/* ==============================================================
   PREMIUM DESIGN SYSTEM — RegionExperts
   Additive layer: loaded AFTER all existing CSS.
   No existing rules are deleted — only overrides via cascade.
   ============================================================== */

/* ==============================================================
   1. PREMIUM TYPOGRAPHY
   ============================================================== */

h1, h2, h3, h4, h5, h6,
.page-header-title,
.page-banner-title,
.section-card-title,
.section-heading-title,
.card-header h3,
.card-header h4,
.stat-value,
.stat-number,
.cta-card-title,
.landing-hero-title,
.landing-section-title {
  font-family: var(--font-family-heading);
  letter-spacing: -0.025em;
}

h1 { font-size: 2.25rem; font-weight: 800; line-height: 1.15; }
h2 { font-size: 1.75rem; font-weight: 700; line-height: 1.2; }
h3 { font-size: 1.375rem; font-weight: 700; line-height: 1.25; }
h4 { font-size: 1.125rem; font-weight: 600; line-height: 1.3; }

body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Premium text helpers */
.text-gradient-premium {
  background: var(--gradient-premium);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==============================================================
   2. PREMIUM CARD SYSTEM
   ============================================================== */

.card,
.section-card {
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.03);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover,
.section-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06), 0 12px 28px rgba(0, 0, 0, 0.08);
}

.card-elevated {
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.06);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-elevated:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06), 0 16px 40px rgba(0, 0, 0, 0.1);
}

/* Glass card variant */
.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Premium accent top */
.accent-top::before {
  height: 3px;
  background: var(--gradient-premium);
}

/* Card header title typography */
.card-header {
  padding: var(--spacing-4) var(--spacing-5);
}

.section-card-title {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-card-header-icon {
  border-radius: 10px;
  background: var(--color-primary-50);
  transition: transform 0.3s ease, background 0.3s ease;
}

.section-card:hover .section-card-header-icon {
  transform: scale(1.08);
  background: var(--color-primary-100);
}

/* ==============================================================
   3. PREMIUM BUTTON SYSTEM
   ============================================================== */

.btn {
  font-family: var(--font-family-heading);
  font-weight: 600;
  letter-spacing: -0.01em;
  border-radius: var(--radius-lg);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-premium);
  border: none;
  box-shadow: 0 2px 8px rgba(250, 79, 85, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(250, 79, 85, 0.35);
  filter: brightness(1.05);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 1px 4px rgba(250, 79, 85, 0.25);
}

.btn-secondary {
  border: 1.5px solid var(--color-gray-200);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary:hover {
  border-color: var(--color-primary-200);
  background: var(--color-primary-50);
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(250, 79, 85, 0.1);
}

.btn-ghost:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

/* Button icon animation */
.btn svg,
.btn .btn-icon {
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover svg,
.btn:hover .btn-icon {
  transform: translateX(2px);
}

/* Premium focus ring */
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(250, 79, 85, 0.12);
}

/* ==============================================================
   4. PREMIUM FORM INPUTS
   ============================================================== */

.input,
input[type="text"]:not(.search-input):not(.landing-nav-search-input):not(.products-search-input):not(.al-search-input):not([class*="search"]),
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="number"],
input[type="search"]:not([class*="search"]),
input[type="url"],
.select,
select,
textarea {
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
  background: var(--color-white);
}

.input:hover,
input[type="text"]:not([class*="search"]):hover,
input[type="email"]:hover,
input[type="tel"]:hover,
select:hover,
textarea:hover {
  border-color: var(--color-gray-300);
}

.input:focus,
input[type="text"]:not([class*="search"]):focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(250, 79, 85, 0.1), 0 1px 2px rgba(0, 0, 0, 0.04);
  outline: none;
}

/* Error shake animation */
@keyframes inputShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(3px); }
}

.input-error,
.input.error,
input.error {
  border-color: var(--color-error) !important;
  animation: inputShake 0.4s ease-out;
}

/* Form labels */
label,
.form-label,
.input-label {
  font-family: var(--font-family-heading);
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: -0.01em;
  color: var(--color-gray-700);
}

/* ==============================================================
   5. PREMIUM TABLE SYSTEM
   ============================================================== */

.responsive-table thead th,
.data-table th {
  font-family: var(--font-family-heading);
  font-weight: 700;
  background: linear-gradient(180deg, var(--color-gray-50) 0%, rgba(249, 250, 251, 0.5) 100%);
  color: var(--color-gray-600);
}

