/* AeroBook Flight Booking System - Professional CSS */

/* Global Styles */
:root {
    /* Professional Color Palette */
    --primary-color: #1e3a8a;
    --secondary-color: #3730a3;
    --accent-color: #f59e0b;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --gray-color: #6b7280;
    --light-gray: #e5e7eb;
    --white: #ffffff;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'Playfair Display', Georgia, serif;
    
    /* Spacing & Sizing */
    --border-radius: 12px;
    --border-radius-sm: 6px;
    --border-radius-lg: 16px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --box-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.4s ease-in-out;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
    font-weight: 400;
    letter-spacing: -0.01em;
}

/* Professional Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.025em;
    color: var(--dark-color);
}

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 2rem; font-weight: 600; }
h3 { font-size: 1.5rem; font-weight: 600; }
h4 { font-size: 1.25rem; font-weight: 600; }
h5 { font-size: 1.125rem; font-weight: 600; }
h6 { font-size: 1rem; font-weight: 600; }

.display-4 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.025em;
}

.lead {
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--gray-color);
}

/* Professional Headings */
.heading-accent {
    font-family: var(--font-secondary);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hero Section - Professional Design */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" patternUnits="userSpaceOnUse" width="100" height="100"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.1;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to top, var(--light-color), transparent);
}

.min-vh-50 {
    min-height: 50vh;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.min-vh-50 {
    min-height: 50vh;
}

/* Search Form - Professional Design */
.search-form {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--box-shadow-xl);
    margin-top: -60px;
    position: relative;
    z-index: 10;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.search-form .form-control,
.search-form .form-select {
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius);
    padding: 14px 18px;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    background: var(--white);
}

.search-form .form-control:focus,
.search-form .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
    outline: none;
}

.search-form .form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 8px;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-form .btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: var(--border-radius);
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition-smooth);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--box-shadow);
}

.search-form .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.search-form .form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.search-form .form-check-label {
    font-weight: 500;
    color: var(--dark-color);
}

/* Flight Cards - Professional Design */
.flight-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    transition: var(--transition-smooth);
    margin-bottom: 24px;
    overflow: hidden;
    border: 1px solid var(--light-gray);
    position: relative;
}

.flight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
}

.flight-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-xl);
    border-color: var(--primary-color);
}

.flight-card:hover::before {
    opacity: 1;
}

.flight-card .card-body {
    padding: 32px;
}

.flight-price {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.flight-airline {
    font-weight: 600;
    color: var(--gray-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.flight-time {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 4px;
}

.flight-duration {
    color: var(--gray-color);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.flight-stops {
    background: linear-gradient(135deg, var(--light-color), var(--white));
    color: var(--gray-color);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid var(--light-gray);
}

.flight-route {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 20px 0;
    position: relative;
}

.flight-route::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 20%;
    right: 20%;
    height: 2px;
    background: var(--light-gray);
    z-index: 1;
}

.flight-route-dot {
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    position: relative;
    z-index: 2;
    border: 3px solid var(--white);
    box-shadow: var(--box-shadow);
}

/* Booking Form - Professional Design */
.booking-form {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--box-shadow-lg);
    border: 1px solid var(--light-gray);
}

.passenger-form {
    background: linear-gradient(135deg, var(--light-color), var(--white));
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--light-gray);
    position: relative;
    overflow: hidden;
}

.passenger-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

/* Buttons - Professional Design */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: var(--border-radius);
    padding: 14px 28px;
    font-weight: 600;
    transition: var(--transition-smooth);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.btn-primary:hover::before {
    left: 100%;
}

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

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--border-radius);
    padding: 14px 28px;
    font-weight: 600;
    transition: var(--transition-smooth);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    background: transparent;
    position: relative;
    overflow: hidden;
}

.btn-outline-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--primary-color);
    transition: var(--transition);
    z-index: -1;
}

.btn-outline-primary:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-outline-primary:hover::before {
    width: 100%;
}

.btn-lg {
    padding: 18px 36px;
    font-size: 1rem;
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.75rem;
}

