/* ============================================
   Flight Price Tracker - Modern Design System
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Clean, modern palette */
    --color-primary: #0066FF;
    --color-primary-hover: #0052CC;
    --color-primary-light: #E6F0FF;
    --color-primary-subtle: #F0F7FF;

    --color-success: #00875A;
    --color-success-light: #E3FCEF;

    --color-text: #1A1A1A;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;

    --color-bg: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-focus: 0 0 0 3px rgba(0, 102, 255, 0.15);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Selection */
::selection {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    background: linear-gradient(135deg, #0066FF 0%, #0047B3 100%);
    padding: var(--space-2xl) var(--space-md);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 480px;
    margin: 0 auto;
}

.hero-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-md);
    color: white;
    backdrop-filter: blur(8px);
}

.hero h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.85);
    max-width: 360px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ============================================
   Form Container
   ============================================ */
.form-container {
    flex: 1;
    padding: var(--space-lg) var(--space-md);
    display: flex;
    justify-content: center;
}

form {
    width: 100%;
    max-width: 420px;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-lg);
    position: relative;
}

/* Form Sections */
.form-section {
    margin-bottom: var(--space-md);
    position: relative;
}

.form-section:last-child {
    margin-bottom: 0;
}

.advanced-section {
    margin-top: calc(-1 * var(--space-md) + var(--space-sm));
}

/* ============================================
   Route Inputs
   ============================================ */
.route-section {
    background: var(--color-bg);
    margin: calc(var(--space-lg) * -1);
    margin-bottom: var(--space-sm);
    padding: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.route-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    position: relative;
}

.form-group.iata-field {
    position: relative;
}

.form-group.iata-field input {
    width: 100%;
    padding: var(--space-md) var(--space-md) var(--space-md) 48px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--color-surface);
    transition: var(--transition-fast);
    color: var(--color-text);
}

.form-group.iata-field input:hover {
    border-color: var(--color-text-muted);
}

.form-group.iata-field input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.form-group.iata-field input::placeholder {
    color: var(--color-text-muted);
}

.form-group.iata-field .input-icon {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-group.iata-field .input-label {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Swap Button */
.swap-btn {
    position: absolute;
    right: calc(var(--space-md) + 40px);
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    z-index: 5;
    pointer-events: auto;
}

.swap-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-subtle);
}

.swap-btn:active {
    transform: translateY(-50%) scale(0.95);
}

/* ============================================
   Option Chips
   ============================================ */
.options-section {
    margin-top: calc(-1 * var(--space-sm));
    margin-bottom: var(--space-sm);
}

.option-chips {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.chip {
    cursor: pointer;
}

.chip input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.chip-content {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    gap: 6px;
    padding: var(--space-sm) var(--space-md);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    transition: var(--transition-fast);
}

.chip-content svg {
    opacity: 0.7;
}

.chip:hover .chip-content {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.chip input:checked + .chip-content {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.chip input:checked + .chip-content svg {
    opacity: 1;
}

.chip input:focus + .chip-content {
    box-shadow: var(--shadow-focus);
}

/* Travelers Counter Control */
.travelers-control {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    gap: 2px;
    padding: 2px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-surface);
}

.travelers-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.travelers-btn:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.travelers-btn:active {
    background: var(--color-border-light);
}

.travelers-display {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0 var(--space-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.travelers-display svg {
    opacity: 0.7;
}

/* Hidden switches for backward compatibility */
.form-group.switches {
    display: none;
}

/* ============================================
   Date Field
   ============================================ */
.date-field {
    position: relative;
}

.date-field .input-icon {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
    z-index: 1;
}

.date-field input {
    width: 100%;
    padding: var(--space-md) var(--space-md) var(--space-md) 48px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--color-surface);
    transition: var(--transition-fast);
    color: var(--color-text);
    cursor: pointer;
}

.date-field input:hover {
    border-color: var(--color-text-muted);
}

.date-field input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

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

/* ============================================
   Filters Grid
   ============================================ */
.filters-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.filter-item label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    padding-left: 2px;
}

.filter-item select {
    width: 100%;
    padding: var(--space-sm) var(--space-sm);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 24 24' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 9l6 6 6-6' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 28px;
}

.filter-item input#currency {
    width: 100%;
    padding: var(--space-sm) var(--space-sm);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    transition: var(--transition-fast);
}

.filter-item input#currency:hover {
    border-color: var(--color-text-muted);
}

.filter-item input#currency:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.filter-item select:hover {
    border-color: var(--color-text-muted);
}

.filter-item select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

/* Disabled state for filter items */
.filter-item select:disabled,
.filter-item select.disabled-input {
    background-color: var(--color-border-light);
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