.responsive-table tbody tr,
.data-table tbody tr {
  transition: background 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.responsive-table tbody tr:hover td,
.data-table tr:hover td {
  background: var(--color-primary-50);
}

.responsive-table tbody tr::after,
.data-table tbody tr::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--gradient-premium);
  transition: width 0.25s ease;
  border-radius: 0 2px 2px 0;
}

.responsive-table tbody tr:hover::after,
.data-table tbody tr:hover::after {
  width: 3px;
}

/* ==============================================================
   6. PREMIUM MODAL SYSTEM
   ============================================================== */

.modal-overlay {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background: rgba(0, 0, 0, 0.4);
}

@keyframes premiumModalIn {
  0% {
    opacity: 0;
    transform: translateY(20px) scale(0.96);
  }
  60% {
    transform: translateY(-4px) scale(1.01);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-content {
  animation: premiumModalIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-2xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 8px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

/* ==============================================================
   7. PREMIUM SIDEBAR (Admin/Provider/Vendor)
   ============================================================== */

.sidebar {
  background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
  border-right: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 2px 0 12px rgba(0, 0, 0, 0.03);
}

.sidebar-header {
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.sb-logo {
  font-family: var(--font-family-heading);
  font-weight: 800;
  background: var(--gradient-premium);
  color: var(--color-white);
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(250, 79, 85, 0.3);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
}

.sb-logo:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 14px rgba(250, 79, 85, 0.4);
}

.sb-brand {
  font-family: var(--font-family-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Nav items */
.nav-item {
  border-radius: var(--radius-lg);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.nav-item:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.nav-item.active {
  background: var(--color-primary-50);
  color: var(--color-primary);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--gradient-premium);
  border-radius: 0 4px 4px 0;
}

.nav-item .nav-icon {
  transition: transform 0.2s ease, color 0.2s ease;
}

.nav-item:hover .nav-icon {
  transform: scale(1.1);
  color: var(--color-primary);
}

/* Section labels */
.nav-section,
.sidebar-section {
  font-family: var(--font-family-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.65rem;
  color: var(--color-gray-400);
}

/* Sidebar footer */
.sidebar-footer {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.sidebar-footer .avatar,
.sidebar-footer .sb-avatar {
  border: 2px solid transparent;
  background-image: var(--gradient-premium);
  background-origin: border-box;
  background-clip: padding-box, border-box;
}

/* ==============================================================
   8. PREMIUM TOP NAVIGATION (Customer)
   ============================================================== */

.topnav,
#topnav {
  background: var(--color-white);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.topnav-brand,
.topnav-logo {
  font-family: var(--font-family-heading);
  font-weight: 700;
}

.topnav-link {
  font-family: var(--font-family-heading);
  font-weight: 500;
  position: relative;
  transition: color 0.2s ease;
}

.topnav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-premium);
  border-radius: 1px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.topnav-link:hover::after,
.topnav-link.active::after {
  width: 100%;
}

/* Search bar premium (non-topnav contexts; topnav search is styled in topnav.css) */
.search-input {
  border-radius: var(--radius-full);
  background: var(--color-gray-50);
  border: 1.5px solid var(--color-gray-200);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-input:focus {
  background: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(250, 79, 85, 0.1);
  width: 300px;
}

/* Cart badge pulse */
@keyframes badgePulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.cart-badge,
.cart-count,
#cartCount {
  animation: badgePulse 0.3s ease-out;
  background: var(--color-merlot-deep);
  color: var(--color-white);
  font-family: var(--font-family-heading);
  font-weight: 700;
}

/* Profile dropdown */
.topnav-dropdown,
.profile-dropdown {
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-xl);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
}

/* ==============================================================
   9. PREMIUM TOPBAR (Admin/Provider/Vendor)
   ============================================================== */

.topbar {
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.topbar-burger {
  border-radius: var(--radius-lg);
  transition: background 0.2s ease, transform 0.2s ease;
}

.topbar-burger:hover {
  background: var(--color-primary-50);
  transform: scale(1.05);
}

.topbar-btn {
  border-radius: var(--radius-lg);
  transition: all 0.2s ease;
}

.topbar-btn:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.notif-dot {
  background: var(--gradient-premium);
  box-shadow: 0 0 0 2px var(--color-white);
}

/* ==============================================================
   10. PREMIUM FOOTER
   ============================================================== */

