/**
 * Yatra Common Styles
 * Base styles and wrapper system for all Yatra pages
 * 
 * Design System:
 * - Max content width: 1200px
 * - Side padding: 20px (mobile) / 24px (tablet) / 32px (desktop)
 * - Page background: #f9fafb
 * 
 * @package Yatra
 */

/* ============================================
   CSS VARIABLES (Design Tokens)
   ============================================ */
:root {
    /* Layout */
    --yatra-container-max-width: 1300px;
    --yatra-container-padding: 20px;
    --yatra-container-padding-md: 24px;
    --yatra-container-padding-lg: 32px;
    
    /* Colors */
    --yatra-bg-page: #f9fafb;
    --yatra-bg-white: #ffffff;
    --yatra-bg-gray-50: #f9fafb;
    --yatra-bg-gray-100: #f3f4f6;
    
    --yatra-text-primary: #1f2937;
    --yatra-text-secondary: #4b5563;
    --yatra-text-muted: #6b7280;
    --yatra-text-light: #9ca3af;
    
    --yatra-border-color: #e5e7eb;
    --yatra-border-light: #f3f4f6;
    
    --yatra-primary: #3b82f6;
    --yatra-primary-dark: #2563eb;
    --yatra-primary-light: #60a5fa;
    
    --yatra-success: #10b981;
    --yatra-warning: #f59e0b;
    --yatra-error: #ef4444;
    --yatra-star: #fbbf24;
    
    /* Shadows */
    --yatra-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --yatra-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --yatra-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --yatra-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --yatra-radius-sm: 6px;
    --yatra-radius: 8px;
    --yatra-radius-md: 12px;
    --yatra-radius-lg: 16px;
    --yatra-radius-xl: 24px;
    
    /* Spacing */
    --yatra-space-xs: 4px;
    --yatra-space-sm: 8px;
    --yatra-space-md: 16px;
    --yatra-space-lg: 24px;
    --yatra-space-xl: 32px;
    --yatra-space-2xl: 48px;
    
    /* Typography */
    --yatra-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --yatra-font-size-xs: 12px;
    --yatra-font-size-sm: 13px;
    --yatra-font-size-base: 15px;
    --yatra-font-size-md: 16px;
    --yatra-font-size-lg: 18px;
    --yatra-font-size-xl: 20px;
    --yatra-font-size-2xl: 24px;
    --yatra-font-size-3xl: 30px;
    --yatra-font-size-4xl: 36px;
}

/* ============================================
   BASE PAGE WRAPPER
   ============================================ */
.yatra-page {
    width: 100%;
    min-height: 100vh;
    background: var(--yatra-bg-page);
    font-family: var(--yatra-font-family);
    color: var(--yatra-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   CONTAINER SYSTEM
   ============================================ */
.yatra-container {
    width: 100%;
    max-width: var(--yatra-container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--yatra-container-padding);
    padding-right: var(--yatra-container-padding);
}

/* Full-width container with max-width inner content */
.yatra-container-fluid {
    width: 100%;
    padding-left: var(--yatra-container-padding);
    padding-right: var(--yatra-container-padding);
}

.yatra-container-fluid > .yatra-container-inner {
    max-width: var(--yatra-container-max-width);
    margin-left: auto;
    margin-right: auto;
}

/* Narrow container for content-focused pages */
.yatra-container-narrow {
    max-width: 900px;
}

/* Wide container for dashboard/admin pages */
.yatra-container-wide {
    max-width: 1400px;
}

/* ============================================
   SECTION SYSTEM
   ============================================ */
.yatra-section {
    padding-top: var(--yatra-space-xl);
    padding-bottom: var(--yatra-space-xl);
}

.yatra-section-sm {
    padding-top: var(--yatra-space-lg);
    padding-bottom: var(--yatra-space-lg);
}

.yatra-section-lg {
    padding-top: var(--yatra-space-2xl);
    padding-bottom: var(--yatra-space-2xl);
}

/* ============================================
   PAGE HEADER
   ============================================ */
.yatra-page-header {
    background: var(--yatra-bg-white);
    border-bottom: 1px solid var(--yatra-border-color);
    padding: var(--yatra-space-lg) 0;
}

.yatra-page-title {
    font-size: var(--yatra-font-size-3xl);
    font-weight: 700;
    color: var(--yatra-text-primary);
    margin: 0 0 var(--yatra-space-sm) 0;
}

.yatra-page-subtitle {
    font-size: var(--yatra-font-size-base);
    color: var(--yatra-text-muted);
    margin: 0;
}

/* ============================================
   CONTENT AREA
   ============================================ */
.yatra-content {
    padding: var(--yatra-space-lg) 0;
}

/* Two-column layout with sidebar */
.yatra-content-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--yatra-space-xl);
}

.yatra-content-main {
    min-width: 0;
}

.yatra-content-sidebar {
    position: relative;
}

.yatra-sidebar-sticky {
    position: sticky;
    top: 100px;
}

/* Reversed layout (sidebar on left) */
.yatra-content-with-sidebar.yatra-sidebar-left {
    grid-template-columns: 280px 1fr;
}

/* ============================================
   CARD SYSTEM
   ============================================ */
.yatra-card {
    background: var(--yatra-bg-white);
    border-radius: var(--yatra-radius-md);
    box-shadow: var(--yatra-shadow);
    overflow: hidden;
}

