/* Modern Design System Variables */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary-color: #0ea5e9;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-lighter: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Custom Select2 Styles - Modern */
.select2-container {
    width: 100% !important;
}

.select2-container .select2-selection--single {
    height: 56px !important;
    border: 2px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    transition: all var(--transition-normal);
    background: var(--bg-white) !important;
    outline: none !important;
}

.select2-container .select2-selection--single:hover {
    border-color: var(--primary-color) !important;
    background-color: var(--bg-light) !important;
}

.select2-container--default.select2-container--focus .select2-selection--single,
.select2-container--default.select2-container--open .select2-selection--single {
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 3px var(--primary-light) !important;
}

.select2-container--default .select2-results__option--highlighted {
    background-color: var(--primary-color) !important;
    color: white !important;
}

.select2-results__option {
    width: 100%;
    text-align: center;
    font-size: 1.5rem;
    padding: 1.2rem 1rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.select2-search__field {
    border: 2px solid var(--border-color) !important;
    border-radius: var(--radius-sm) !important;
    padding: 0.8rem !important;
    font-size: 1.4rem !important;
    outline: none !important;
}

.select2-search__field:focus {
    border-color: var(--primary-color) !important;
}

.select2-selection {
    font-size: 1.5rem;
    text-align: center;
}

.select2-results__option:hover {
    background-color: var(--primary-light) !important;
    color: var(--primary-color) !important;
}

.select2-selection__rendered {
    display: inline !important;
    font-size: 1rem !important;
    line-height: 56px !important;
    color: var(--text-dark) !important;
    padding: 0 1.6rem !important;
}

.select2-selection__placeholder {
    color: var(--text-light) !important;
}

.select2-dropdown {
    border: 2px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-lg) !important;
    margin-top: 0.5rem !important;
}

.select2-results__options {
    max-height: 300px !important;
    overflow-y: auto;
}

.custom-dropdown .select2-results__options {
    max-height: 250px;
    overflow-y: auto;
}

.box p {
    font-size: 1.5rem;
}

/* Modern Loading Overlay */
#loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95) 0%, rgba(139, 92, 246, 0.95) 100%);
    backdrop-filter: blur(10px);
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

#loading-container {
    text-align: center;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: scaleIn var(--transition-slow);
}

@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.loading-spinner {
    border: 5px solid rgba(255, 255, 255, 0.2);
    border-top: 5px solid white;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 0.8s linear infinite;
    margin-bottom: 1.5rem;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Modern Box Shadow */
.box-shadow {
    box-shadow: var(--shadow-lg);
}

/* Hero Section */
.hero-header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.6s ease-out;
}

.hero-title {
    color: black;
    -webkit-background-clip: text;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.6rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Book Section - Modern */
.book {
    margin-top: 8rem;
}

.book .row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding-right: 1.5rem;
}

.book .row .image {
    flex: 1 1 40rem;
    animation: fadeInRight 0.8s ease-out;
}

.book .row .image img {
    width: 100%;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.1));
    transition: transform var(--transition-slow);
}

.book .row .image img:hover {
    transform: scale(1.02);
}

/* Modern Form */
.modern-form {
    flex: 1 1 40rem;
    padding: 3rem;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    animation: fadeInLeft 0.8s ease-out;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.modern-form:hover {
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

.form-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Route Selector with Swap Button */
.route-selector-wrapper {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1rem;
    align-items: end;
    position: relative;
}

/* Swap Button - Modern and Stylish */
.swap-button {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    margin-bottom: 0.4rem;
    position: relative;
    overflow: hidden;
}

.swap-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width var(--transition-normal), height var(--transition-normal);
}

.swap-button:hover {
    transform: scale(1.1) rotate(180deg);
    box-shadow: var(--shadow-lg);
}

.swap-button:hover::before {
    width: 100%;
    height: 100%;
}

.swap-button:active {
    transform: scale(0.95) rotate(180deg);
}

.swap-button i {
    font-size: 1.8rem;
    transition: transform var(--transition-normal);
    position: relative;
    z-index: 1;
}

.swap-button.swapping {
    animation: swapRotate 0.6s ease-in-out;
}

@keyframes swapRotate {
    0%, 100% {
        transform: rotate(0deg) scale(1);
    }
    50% {
        transform: rotate(180deg) scale(1.2);
    }
}

/* Modern Input Groups */
.input-group-modern {
    position: relative;
    width: 100%;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.input-label i {
    color: var(--primary-color);
    font-size: 1.8rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Custom Select Styling */
.customSelect {
    width: 100%;
    padding: 1.4rem 1.6rem;
    font-size: 1.6rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-white);
    color: var(--text-dark);
    outline: none;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.customSelect:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-light);
}

.customSelect:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Modern Passenger Toggle Button */
.passenger-input-group {
    position: relative;
}

.passenger-toggle {
    width: 100%;
    padding: 1.4rem 1.6rem;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1.6rem;
    color: var(--text-dark);
}

.passenger-toggle-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.passenger-toggle:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-light);
}

.passenger-toggle:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    outline: none;
}

.passenger-toggle i:first-child {
    color: var(--primary-color);
    font-size: 1.8rem;
}

#passenger-summary {
    font-weight: 500;
}

.toggle-icon {
    color: var(--text-light);
    transition: transform var(--transition-normal);
    font-size: 1.4rem;
}

.passenger-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

/* Modern Counter Container */
.counter-modern {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 0.5rem);
    padding: 1.5rem;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 100;
    animation: slideDown var(--transition-normal) ease-out;
}