.footer,
.site-footer,
footer {
  background: var(--gradient-dark);
}

.footer-section-title,
footer h3,
footer h4 {
  font-family: var(--font-family-heading);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.footer-link,
footer a {
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-link:hover,
footer a:hover {
  color: var(--color-primary-light);
  padding-left: 4px;
}

.social-link,
.footer-social a {
  transition: transform 0.2s ease, color 0.2s ease;
}

.social-link:hover,
.footer-social a:hover {
  transform: translateY(-2px) scale(1.1);
  color: var(--color-primary);
}

/* Footer top gradient accent */
.footer::before,
.site-footer::before {
  content: '';
  display: block;
  height: 3px;
  background: var(--gradient-premium);
}

/* ==============================================================
   11. PREMIUM FLASH MESSAGES / TOASTS
   ============================================================== */

@keyframes toastSlideIn {
  0% {
    opacity: 0;
    transform: translateX(40px) scale(0.96);
  }
  60% {
    transform: translateX(-4px) scale(1.01);
  }
  100% {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

.flash-message {
  animation: toastSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.06);
  font-family: var(--font-family-heading);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ==============================================================
   12. PREMIUM BADGES
   ============================================================== */

.badge,
.status-badge {
  font-family: var(--font-family-heading);
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  transition: transform 0.2s ease;
}

.badge:hover,
.status-badge:hover {
  transform: scale(1.03);
}

/* ==============================================================
   13. PREMIUM PAGE HEADER
   ============================================================== */

.page-header,
.page-header-bar {
  font-family: var(--font-family-heading);
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-gray-50) 100%);
}

.page-header-title {
  font-family: var(--font-family-heading);
  font-weight: 800;
  letter-spacing: -0.025em;
}

/* ==============================================================
   14. PREMIUM BREADCRUMBS
   ============================================================== */

.breadcrumbs a,
.breadcrumb-link {
  font-family: var(--font-family-heading);
  font-weight: 500;
  transition: color 0.2s ease;
}

.breadcrumbs a:hover,
.breadcrumb-link:hover {
  color: var(--color-primary);
}

/* ==============================================================
   15. PREMIUM PAGINATION
   ============================================================== */

.pagination-btn {
  font-family: var(--font-family-heading);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--color-primary-200);
  background: var(--color-primary-50);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.pagination-btn-active {
  background: var(--gradient-premium);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(250, 79, 85, 0.3);
}

/* ==============================================================
   16. PREMIUM ICON CIRCLES
   ============================================================== */

.icon-circle {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
}

.icon-circle:hover {
  transform: scale(1.08);
}

.icon-circle-primary {
  background: var(--color-primary-50);
  box-shadow: 0 2px 8px rgba(250, 79, 85, 0.12);
}

/* ==============================================================
   17. PREMIUM CTA CARD
   ============================================================== */

.cta-card {
  background: var(--gradient-premium);
  border-radius: var(--radius-2xl);
  box-shadow: 0 8px 32px rgba(250, 79, 85, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(250, 79, 85, 0.28);
}

.cta-card-title {
  font-family: var(--font-family-heading);
  font-weight: 800;
}

/* ==============================================================
   18. PREMIUM SKELETON LOADERS
   ============================================================== */

@keyframes premiumShimmer {
  0% { background-position: -600px 0; }
  100% { background-position: 600px 0; }
}

.skeleton {
  background: linear-gradient(90deg,
    var(--color-gray-100) 0%,
    var(--color-gray-50) 40%,
    var(--color-gray-100) 60%,
    var(--color-gray-100) 100%);
  background-size: 1200px 100%;
  animation: premiumShimmer 1.8s infinite linear;
  border-radius: var(--radius-lg);
}

/* ==============================================================
   19. SCROLL REVEAL ANIMATIONS
   ============================================================== */

@keyframes premiumFadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes premiumScaleIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes premiumSlideRight {
  from {
    opacity: 0;
    transform: translateX(-24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes premiumBlurIn {
  from {
    opacity: 0;
    filter: blur(8px);
  }
  to {
    opacity: 1;
    filter: blur(0);
  }
}

/* Scroll reveal classes — applied by premium-interactions.js */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays for reveal groups */
.reveal-delay-1 { transition-delay: 0.05s; }
.reveal-delay-2 { transition-delay: 0.1s; }
.reveal-delay-3 { transition-delay: 0.15s; }
.reveal-delay-4 { transition-delay: 0.2s; }
.reveal-delay-5 { transition-delay: 0.25s; }
.reveal-delay-6 { transition-delay: 0.3s; }

