/* ===== WHITEOUT SURVIVAL TIPS - MODERN CSS STYLES ===== */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
}

/* ===== GLOBAL STYLES ===== */

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* ===== TYPOGRAPHY ===== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.display-4, .display-5 {
    font-weight: 700;
    letter-spacing: -0.025em;
}

.lead {
    font-size: 1.125rem;
    font-weight: 400;
}

/* ===== LAYOUT ===== */

.main-content {
    margin-top: 76px; /* Account for fixed navbar */
    min-height: calc(100vh - 76px);
}

.container {
    max-width: 1200px;
}

/* ===== NAVIGATION ===== */

.navbar {
    backdrop-filter: blur(10px);
    background-color: rgba(33, 37, 41, 0.95) !important;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color) !important;
    transform: translateY(-1px);
}

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

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

.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
    animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== HERO SECTION ===== */

.hero-section {
    background: var(--gradient-bg);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::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%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-icon {
    font-size: 8rem;
    opacity: 0.9;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ===== CARDS ===== */

.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
}

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

.card-header {
    border-bottom: none;
    font-weight: 600;
    padding: 1rem 1.25rem;
}

.guide-card {
    height: 100%;
    border: 2px solid transparent;
    transition: var(--transition);
}

.guide-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-6px);
}

/* ===== BUTTONS ===== */

.btn {
    font-weight: 500;
    border-radius: var(--border-radius);
    padding: 0.625rem 1.25rem;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #4dabf7);
}

.btn-success {
    background: linear-gradient(45deg, var(--success-color), #69db7c);
}

.btn-warning {
    background: linear-gradient(45deg, var(--warning-color), #ffd43b);
    color: var(--dark-color);
}

.btn-danger {
    background: linear-gradient(45deg, var(--danger-color), #ff6b6b);
}

.btn-info {
    background: linear-gradient(45deg, var(--info-color), #74c0fc);
    color: var(--dark-color);
}

/* ===== BACKGROUND UTILITIES ===== */

.bg-gradient {
    background: var(--gradient-bg);
}

.bg-light {
    background-color: #f8f9fc !important;
}

/* ===== BADGES ===== */

.badge {
    font-weight: 500;
    border-radius: 0.35rem;
    padding: 0.4em 0.65em;
}

/* ===== TABLES ===== */

.table {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead th {
    border-bottom: 2px solid var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

.table tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.1);
    transform: scale(1.01);
}

/* ===== ALERTS ===== */

.alert {
    border: none;
    border-radius: var(--border-radius);
    border-left: 4px solid;
    box-shadow: var(--shadow-sm);
}

.alert-info {
    border-left-color: var(--info-color);
    background-color: rgba(13, 202, 240, 0.1);
}

.alert-success {
    border-left-color: var(--success-color);
    background-color: rgba(25, 135, 84, 0.1);
}

.alert-warning {
    border-left-color: var(--warning-color);
    background-color: rgba(255, 193, 7, 0.1);
}

.alert-danger {
    border-left-color: var(--danger-color);
    background-color: rgba(220, 53, 69, 0.1);
}

/* ===== PROGRESS BARS ===== */

.progress {
    height: 0.75rem;
    border-radius: var(--border-radius);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    border-radius: var(--border-radius);
    transition: width 0.6s ease;
}

/* ===== FORMS ===== */

.form-control {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 0.625rem 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    transform: translateY(-1px);
}

/* ===== ACCORDION ===== */

.accordion-button {
    font-weight: 500;
    border-radius: var(--border-radius) !important;
    transition: var(--transition);
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.accordion-button:not(.collapsed) {
    background-color: var(--primary-color);
    color: white;
}

.accordion-item {
    border: none;
    margin-bottom: 0.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

/* ===== LIST GROUPS ===== */

.list-group-item {
    border: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.list-group-item:hover {
    background-color: rgba(13, 110, 253, 0.05);
    transform: translateX(4px);
}

.list-group-item:last-child {
    border-bottom: none;
}

/* ===== ICONS ===== */

.fa, .fas, .far, .fab {
    transition: var(--transition);
}

/* Icon hover effects for specific contexts */
.card:hover .fa,
.btn:hover .fa {
    transform: scale(1.1);
}

/* ===== ANIMATIONS ===== */

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

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

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

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

/* Apply animations on scroll */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== FOOTER ===== */

footer {
    background-color: var(--dark-color);
    color: #adb5bd;
}

footer a {
    color: #adb5bd;
    transition: var(--transition);
}

footer a:hover {
    color: white;
    text-decoration: none;
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .hero-icon {
        font-size: 4rem;
    }
    
    .display-4,
    .display-5 {
        font-size: 2rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .hero-section .container {
        text-align: center;
    }
    
    .card-body {
        padding: 1rem;
    }
}

/* ===== UTILITY CLASSES ===== */

.text-shadow {
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.hover-scale {
    transition: var(--transition);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(45deg, var(--primary-color), var(--info-color)) border-box;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ===== DARK MODE SUPPORT ===== */

@media (prefers-color-scheme: dark) {
    :root {
        --dark-color: #f8f9fa;
        --light-color: #212529;
    }
    
    body {
        background-color: #1a1a1a;
        color: var(--dark-color);
    }
    
    .card {
        background-color: #2d2d2d;
        color: var(--dark-color);
    }
    
    .table {
        background-color: #2d2d2d;
        color: var(--dark-color);
    }
    
    .table-striped tbody tr:nth-of-type(odd) {
        background-color: rgba(255, 255, 255, 0.05);
    }
}

/* ===== CUSTOM SCROLLBAR ===== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: var(--border-radius);
}

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

::-webkit-scrollbar-thumb:hover {
    background: #0b5ed7;
}

/* ===== PRINT STYLES ===== */

@media print {
    .navbar,
    footer,
    .btn,
    .alert {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ===== ACCESSIBILITY ===== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid;
    }
    
    .card {
        border: 1px solid;
    }
}

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