/* ============================================
   Time Sliders
   ============================================ */
.time-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.time-slider-group {
    padding: 0 var(--space-xs);
}

.time-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.time-label-text {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.time-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    font-variant-numeric: tabular-nums;
}

.time-slider {
    height: 6px;
}

/* noUiSlider Overrides */
.noUi-target {
    background: var(--color-border) !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: var(--radius-full) !important;
    height: 6px !important;
}

.noUi-connect {
    background: var(--color-primary) !important;
    border-radius: var(--radius-full) !important;
}

.noUi-handle {
    width: 20px !important;
    height: 20px !important;
    border-radius: var(--radius-full) !important;
    background: var(--color-surface) !important;
    border: 2px solid var(--color-primary) !important;
    box-shadow: var(--shadow-sm) !important;
    cursor: grab !important;
    top: -8px !important;
    right: -10px !important;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast) !important;
}

.noUi-handle:hover {
    transform: scale(1.1);
}

.noUi-handle:active {
    cursor: grabbing !important;
}

.noUi-handle:focus {
    outline: none;
    box-shadow: var(--shadow-focus) !important;
}

.noUi-handle::before,
.noUi-handle::after {
    display: none !important;
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:focus {
    outline: none;
    box-shadow: var(--shadow-focus);
}

.check-availability-section {
    margin-bottom: var(--space-sm);
}

/* Price field highlight after availability check */
.floating-label.price-highlight input {
    border-color: var(--color-success);
    box-shadow: 0 0 0 3px rgba(0, 135, 90, 0.15);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Help Button */
.help-btn {
    position: absolute;
    right: 0;
    top: 0;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.help-btn:hover {
    background: var(--color-border-light);
    color: var(--color-text-secondary);
}

/* Tooltip */
#tooltip {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-text);
    color: white;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    width: 240px;
    z-index: 100;
    box-shadow: var(--shadow-lg);
    line-height: 1.5;
}

#tooltip::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 12px;
    width: 12px;
    height: 12px;
    background: var(--color-text);
    transform: rotate(45deg);
}

/* ============================================
   Advanced Settings
   ============================================ */
.advanced-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-md);
    background: var(--color-bg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    font-family: inherit;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.advanced-toggle:hover {
    background: var(--color-border-light);
    color: var(--color-text);
}

.toggle-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal);
}

.advanced-toggle.expanded .toggle-icon {
    transform: rotate(180deg);
}

#advancedSettings {
    display: none;
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
}

.airline-selection-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mode-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
    margin: 0;
}

/* Segmented Control */
.segmented-control {
    position: relative;
}

.segmented-checkbox {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.segmented-label {
    display: flex;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 4px;
    cursor: pointer;
    border: 1.5px solid var(--color-border);
}

.segment {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    color: var(--color-text-secondary);
}

.segmented-checkbox:not(:checked) ~ .segmented-label .segment-exclude {
    background: var(--color-primary);
    color: white;
}

.segmented-checkbox:checked ~ .segmented-label .segment-include {
    background: var(--color-primary);
    color: white;
}

/* Airline Select */
.airline-select {
    margin-bottom: 0;
}

/* Choices.js Overrides */
.choices {
    margin-bottom: 0;
    font-family: inherit;
}

.choices__inner {
    background-color: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    min-height: 44px;
    padding: 4px 8px;
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.choices__inner:hover {
    border-color: var(--color-text-muted);
}

.is-focused .choices__inner,
.is-open .choices__inner {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.choices__list--multiple .choices__item {
    background: var(--color-primary-light);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    font-size: var(--font-size-xs);
    font-weight: 500;
    padding: 4px 8px;
    margin: 2px;
}

.choices__list--multiple .choices__item.is-highlighted {
    background: var(--color-primary);
    color: white;
}

.choices__button {
    border-left: 1px solid rgba(0, 102, 255, 0.2);
    opacity: 0.7;
}

.choices__button:hover {
    opacity: 1;
}

.choices__list--dropdown,
.choices__list[aria-expanded] {
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: 4px;
    z-index: 100;
}

.choices__list--dropdown .choices__item,
.choices__list[aria-expanded] .choices__item {
    padding: 10px 12px;
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.choices__list--dropdown .choices__item--selectable.is-highlighted,
.choices__list[aria-expanded] .choices__item--selectable.is-highlighted {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.choices__list--dropdown .choices__item--selectable.is-selected {
    opacity: 0.5;
}

.choices__input {
    background: transparent;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    margin-bottom: 0;
    padding: 2px 0;
}

.choices__input::placeholder {
    color: var(--color-text-muted);
}

.choices__placeholder {
    color: var(--color-text-muted);
    opacity: 1;
}

.choices[data-type*=select-multiple] .choices__input {
    min-width: 100px;
}

/* ============================================
   Submit Section
   ============================================ */
.submit-section {
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
}

