
  display: flex;
  flex-direction: column;
  padding: var(--sp-6) clamp(1.25rem, 5vw, 4rem);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  border-top: 1px solid var(--border-light);
}

.mobile-menu.open { opacity: 1; visibility: visible; }

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  font-size: var(--text-xl);
  font-weight: var(--fw-medium);
  color: var(--text-tertiary);
  border-radius: var(--r-lg);
  transition: all 0.35s var(--ease-out-expo);
  border: 1px solid transparent;
  transform: translateX(-16px);
  opacity: 0;
}

.mobile-menu.open .mobile-nav-link {
  transform: translateX(0);
  opacity: 1;
}

.mobile-menu.open .mobile-nav-link:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.open .mobile-nav-link:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu.open .mobile-nav-link:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.open .mobile-nav-link:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu.open .mobile-nav-link:nth-child(5) { transition-delay: 0.25s; }
.mobile-menu.open .mobile-nav-link:nth-child(6) { transition-delay: 0.3s; }

.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--accent-violet);
  background: var(--accent-violet-mist);
  border-color: var(--border-accent);
}

.mobile-nav-chevron { width: 20px; height: 20px; opacity: 0.4; transition: transform 0.25s ease, opacity 0.25s ease; }
.mobile-nav-link:hover .mobile-nav-chevron { opacity: 0.8; transform: translateX(4px); }

.mobile-cta {
  margin-top: auto;
  padding-top: var(--sp-8);
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

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

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .header-cta .btn--secondary { display: none; }
  .menu-toggle { display: flex; }
}

@media (max-width: 480px) {
  .header-cta .header-download-btn { display: none; }
}