.counter-modern.show {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.counter-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.counter-item:last-of-type {
    border-bottom: none;
}

.counter-label-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.counter-label {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.counter-description {
    font-size: 1.3rem;
    color: var(--text-light);
}

.counter-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.count-button {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.4rem;
    box-shadow: var(--shadow-sm);
}

.count-button:hover {
    background: var(--primary-hover);
    transform: scale(1.15);
    box-shadow: var(--shadow-md);
}

.count-button:active {
    transform: scale(0.9);
}

.count-button:disabled {
    background: var(--text-lighter);
    cursor: not-allowed;
    opacity: 0.5;
}

.count-button:disabled:hover {
    transform: scale(1);
}

.count-display {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-dark);
    min-width: 35px;
    text-align: center;
}

/* Counter Footer with Done Button */
.counter-footer {
    padding-top: 1.5rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.counter-done-button {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all var(--transition-normal);
}

.counter-done-button:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.counter-done-button:active {
    transform: translateY(0);
}

/* Date Input */
.date-input {
    width: 100%;
    padding: 1.4rem 1.6rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1.6rem;
    color: var(--text-dark);
    background: var(--bg-white);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.date-input::placeholder {
    color: var(--text-light);
}

.date-input:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-light);
}

.date-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    outline: none;
}

/* Modern Submit Button */
.submit-button {
    width: 100%;
    padding: 1.6rem 2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
}

.submit-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.submit-button:hover::before {
    left: 100%;
}

.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.submit-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.submit-button i {
    font-size: 1.6rem;
}

/* ─── Flight Type Toggle ─────────────────────────────────── */
.flight-type-toggle {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50px;
    padding: 5px;
    margin-top: 1.2rem;
    gap: 4px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.toggle-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    color: black;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: nowrap;
    cursor: pointer;
}

.toggle-option i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.toggle-option:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
    text-decoration: none;
}

.toggle-option:hover i {
    transform: scale(1.15);
}

.toggle-option.active {
    background: #a8a8a8;
    color: #1a1a2e;
    font-weight: 700;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
    pointer-events: none;
}

.toggle-option.active i {
    color: #1a1a2e;
}

.hero-header {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Responsive */
@media (max-width: 480px) {
    .toggle-option {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .toggle-option span {
        display: none;
    }

    .toggle-option i {
        font-size: 1.1rem;
    }
}

/* Content Section - Modern */
.content {
    padding: 4rem 2rem;
}

.modern-heading {
    text-align: center;
    margin-bottom: 3rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.heading-word {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: fadeInUp 0.6s ease-out backwards;
}

.heading-word:nth-child(1) { animation-delay: 0.1s; }
.heading-word:nth-child(2) { animation-delay: 0.2s; }
.heading-word:nth-child(3) { animation-delay: 0.3s; }
.heading-word:nth-child(4) { animation-delay: 0.4s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.content-card {
    padding: 3rem;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.content-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* Date Picker Enhancement */
.jdp-day {
    font-size: 1.8rem;
    transition: all var(--transition-fast);
}

.jdp-day:hover {
    transform: scale(1.1);
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: var(--radius-sm);
    transition: background var(--transition-normal);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-hover);
}

/* Media Queries */
@media (max-width: 1200px) {
    html {
        font-size: 55%;
    }
}

@media (max-width: 1024px) {
    header {
        padding: 2rem;
    }

    section {
        padding: 2rem;
    }

    .modern-form {
        padding: 2rem;
    }

    .route-selector-wrapper {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .swap-button {
        margin: 0 auto;
        margin-bottom: 0;
    }
}

@media (max-width: 855px) {
    #responsive-image {
        display: none !important;
    }
}

@media (min-width: 768px) {
    .responsive-div {
        flex-direction: row !important;
    }

    .box {
        width: 33%;
    }

    .carousel-control-next,
    .carousel-control-prev {
        width: 6% !important;
    }
}

@media (max-width: 768px) {
    #menu-bar {
        display: initial;
    }

    header .navbar {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        background: #333;
        border-top: .1rem solid rgba(255, 255, 255, .2);
        padding: 1rem 2rem;
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    }

    header .navbar.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }

    header .navbar a {
        display: block;
        border-radius: .5rem;
        padding: 1.5rem;
        margin: 1.5rem 0;
        background: #222;
    }

    .content img {
        width: 100% !important;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .counter-modern {
        left: 0;
        right: 0;
        width: 100%;
    }

    .route-selector-wrapper {
        grid-template-columns: 1fr;
    }

    .swap-button {
        margin: 0 auto;
        order: 2;
    }

    .route-selector-wrapper .input-group-modern:first-child {
        order: 1;
    }

    .route-selector-wrapper .input-group-modern:last-child {
        order: 3;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 50%;
    }

    .heading-word {
        font-size: 2.5rem;
    }

    .responsive-div {
        flex-direction: column;
    }

    .modern-form {
        padding: 1.5rem;
    }

    .content-card {
        padding: 2rem;
    }

    .swap-button {
        width: 44px;
        height: 44px;
        min-width: 44px;
    }

    .swap-button i {
        font-size: 1.6rem;
    }
}

@media (max-width: 384px) {
    .counter-modern {
        width: 100%;
        left: 0;
        right: 0;
    }

    .modern-form {
        padding: 1.2rem;
    }
}

/* Focus Visible for Accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduce Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}