.yatra-card-bordered {
    box-shadow: none;
    border: 1px solid var(--yatra-border-color);
}

.yatra-card-header {
    padding: var(--yatra-space-lg);
    border-bottom: 1px solid var(--yatra-border-color);
}

.yatra-card-body {
    padding: var(--yatra-space-lg);
}

.yatra-card-footer {
    padding: var(--yatra-space-lg);
    border-top: 1px solid var(--yatra-border-color);
    background: var(--yatra-bg-gray-50);
}

/* ============================================
   GRID SYSTEM
   ============================================ */
.yatra-grid {
    display: grid;
    gap: var(--yatra-space-lg);
}

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

.yatra-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.yatra-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.yatra-grid-auto {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */
@media (min-width: 640px) {
    :root {
        --yatra-container-padding: var(--yatra-container-padding-md);
    }
}

@media (min-width: 1024px) {
    :root {
        --yatra-container-padding: var(--yatra-container-padding-lg);
    }
}

@media (max-width: 1024px) {
    .yatra-content-with-sidebar {
        grid-template-columns: 1fr;
    }

    .yatra-content-with-sidebar.yatra-sidebar-left {
        grid-template-columns: 1fr;
    }

    .yatra-content-sidebar {
        order: -1;
    }

    .yatra-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .yatra-grid-3,
    .yatra-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .yatra-page-title {
        font-size: var(--yatra-font-size-2xl);
    }
}

@media (max-width: 480px) {
    .yatra-grid-2,
    .yatra-grid-3,
    .yatra-grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.yatra-text-center { text-align: center; }
.yatra-text-left { text-align: left; }
.yatra-text-right { text-align: right; }

.yatra-mb-0 { margin-bottom: 0; }
.yatra-mb-sm { margin-bottom: var(--yatra-space-sm); }
.yatra-mb-md { margin-bottom: var(--yatra-space-md); }
.yatra-mb-lg { margin-bottom: var(--yatra-space-lg); }
.yatra-mb-xl { margin-bottom: var(--yatra-space-xl); }

.yatra-mt-0 { margin-top: 0; }
.yatra-mt-sm { margin-top: var(--yatra-space-sm); }
.yatra-mt-md { margin-top: var(--yatra-space-md); }
.yatra-mt-lg { margin-top: var(--yatra-space-lg); }
.yatra-mt-xl { margin-top: var(--yatra-space-xl); }

.yatra-hidden { display: none !important; }
.yatra-visible { display: block !important; }

/* ============================================
   LOADING STATES
   ============================================ */
.yatra-loading {
    position: relative;
    pointer-events: none;
}

.yatra-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 2px solid var(--yatra-border-color);
    border-top-color: var(--yatra-primary);
    border-radius: 50%;
    animation: yatra-spinner 0.8s linear infinite;
}

@keyframes yatra-spinner {
    to { transform: rotate(360deg); }
}

/* ============================================
   LEGACY COMPATIBILITY
   Keep old class names working while transitioning
   ============================================ */
.yatra-booking-page {
    width: 100%;
    min-height: 100vh;
}

.yatra-single-trip {
    width: 100%;
    min-height: 100vh;
}

.yatra-listing-container,
.yatra-booking-container,
.yatra-trip-container,
.yatra-horizontal-search-container,
.yatra-similar-section-container {
    width: 100%;
    max-width: var(--yatra-container-max-width, 1300px);
    margin-left: auto;
    margin-right: auto;
}

.yatra-traveler-selector .yatra-quantity-controls {
    gap: 6px;
}

.yatra-traveler-selector .yatra-quantity-btn,
.yatra-traveler-selector .yatra-qty-btn {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 10px;
    border: 1px solid #e5e7eb;
    background: #ffffff;
    color: #0f172a;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.yatra-traveler-selector .yatra-quantity-btn:hover:not(:disabled),
.yatra-traveler-selector .yatra-qty-btn:hover:not(:disabled) {
    background: #f8fafc;
    border-color: #cbd5e1;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.08);
}

.yatra-traveler-selector .yatra-quantity-btn:active:not(:disabled),
.yatra-traveler-selector .yatra-qty-btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.10);
}

.yatra-traveler-selector .yatra-quantity-btn:disabled,
.yatra-traveler-selector .yatra-qty-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.yatra-traveler-selector .yatra-quantity-btn svg,
.yatra-traveler-selector .yatra-qty-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2.25;
}

/* Quick facts: single-trip layout lives in trip.css (hairline grid, neutral icons). */

/* ============================================
   STICKY NAVIGATION - Single Trip Page
   ============================================ */
.yatra-sticky-nav-price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    padding: 8px 16px;
    margin-left: auto;
    min-width: 140px;
    text-align: right;
}

.yatra-sticky-nav-price-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--yatra-text-muted);
    line-height: 1.2;
}

.yatra-sticky-nav-price-amount {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 18px;
    font-weight: 700;
    color: var(--yatra-primary);
    line-height: 1.2;
}

.yatra-sticky-nav-price-amount svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.yatra-sticky-nav-price-note {
    font-size: 10px;
    font-weight: 400;
    color: var(--yatra-text-muted);
    line-height: 1.2;
}

@media (max-width: 768px) {
    .yatra-sticky-nav-price {
        min-width: 120px;
        padding: 6px 12px;
    }
    
    .yatra-sticky-nav-price-amount {
        font-size: 16px;
    }
}