/**
 * IRCTC Modern Web Redesign - Animations & Micro-Interactions
 * Modern CSS Standards: @starting-style, transition-behavior: allow-discrete, prefers-reduced-motion
 */

/* ==========================================================================
   1. MODERN MODAL & DRAWER TRANSITIONS (.is-open & .is-closing State Classes)
   ========================================================================== */
.booking-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(12, 35, 64, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.28s ease, visibility 0.28s ease;
  will-change: opacity;
}
.booking-drawer-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.booking-drawer-overlay.is-closing {
  opacity: 0;
  visibility: visible;
  pointer-events: none;
}

.booking-drawer {
  transform: translate3d(100%, 0, 0);
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}
.booking-drawer-overlay.is-open .booking-drawer {
  transform: translate3d(0, 0, 0);
}
.booking-drawer-overlay.is-closing .booking-drawer {
  transform: translate3d(100%, 0, 0);
}

.coach-visualizer-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  will-change: opacity;
}
.coach-visualizer-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.coach-visualizer-modal.is-closing {
  opacity: 0;
  visibility: visible;
  pointer-events: none;
}

.coach-modal-content {
  transform: scale(0.96) translate3d(0, 12px, 0);
  opacity: 0;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  will-change: transform, opacity;
}
.coach-visualizer-modal.is-open .coach-modal-content {
  transform: scale(1) translate3d(0, 0, 0);
  opacity: 1;
}
.coach-visualizer-modal.is-closing .coach-modal-content {
  transform: scale(0.96) translate3d(0, 12px, 0);
  opacity: 0;
}

.capsule-modal-overlay {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.capsule-modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.capsule-modal-overlay.is-closing {
  opacity: 0;
  visibility: visible;
  pointer-events: none;
}

.capsule-modal-panel {
  transform: scale(0.96) translate3d(0, 10px, 0);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}
.capsule-modal-overlay.is-open .capsule-modal-panel {
  transform: scale(1) translate3d(0, 0, 0);
  opacity: 1;
}
.capsule-modal-overlay.is-closing .capsule-modal-panel {
  transform: scale(0.96) translate3d(0, 10px, 0);
  opacity: 0;
}

/* Capsule Dropdown & Sub-Flyout Menus (@starting-style & allow-discrete) */
.capsule-dropdown-menu {
  display: none;
  opacity: 0;
  transform: scale(0.97) translateY(-6px);
  transition: opacity 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              display 0.22s allow-discrete;
}

.capsule-dropdown-wrap.open .capsule-dropdown-menu {
  display: flex;
  opacity: 1;
  transform: scale(1) translateY(0);
}

@starting-style {
  .capsule-dropdown-wrap.open .capsule-dropdown-menu {
    opacity: 0;
    transform: scale(0.97) translateY(-6px);
  }
}

.dropdown-flyout-sublist {
  display: none;
  opacity: 0;
  transform: scale(0.97) translateX(-6px);
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              display 0.2s allow-discrete;
}

.dropdown-subitem-wrap:hover .dropdown-flyout-sublist,
.dropdown-subitem-wrap.flyout-open .dropdown-flyout-sublist,
.dropdown-subitem-wrap:focus-within .dropdown-flyout-sublist {
  display: flex;
  opacity: 1;
  transform: scale(1) translateX(0);
}

@starting-style {
  .dropdown-subitem-wrap:hover .dropdown-flyout-sublist,
  .dropdown-subitem-wrap.flyout-open .dropdown-flyout-sublist,
  .dropdown-subitem-wrap:focus-within .dropdown-flyout-sublist {
    opacity: 0;
    transform: scale(0.97) translateX(-6px);
  }
}