/* Navigation - Professional Design */
.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    box-shadow: var(--box-shadow-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--white) !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand i {
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--white), rgba(255, 255, 255, 0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav .nav-link {
    font-weight: 500;
    margin: 0 8px;
    transition: var(--transition-smooth);
    color: rgba(255, 255, 255, 0.9) !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    position: relative;
    padding: 0.5rem 1rem !important;
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover {
    color: var(--white) !important;
}

.navbar-nav .nav-link:hover::before {
    width: 80%;
}

.navbar-nav .nav-link.active {
    color: var(--white) !important;
}

.navbar-nav .nav-link.active::before {
    width: 80%;
}

.navbar-toggler {
    border: none;
    padding: 0.25rem 0.5rem;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.dropdown-menu {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-xl);
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--white);
    border: 1px solid var(--light-gray);
}

.dropdown-item {
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    margin: 0.25rem 0;
    font-weight: 500;
    color: var(--dark-color);
    transition: var(--transition);
}

.dropdown-item:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    transform: translateX(4px);
}

.dropdown-divider {
    margin: 0.5rem 0;
    border-color: var(--light-gray);
}

/* Dashboard - Professional Design */
.dashboard-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    box-shadow: var(--box-shadow);
    margin-bottom: 24px;
    transition: var(--transition-smooth);
    border: 1px solid var(--light-gray);
    position: relative;
    overflow: hidden;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-xl);
    border-color: var(--primary-color);
}

.dashboard-card:hover::before {
    opacity: 1;
}

.dashboard-card h5 {
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.booking-status {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-block;
}

.status-confirmed {
    background: linear-gradient(135deg, var(--success-color), #10b981);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
}

.status-pending {
    background: linear-gradient(135deg, var(--warning-color), #f59e0b);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(217, 119, 6, 0.2);
}

.status-cancelled {
    background: linear-gradient(135deg, var(--danger-color), #ef4444);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(220, 38, 38, 0.2);
}

.stats-card {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--white), var(--light-color));
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    border: 1px solid var(--light-gray);
    transition: var(--transition-smooth);
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stats-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Admin Panel - Professional Design */
.admin-sidebar {
    background: linear-gradient(180deg, var(--dark-color), #111827);
    min-height: 100vh;
    padding: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--box-shadow-lg);
}

.admin-sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 16px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-smooth);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    font-weight: 500;
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-sidebar .nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    transform: scaleY(0);
    transition: var(--transition);
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--white);
}

.admin-sidebar .nav-link.active::before {
    transform: scaleY(1);
}

.admin-content {
    background: var(--light-color);
    min-height: 100vh;
    padding: 40px;
}

.admin-header {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
    border: 1px solid var(--light-gray);
}

.admin-section {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
    border: 1px solid var(--light-gray);
}

/* Forms - Professional Design */
.form-control,
.form-select {
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius);
    padding: 12px 16px;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    background: var(--white);
    color: var(--dark-color);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
    outline: none;
    background: var(--white);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 8px;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(30, 58, 138, 0.2);
}

.form-check-label {
    font-weight: 500;
    color: var(--dark-color);
    margin-left: 0.5rem;
}

.input-group {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.input-group-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
}

/* Utility Classes */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background: var(--primary-color) !important;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 50px 0;
    }
    
    .search-form {
        margin-top: -30px;
        padding: 20px;
    }
    
    .flight-card .card-body {
        padding: 15px;
    }
    
    .flight-price {
        font-size: 1.5rem;
    }
    
    .admin-sidebar {
        min-height: auto;
    }
    
    .admin-content {
        padding: 20px;
    }
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Autocomplete */
.autocomplete-container {
    position: relative;
}

.autocomplete-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid #ddd;
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

.autocomplete-suggestion {
    padding: 10px 15px;
    cursor: pointer;
    transition: var(--transition);
}

.autocomplete-suggestion:hover,
.autocomplete-suggestion.active {
    background: var(--primary-color);
    color: white;
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-in {
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .btn,
    .no-print {
        display: none !important;
    }
    
    .flight-card,
    .booking-form {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}