.input-group-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: 0;
}

/* Reserve space so sticky bar doesn't cover the price input */
body.sticky-bar-open {
    padding-bottom: 120px;
}

/* Floating Label */
.floating-label {
    position: relative;
}

.floating-label input {
    width: 100%;
    height: 56px;
    padding: 0 var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--color-surface);
    transition: var(--transition-fast);
    color: var(--color-text);
    text-align: right;
    line-height: 56px;
}

/* Price input with currency suffix */
.floating-label input#maxPricePerPerson {
    padding-right: 52px;
    font-variant-numeric: tabular-nums;
}

.floating-label input:hover {
    border-color: var(--color-text-muted);
}

.floating-label input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.floating-label label {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    pointer-events: none;
    transition: var(--transition-fast);
    background: var(--color-surface);
    padding: 0 4px;
    line-height: 1;
}

.floating-label input:focus ~ label,
.floating-label input:not(:placeholder-shown) ~ label {
    top: 0;
    transform: translateY(-50%);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-primary);
}

.input-suffix {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    pointer-events: none;
    user-select: none;
}

/* Sticky Bottom Bar */
.sticky-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    padding: var(--space-md) var(--space-lg);
    padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom, 0px));
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.sticky-bar.visible {
    transform: translateY(0);
}

.sticky-bar-status {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    text-align: center;
}

.sticky-bar-row {
    display: flex;
    gap: var(--space-sm);
    max-width: 560px;
    margin: 0 auto;
}

.sticky-bar-row input[type="email"] {
    flex: 1;
    padding: var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-surface);
    transition: var(--transition-fast);
    min-width: 0;
    -webkit-appearance: none;
    appearance: none;
}

.sticky-bar-row input[type="email"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.sticky-bar-row .btn-submit {
    margin-top: 0;
    width: auto;
    padding: var(--space-md) var(--space-lg);
    white-space: nowrap;
    flex-shrink: 0;
}

.sticky-bar-hint {
    font-size: var(--font-size-xs);
    color: var(--color-success);
    text-align: center;
    margin-top: var(--space-sm);
}

@media (max-width: 480px) {
    .sticky-bar-row {
        flex-direction: column;
    }

    .sticky-bar-row .btn-submit {
        width: 100%;
    }
}

/* Submit Button */
.btn-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, #00875A 0%, #006644 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-submit:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 135, 90, 0.3);
}

.btn-submit:active:not(:disabled) {
    transform: translateY(0);
}

.btn-submit:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 135, 90, 0.2);
}

.btn-submit:disabled {
    background: var(--color-border);
    color: var(--color-text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ============================================
   Loader
   ============================================ */
.loader {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    z-index: 1000;
    border-radius: var(--radius-xl);
}

.loader::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-lg) var(--space-md);
    text-align: center;
}

.footer p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin: 0;
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.footer a:hover {
    text-decoration: underline;
}

/* ============================================
   Modals
   ============================================ */
.modal-backdrop {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-dialog {
    max-width: 400px;
    margin: var(--space-lg) auto;
    padding: var(--space-md);
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    border: none;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-xl) var(--space-lg) var(--space-md);
    border: none;
    position: relative;
}

.modal-header .btn-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    opacity: 0.5;
}

.modal-header .btn-close:hover {
    opacity: 1;
}

.modal-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
}

.modal-icon.success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.modal-body {
    padding: var(--space-md) var(--space-lg);
    text-align: center;
}

.modal-body p {
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.6;
}

.modal-footer {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg) var(--space-lg);
    border: none;
    justify-content: center;
}

.modal-footer .btn {
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    font-family: inherit;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.modal-footer .btn-primary {
    background: var(--color-primary);
    border: none;
    color: white;
}

.modal-footer .btn-primary:hover {
    background: var(--color-primary-hover);
}

.modal-footer .btn-secondary {
    background: transparent;
    border: 1.5px solid var(--color-border);
    color: var(--color-text-secondary);
}

.modal-footer .btn-secondary:hover {
    background: var(--color-bg);
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

/* ============================================
   Flatpickr Overrides
   ============================================ */
.flatpickr-calendar {
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-lg) !important;
    border: 1px solid var(--color-border) !important;
    font-family: inherit !important;
}

.flatpickr-day.selected,
.flatpickr-day.startRange,
.flatpickr-day.endRange {
    background: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
}

.flatpickr-day.inRange {
    background: var(--color-primary-light) !important;
    border-color: var(--color-primary-light) !important;
    box-shadow: none !important;
}

.flatpickr-day:hover {
    background: var(--color-primary-light) !important;
    border-color: var(--color-primary-light) !important;
}