/* ==============================================================
   20. PREMIUM LOADING SPINNER
   ============================================================== */

.loading-spinner::after {
  border: 3px solid var(--color-primary-100);
  border-top-color: var(--color-primary);
  width: 36px;
  height: 36px;
}

/* ==============================================================
   21. PREMIUM STAT CARDS
   ============================================================== */

.stat-card,
.stats-card,
.dashboard-stat {
  border-radius: var(--radius-xl);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.03);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  position: relative;
}

.stat-card:hover,
.stats-card:hover,
.dashboard-stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06), 0 12px 28px rgba(0, 0, 0, 0.08);
}

.stat-card::after,
.stats-card::after,
.dashboard-stat::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-premium);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat-card:hover::after,
.stats-card:hover::after,
.dashboard-stat:hover::after {
  opacity: 1;
}

.stat-value,
.stat-number {
  font-family: var(--font-family-heading);
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 1.75rem;
}

/* ==============================================================
   22. PREMIUM RESPONSIVE OVERRIDES
   ============================================================== */

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }

  .card:hover,
  .section-card:hover,
  .card-elevated:hover {
    transform: none;
  }

  .card:active,
  .section-card:active,
  .card-elevated:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
  }

  /* Bottom sheet modal on mobile */
  @media (max-width: 640px) {
    .modal-content {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      max-width: 100%;
      border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
      max-height: 90vh;
      animation: premiumSheetUp 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
  }

  .btn {
    min-height: 48px;
  }

  .stat-value,
  .stat-number {
    font-size: 1.5rem;
  }
}

@keyframes premiumSheetUp {
  from {
    opacity: 0;
    transform: translateY(100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .flash-messages {
    left: var(--spacing-3);
    right: var(--spacing-3);
    top: var(--spacing-3);
  }

  .flash-message {
    max-width: 100%;
  }
}

/* ==============================================================
   23. PREMIUM SCROLLBAR
   ============================================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-50);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

/* Sidebar scrollbar */
.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-gray-200);
  border-radius: 2px;
}

/* ==============================================================
   24. PREMIUM SELECTION
   ============================================================== */

::selection {
  background: rgba(250, 79, 85, 0.15);
  color: var(--color-gray-900);
}

/* ==============================================================
   25. SMOOTH GLOBAL TRANSITIONS
   ============================================================== */

a,
button,
input,
select,
textarea {
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Premium page transition */
.page-transition {
  animation: premiumFadeUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==============================================================
   26. PREMIUM BACK TO TOP
   ============================================================== */

.back-to-top,
.btt {
  border-radius: var(--radius-xl);
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.back-to-top:hover,
.btt:hover {
  background: var(--gradient-premium);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(250, 79, 85, 0.3);
  transform: translateY(-2px);
}

/* ---- Page Loader ---- */
#page-loader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: linear-gradient(135deg, #0a1a4a 0%, #102a5e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#page-loader.pl-hidden {
  opacity: 0;
  visibility: hidden;
}
.pl-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  position: relative;
}
.pl-ring {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-top-color: #e53935;
  border-right-color: rgba(229, 57, 53, 0.4);
  animation: plSpin 0.9s linear infinite;
  position: absolute;
}
.pl-logo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e53935, #FA4F55);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  animation: plPulseGlow 1.5s ease-in-out infinite;
  position: relative;
}
.pl-brand {
  margin-top: 3.5rem;
  text-align: center;
}
.pl-brand-name {
  font-family: var(--font-family-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.08em;
  animation: plSweep 1s ease-out 0.3s both;
}
.pl-brand-sub {
  font-family: var(--font-family-heading);
  font-size: 0.75rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: plSweep 1s ease-out 0.5s both;
  margin-top: 0.25rem;
}
.pl-bar {
  width: 120px;
  height: 2px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  margin-top: 1.5rem;
  overflow: hidden;
  animation: plSweep 0.8s ease-out 0.6s both;
}
.pl-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #e53935, #FA4F55);
  border-radius: 2px;
  animation: plBarFill 1.2s ease-out 0.4s both;
}
.pl-text { display: none; }

@keyframes plSpin {
  to { transform: rotate(360deg); }
}
@keyframes plPulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.4), 0 8px 32px rgba(229, 57, 53, 0.4); }
  50% { box-shadow: 0 0 0 16px rgba(229, 57, 53, 0), 0 12px 40px rgba(229, 57, 53, 0.6); }
}
@keyframes plSweep {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes plBarFill {
  from { width: 0%; }
  to { width: 100%; }
}