/* Staggered micro-transitions for items on reveal */
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item,
.dropdown-subitem-wrap:hover .dropdown-flyout-sublist .flyout-item,
.dropdown-subitem-wrap.flyout-open .dropdown-flyout-sublist .flyout-item,
.dropdown-subitem-wrap:focus-within .dropdown-flyout-sublist .flyout-item {
  animation: dropdownItemReveal 0.2s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes dropdownItemReveal {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(1),
.dropdown-flyout-sublist .flyout-item:nth-child(1) { animation-delay: 0.015s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(2),
.dropdown-flyout-sublist .flyout-item:nth-child(2) { animation-delay: 0.03s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(3),
.dropdown-flyout-sublist .flyout-item:nth-child(3) { animation-delay: 0.045s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(4),
.dropdown-flyout-sublist .flyout-item:nth-child(4) { animation-delay: 0.06s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(5),
.dropdown-flyout-sublist .flyout-item:nth-child(5) { animation-delay: 0.075s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(6),
.dropdown-flyout-sublist .flyout-item:nth-child(6) { animation-delay: 0.09s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(7),
.dropdown-flyout-sublist .flyout-item:nth-child(7) { animation-delay: 0.105s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(8),
.dropdown-flyout-sublist .flyout-item:nth-child(8) { animation-delay: 0.12s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(9),
.dropdown-flyout-sublist .flyout-item:nth-child(9) { animation-delay: 0.135s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(10),
.dropdown-flyout-sublist .flyout-item:nth-child(10) { animation-delay: 0.15s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(11),
.dropdown-flyout-sublist .flyout-item:nth-child(11) { animation-delay: 0.165s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(12),
.dropdown-flyout-sublist .flyout-item:nth-child(12) { animation-delay: 0.18s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(13),
.dropdown-flyout-sublist .flyout-item:nth-child(13) { animation-delay: 0.195s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(14),
.dropdown-flyout-sublist .flyout-item:nth-child(14) { animation-delay: 0.21s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(15),
.dropdown-flyout-sublist .flyout-item:nth-child(15) { animation-delay: 0.225s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(16),
.dropdown-flyout-sublist .flyout-item:nth-child(16) { animation-delay: 0.24s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(17),
.dropdown-flyout-sublist .flyout-item:nth-child(17) { animation-delay: 0.255s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(18),
.dropdown-flyout-sublist .flyout-item:nth-child(18) { animation-delay: 0.27s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(19),
.dropdown-flyout-sublist .flyout-item:nth-child(19) { animation-delay: 0.285s; }
.capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item:nth-child(20),
.dropdown-flyout-sublist .flyout-item:nth-child(20) { animation-delay: 0.30s; }

/* ==========================================================================
   2. KEYFRAME ANIMATIONS & PULSES
   ========================================================================== */
@keyframes pulse-dot {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1.15);
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

@keyframes pulse-spark {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.25);
    opacity: 0.7;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleUp {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-fade-in {
  animation: fadeIn 0.35s ease forwards;
}

.animate-scale-up {
  animation: scaleUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.pulse-spark {
  display: inline-block;
  animation: pulse-spark 2s infinite ease-in-out;
}

/* ==========================================================================
   3. ACCESSIBILITY: PREFERS REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .booking-drawer {
    transform: none !important;
  }

  .coach-modal-content {
    transform: none !important;
  }

  .capsule-modal-panel {
    transform: none !important;
  }

  .swap-stations-btn.rotated {
    transform: none !important;
    border-color: var(--irctc-saffron-500) !important;
  }

  .pulse-spark,
  .clock-live-dot,
  .live-gps-pulse {
    animation: none !important;
  }

  .capsule-dropdown-menu,
  .dropdown-flyout-sublist {
    transform: none !important;
    transition: opacity 0.01s !important;
  }

  .capsule-dropdown-wrap.open .capsule-dropdown-menu .dropdown-list-item,
  .dropdown-flyout-sublist .flyout-item {
    animation: none !important;
  }

  .dropdown-list-item::before,
  .flyout-item::before,
  .d-icon-badge,
  .d-arrow {
    transition: none !important;
  }
}

/* ==========================================================================
   4. RESPONSIVE DESIGN BREAKPOINTS (Mobile 375px, Tablet 768px, Desktop 1440px)
   ========================================================================== */

/* Constrained Displays Tiered Wrapping for A+ Font Scaling (max-width: 1320px) */
@media (max-width: 1320px) {
  html[data-font-size="lg"] .header-container {
    flex-wrap: wrap !important;
    justify-content: space-between !important;
    gap: 10px !important;
  }
  html[data-font-size="lg"] #capsule-nav-container {
    order: 3 !important;
    width: 100% !important;
    max-width: 100% !important;
    justify-content: center !important;
    margin-top: 6px !important;
  }
}

/* Laptops (max-width: 1200px) */
@media (max-width: 1200px) {
  .header-container {
    gap: 12px;
  }
  .capsule-pill {
    padding: 3px 6px;
    gap: 2px;
  }
  .capsule-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
  .irctc-logo-wrapper {
    width: 140px;
    height: 44px;
  }
  .helpline-badge {
    padding: 5px 10px;
    font-size: 0.74rem;
  }
}

