/* Modern CSS for SAS Portfolio Website with Bootstrap 5.3+ - SPU Impact Showcase Style */

/* CSS Custom Properties */
:root {
    /* Sol Plaatje University Brand Colors */
    --spu-maroon: #8B1538;
    --spu-maroon-dark: #6B0F2A;
    --spu-gold: #D4AF37;
    --spu-gold-light: #F4E4A6;
    --spu-grey: #6C757D;
    --spu-light-grey: #F8F9FA;
    --spu-dark-grey: #343A40;
    
    /* Modern Dark Theme Color Palette */
    --primary: #8B1538;
    --primary-dark: #6B0F2A;
    --secondary: #D4AF37;
    --accent: #FF6B6B;
    --success: #28a745;
    --warning: #D4AF37;
    --info: #8B1538;
    --light: #F8F9FA;
    --dark: #1a1a2e;
    --dark-blue: #16213e;
    --dark-navy: #0f3460;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --section-padding: 5rem 0;
    --container-max-width: 1200px;
    
    /* Shadows */
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --shadow-xl: 0 2rem 4rem rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(139, 21, 56, 0.3);
    
    /* Border Radius */
    --border-radius-sm: 0.375rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--dark);
    background-color: #ffffff;
    overflow-x: hidden;
}

/* SPU Impact Showcase Style Enhancements */
.navbar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.navbar-nav .nav-link.active {
    background: linear-gradient(135deg, #8B1538 0%, #D4AF37 100%);
    color: white !important;
}

/* Hero Section Enhancements */
.hero-section {
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(212, 175, 55, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 21, 56, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    z-index: 1;
}

/* Text Gradient Effect */
.text-gradient {
    background: linear-gradient(135deg, #D4AF37 0%, #FFD700 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Card Enhancements */
.card {
    transition: all var(--transition-base);
    border: none;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

/* Icon Wrapper Enhancements */
.icon-wrapper {
    transition: all var(--transition-base);
    position: relative;
}

.icon-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: inherit;
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.card:hover .icon-wrapper {
    transform: scale(1.1) rotate(5deg);
}

.card:hover .icon-wrapper::before {
    opacity: 0.2;
}

/* Badge Enhancements */
.badge {
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* Button Enhancements */
.btn {
    font-weight: 600;
    letter-spacing: 0.5px;
    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: left var(--transition-slow);
}

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

/* Section Backgrounds */
.bg-light {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
}

/* Metric Cards */
.metric-card {
    transition: all var(--transition-base);
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(139, 21, 56, 0.05) 0%, rgba(212, 175, 55, 0.05) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

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

/* Animation Enhancements */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.floating {
    animation: float 6s ease-in-out infinite;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary) 100%);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--dark);
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.1;
}

.lead {
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 1.6;
}

/* Custom Button Styles */
.btn {
    font-family: var(--font-heading);
    font-weight: 500;
    border-radius: var(--border-radius-lg);
    padding: 0.75rem 1.5rem;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    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: left var(--transition-slow);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-color: var(--primary);
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
    background: transparent;
}

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

.btn-outline-light {
    color: white;
    border-color: rgba(255, 255, 255, 0.5);
    background: transparent;
}

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

/* Navigation Styles */
.navbar {
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-lg);
    padding: 0.5rem 0;
    margin-top: 0.5rem;
}

.dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: all var(--transition-base);
    font-weight: 500;
}

.dropdown-item:hover {
    background: var(--light);
    color: var(--primary);
    transform: translateX(5px);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    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" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    z-index: 1;
}

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

.hero-card {
    transition: all var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-card:hover {
    transform: translateY(-10px) rotate(0deg) !important;
    box-shadow: var(--shadow-xl);
}

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

/* Card Styles */
.card {
    transition: all var(--transition-base);
    border: none;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.card-img-top {
    transition: transform var(--transition-slow);
}

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

.evidence-card:hover .card-overlay {
    opacity: 1 !important;
}

/* Icon Styles */
.icon-wrapper {
    transition: all var(--transition-base);
}

.card:hover .icon-wrapper {
    transform: scale(1.1) rotate(5deg);
}

/* Metric Cards */
.metric-card {
    transition: all var(--transition-base);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
}

/* Section Styles */
section {
    position: relative;
}

.bg-light {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
}

/* Tab Styles */
.tab-button {
    background: none;
    border: none;
    padding: 1rem 2rem;
    font-family: var(--font-heading);
    font-weight: 500;
    color: var(--spu-grey);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-base);
    position: relative;
}

.tab-button.active,
.tab-button:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-panel {
    display: none;
    animation: fadeInUp 0.5s ease-out;
}

.tab-panel.active {
    display: block;
}

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

/* Footer Styles */
.footer {
    background: linear-gradient(135deg, var(--dark) 0%, #000 100%);
    color: white;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--secondary), transparent);
}

.footer-section h4 {
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all var(--transition-base);
    display: block;
    margin-bottom: 0.5rem;
}

.footer-section a:hover {
    color: var(--secondary);
    transform: translateX(5px);
}

/* Modal Styles */
.modal {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal-content {
    border: none;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
}

.close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    color: var(--spu-grey);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    z-index: 2001;
    transition: all var(--transition-base);
}

.close:hover {
    color: var(--primary);
    transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        min-height: 80vh;
        padding: 2rem 0;
    }
    
    .display-3 {
        font-size: 2.5rem;
    }
    
    .hero-card {
        transform: none !important;
        margin-bottom: 1rem;
    }
    
    .hero-card:hover {
        transform: translateY(-5px) !important;
    }
    
    .tab-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .display-3 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1.1rem;
    }
    
    .hero-stats .display-4 {
        font-size: 2rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
}

/* Desktop tweaks for slightly smaller displays (to avoid squashed look) */
@media (min-width: 992px) and (max-width: 1199.98px) {
    /* Use more of the horizontal space on medium-large desktops */
    .container, .container-sm, .container-md, .container-lg {
        max-width: 96% !important;
    }
    /* Tame large headings so they wrap less aggressively */
    .display-1 { font-size: 3.25rem; }
    .display-2 { font-size: 2.75rem; }
    .display-3 { font-size: 2.25rem; }
}

@media (min-width: 1200px) and (max-width: 1399.98px) {
    /* Expand container width on smaller 1080p/1366px screens */
    .container, .container-sm, .container-md, .container-lg, .container-xl {
        max-width: 95% !important;
    }
    .display-1 { font-size: 3.5rem; }
    .display-2 { font-size: 3rem; }
    .display-3 { font-size: 2.5rem; }
    .lead { font-size: 1.125rem; }
}

@media (min-width: 1400px) and (max-width: 1535.98px) {
    /* Slightly widen layout just below very large desktops */
    .container, .container-sm, .container-md, .container-lg, .container-xl, .container-xxl {
        max-width: 92% !important;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.bg-gradient-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--spu-gold-light) 100%);
}

.shadow-custom {
    box-shadow: 0 10px 40px rgba(139, 21, 56, 0.1);
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--primary), var(--secondary)) 1;
}

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

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

/* 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 keyboard navigation */
.btn:focus,
.nav-link:focus,
.tab-button:focus {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary: #000000;
        --secondary: #FFD700;
        --spu-grey: #333333;
    }
}

/* 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;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .hero-stats {
        display: none !important;
    }
    
    .hero-section {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

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

/* Selection Styles */
::selection {
    background: var(--secondary);
    color: var(--dark);
}

::-moz-selection {
    background: var(--secondary);
    color: var(--dark);
}