/* ============================================
   FindParts — Layout System
   Mobile-first | Navbar top
   ============================================ */

/* ── BASE ── */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── APP LAYOUT ── */

.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── NAVBAR ── */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--navbar-bg);
  border-bottom: 1px solid var(--navbar-border);
  box-shadow: var(--navbar-shadow);
  z-index: var(--z-navbar);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-lg);
}

.navbar-inner {
  width: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

/* Logo */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  white-space: nowrap;
}

.navbar-brand:hover {
  color: var(--color-primary-hover);
}

/* Navigation links */
.navbar-nav {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-sm);
}

.navbar-nav a {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.navbar-nav a:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-hover);
}

.navbar-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-lighter);
}

/* CTA button in navbar */
.navbar-nav .nav-cta {
  color: var(--btn-primary-text);
  background: var(--btn-primary-bg);
}

.navbar-nav .nav-cta:hover {
  background: var(--btn-primary-bg-hover);
  color: var(--btn-primary-text);
}

/* User menu (avatar) */
.navbar-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.navbar-user:hover {
  background: var(--color-bg-hover);
}

.navbar-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  overflow: hidden;
}

.navbar-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Hamburger button (mobile only) */
.navbar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.navbar-toggle:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.navbar-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile dropdown menu */
.navbar-mobile-menu {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: var(--navbar-bg);
  border-bottom: 1px solid var(--navbar-border);
  box-shadow: var(--shadow-lg);
  z-index: calc(var(--z-navbar) - 1);
  padding: var(--spacing-sm);
}

.navbar-mobile-menu.open {
  display: block;
}

.navbar-mobile-menu a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.navbar-mobile-menu a:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-hover);
}

.navbar-mobile-menu a.active {
  color: var(--color-primary);
  background: var(--color-primary-lighter);
}

/* ── MAIN CONTENT ── */

.main-content {
  flex: 1;
  margin-top: 56px;
  padding: var(--spacing-xl) var(--spacing-lg);
  width: 100%;
}

.main-content .container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  width: 100%;
}

/* ── PAGE HEADER ── */

.page-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.page-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: 0;
  line-height: var(--line-height-tight);
}

.page-header p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin: 0;
}

.page-header-actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ── EMPTY STATE ── */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-xl);
  gap: var(--spacing-lg);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
}

.empty-state h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.empty-state p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin: 0;
  max-width: 400px;
}

/* ── LOADING ── */

.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-hover) 25%,
    var(--color-bg-active) 50%,
    var(--color-bg-hover) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── UTILITY: LAYOUT ── */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

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

.w-full { width: 100%; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ── UTILITY: VISIBILITY ── */

.hidden { display: none !important; }

.hidden-mobile {
  display: none;
}

/* ── DESKTOP ── */

@media (min-width: 768px) {
  .navbar {
    height: var(--navbar-height);
  }

  .navbar-nav {
    display: flex;
    align-items: center;
  }

  .navbar-toggle {
    display: none;
  }

  .navbar-mobile-menu {
    display: none !important;
  }

  .main-content {
    margin-top: var(--navbar-height);
    padding: var(--spacing-2xl) var(--spacing-2xl);
  }

  .page-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-2xl);
  }

  .hidden-mobile {
    display: initial;
  }

  .hidden-desktop {
    display: none !important;
  }
}

/* ── LARGE DESKTOP ── */

@media (min-width: 1200px) {
  .main-content {
    padding: var(--spacing-2xl) var(--spacing-3xl);
  }
}