/* Tablets & Small Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
  .search-form-grid {
    grid-template-columns: 1fr 1fr;
  }
  .swap-button-container {
    grid-column: span 2;
    padding: 0;
    margin: -4px auto;
  }
  .search-form-grid .station-group {
    grid-column: span 1;
  }
  .search-form-grid .date-group,
  .search-form-grid .quota-group {
    grid-column: span 1;
  }
  .search-form-grid .submit-group {
    grid-column: span 2;
  }

  .tatkal-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .header-container {
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
  }
  #capsule-nav-container {
    order: 3;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    padding: 6px 0;
    justify-content: flex-start;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  #capsule-nav-container::-webkit-scrollbar {
    display: none;
  }
  .capsule-nav-bar {
    width: max-content;
    justify-content: flex-start;
  }
  .capsule-pill {
    white-space: nowrap;
  }
  .dropdown-flyout-sublist {
    position: static;
    margin-left: 12px;
    max-width: 100%;
    box-shadow: none;
    border-left: 2px solid var(--irctc-saffron-500);
  }
}

/* Tablets (max-width: 768px) */
@media (max-width: 768px) {
  .hero-motion-banner {
    height: 340px;
  }
  .hero-top-cluster {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .vande-bharat-badge-wrap {
    width: 200px;
    height: 54px;
  }
  .hero-bottom-cluster {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-feature-tags {
    display: none;
  }

  .search-widget-card {
    padding: 18px;
    margin-top: -24px;
  }
  .search-form-grid {
    grid-template-columns: 1fr;
  }
  .swap-button-container {
    grid-column: span 1;
    margin: 4px auto;
  }
  .search-form-grid .station-group,
  .search-form-grid .date-group,
  .search-form-grid .quota-group,
  .search-form-grid .submit-group {
    grid-column: span 1;
  }

  .header-nav {
    display: none; /* Mobile navigation toggle */
  }

  /* Official Redesigned 2-Row Search & Quick Utilities (v4.5) */
  .irctc-unified-search-card {
    padding: 16px !important;
  }
  .unified-search-layout {
    flex-direction: column;
    gap: 16px;
  }
  .search-vertical-divider {
    display: none;
  }
  .quick-utilities-column {
    min-width: 100%;
    flex-direction: row;
    gap: 10px;
  }
  .quick-utilities-column .utility-action-card {
    flex: 1;
  }
  .search-row-1 {
    grid-template-columns: 1fr auto 1fr;
  }
  .search-row-1 .field-date {
    grid-column: 1 / -1;
  }
  .search-row-2 {
    grid-template-columns: 1fr 1fr;
  }
  .search-row-2 .btn-search-trains-primary {
    grid-column: 1 / -1;
  }

  .train-card-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .train-quick-actions {
    width: 100%;
    justify-content: space-between;
  }

  .train-schedule-strip {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
  .schedule-point.destination {
    align-items: center;
  }

  .train-card-footer {
    flex-direction: column;
    align-items: flex-start;
  }
  .booking-cta-cluster {
    width: 100%;
    justify-content: space-between;
  }

  .payment-tabs-layout {
    grid-template-columns: 1fr;
  }

  .ers-journey-table {
    grid-template-columns: 1fr;
  }
  .ers-pnr-security-row {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile Phones (max-width: 480px) */
@media (max-width: 480px) {
  .gov-top-strip {
    padding: 4px 12px;
  }
  .gov-strip-container {
    flex-direction: column;
    align-items: flex-start;
  }
  .portal-main-header {
    padding: 10px 12px;
  }
  .branding-cluster {
    gap: 10px;
  }
  .irctc-logo-wrapper {
    width: 130px;
    height: 40px;
  }
  .header-actions {
    gap: 8px;
  }
  .helpline-badge {
    padding: 4px 8px;
    font-size: 0.72rem;
  }
  .btn-user-login {
    padding: 6px 14px 8px 14px;
    font-size: 0.8rem;
  }
  .page-container {
    padding: 12px;
  }

  .matrix-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .slot-content {
    flex-direction: column;
    align-items: flex-start;
  }
  .slot-countdown-box {
    width: 100%;
    text-align: left;
  }
  .countdown-digits {
    font-size: 1.05rem;
  }

  .passenger-grid-inputs {
    grid-template-columns: 1fr;
  }
  .passenger-grid-inputs .span-2 {
    grid-column: span 1;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* Official Search Bar & Login Dialog Mobile Overrides (v4.5) */
  .quick-utilities-column {
    flex-direction: column;
  }
  .search-row-1 {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .station-swap-circle-btn {
    align-self: center;
    margin: -4px 0;
  }
  .search-row-2 {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .irctc-login-dialog {
    width: 94vw !important;
    max-width: 94vw !important;
  }
}