/* ============================================
   jQuery UI Autocomplete Overrides
   ============================================ */
.ui-autocomplete {
    background-color: var(--color-surface) !important;
    border: 1px solid var(--color-border) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-lg) !important;
    max-height: 240px !important;
    overflow-y: auto !important;
    font-family: inherit !important;
    z-index: 99999 !important;
    padding: var(--space-xs) !important;
    position: absolute !important;
}

/* Ensure autocomplete can overflow from containers */
.route-section,
.route-inputs,
.form-group.iata-field {
    overflow: visible !important;
}

.ui-autocomplete .ui-menu-item {
    padding: 0 !important;
    margin: 0 !important;
}

.ui-autocomplete .ui-menu-item-wrapper {
    padding: var(--space-sm) var(--space-md) !important;
    font-size: var(--font-size-sm) !important;
    color: var(--color-text) !important;
    border-radius: var(--radius-sm) !important;
    transition: var(--transition-fast) !important;
}

.ui-autocomplete .ui-menu-item-wrapper:hover,
.ui-autocomplete .ui-state-active,
.ui-autocomplete .ui-state-focus {
    background-color: var(--color-primary-light) !important;
    color: var(--color-primary) !important;
    border: none !important;
    margin: 0 !important;
}

.ui-autocomplete::-webkit-scrollbar {
    width: 6px;
}

.ui-autocomplete::-webkit-scrollbar-track {
    background: transparent;
}

.ui-autocomplete::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

/* ============================================
   Explore Top Destinations
   ============================================ */
.explore-section {
    padding: var(--space-lg) var(--space-md) 0;
    max-width: 720px;
    margin: 0 auto;
}

.explore-container {
    width: 100%;
}

.explore-heading {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    text-align: center;
}

.explore-scroll {
    display: flex;
    gap: var(--space-md);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: var(--space-md);
    -webkit-overflow-scrolling: touch;
}

.explore-scroll::-webkit-scrollbar {
    height: 4px;
}

.explore-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.explore-scroll::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

.explore-card {
    flex: 0 0 140px;
    scroll-snap-align: start;
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
}

.explore-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.explore-card-city {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.explore-card-country {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.explore-card-dates {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.explore-card-price {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-radius: var(--radius-full);
    padding: 2px var(--space-sm);
    display: inline-block;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 480px) {
    .explore-section {
        padding: var(--space-md) var(--space-md) 0;
        max-width: 100%;
        overflow: hidden;
    }

    .explore-heading {
        text-align: center;
    }

    .explore-scroll {
        margin: 0 calc(-1 * var(--space-md));
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .explore-card {
        flex: 0 0 120px;
    }

    .hero {
        padding: var(--space-xl) var(--space-md);
    }

    .hero h1 {
        font-size: var(--font-size-xl);
    }

    .hero-icon {
        width: 56px;
        height: 56px;
    }

    .hero-icon svg {
        width: 32px;
        height: 32px;
    }

    .form-container {
        padding: var(--space-md) var(--space-sm);
    }

    form {
        padding: var(--space-md);
        border-radius: var(--radius-lg);
    }

    .route-section {
        margin: calc(var(--space-md) * -1);
        margin-bottom: var(--space-md);
        padding: var(--space-md);
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .filters-grid {
        gap: 6px;
    }

    .filter-item label {
        font-size: 0.7rem;
    }

    .filter-item select {
        font-size: var(--font-size-xs);
        padding: var(--space-sm) var(--space-xs);
        padding-right: 24px;
    }

    .filter-item input#currency {
        font-size: var(--font-size-xs);
        padding: var(--space-sm) var(--space-xs);
    }

    .option-chips {
        gap: 6px;
    }

    .chip-content {
        padding: 6px 10px;
        font-size: var(--font-size-xs);
    }

    .chip-content svg {
        width: 14px;
        height: 14px;
    }

    .btn-primary,
    .btn-submit {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
    }

    .modal-dialog {
        padding: var(--space-sm);
        margin: var(--space-sm);
    }

    .modal-header {
        padding: var(--space-lg) var(--space-md) var(--space-sm);
    }

    .modal-body {
        padding: var(--space-sm) var(--space-md);
    }

    .modal-footer {
        padding: var(--space-sm) var(--space-md) var(--space-md);
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Autofill Override */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 30px var(--color-surface) inset !important;
    -webkit-text-fill-color: var(--color-text) !important;
}

/* Disable native datalist arrow */
input[list]::-webkit-calendar-picker-indicator {
    display: none !important;
}

/* Price limit label styling for old reference */
.price-limit-label {
    display: none;
}

/* Input group compatibility */
.input-group .form-group.small-input-row {
    display: none;
}