/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

/* Theme Variables */
:root {
    /* Light Theme (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --border-color: #dfe6e9;
    --card-bg: #ffffff;
    --card-border: #dfe6e9;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --nav-border: #dfe6e9;
    --footer-bg: #f8f9fa;
    --footer-border: #dfe6e9;
    --link-color: #0984e3;
    --link-hover: #74b9ff;
    --btn-primary: #0984e3;
    --btn-primary-hover: #74b9ff;
    --btn-outline: #0984e3;
    --btn-outline-hover: #74b9ff;
    --input-bg: #ffffff;
    --input-border: #dfe6e9;
    --input-focus: #74b9ff;
    --dropdown-bg: #ffffff;
    --dropdown-border: #dfe6e9;
    --dropdown-hover: #f8f9fa;
    --tooltip-bg: #2d3436;
    --tooltip-text: #ffffff;
    --heading-font: 'Poppins', sans-serif;
    --body-font: 'Inter', sans-serif;
    --gradient-primary: linear-gradient(135deg, #0984e3 0%, #74b9ff 100%);
    --gradient-secondary: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition-base: all 0.3s ease;
    --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --primary-color: #6c5ce7;
    --secondary-color: #a29bfe;
    --background-dark: #121212;
    --surface-dark: #1e1e1e;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d3436;
    --text-primary: #f5f6fa;
    --text-secondary: #dcdde1;
    --border-color: #576574;
    --card-bg: #2d3436;
    --card-border: #576574;
    --nav-bg: rgba(45, 52, 54, 0.95);
    --nav-border: #576574;
    --footer-bg: #2d3436;
    --footer-border: #576574;
    --link-color: #74b9ff;
    --link-hover: #0984e3;
    --btn-primary: #0984e3;
    --btn-primary-hover: #74b9ff;
    --btn-outline: #74b9ff;
    --btn-outline-hover: #0984e3;
    --input-bg: #576574;
    --input-border: #747d8c;
    --input-focus: #74b9ff;
    --dropdown-bg: #2d3436;
    --dropdown-border: #576574;
    --dropdown-hover: #576574;
    --tooltip-bg: #f5f6fa;
    --tooltip-text: #2d3436;
    --gradient-primary: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    --gradient-secondary: linear-gradient(135deg, #2d3436 0%, #1a1a1a 100%);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
    background-color: var(--background-dark);
    color: var(--text-primary);
}

[data-theme="dark"] .card {
    background-color: var(--surface-dark);
    border-color: var(--border-color);
}

[data-theme="dark"] .list-group-item {
    background-color: var(--surface-dark);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .list-group-item:hover {
    background-color: #2d2d2d;
}

[data-theme="dark"] .text-muted {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

[data-theme="dark"] .btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

[data-theme="dark"] .feature-icon {
    color: var(--primary-color);
}

/* Theme Transitions */
body {
    transition: var(--transition-base);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Navigation */
.navbar {
    font-family: var(--heading-font);
    background-color: var(--nav-bg) !important;
    border-bottom: 1px solid var(--nav-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand img {
    height: 32px;
    width: auto;
}

.nav-link {
    font-weight: 500;
    position: relative;
    padding: 0.5rem 1rem;
    color: var(--text-primary) !important;
}

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

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

.dropdown-menu {
    background-color: var(--dropdown-bg);
    border-color: var(--dropdown-border);
}

.dropdown-item {
    color: var(--text-primary);
}

.dropdown-item:hover {
    background-color: var(--dropdown-hover);
    color: var(--text-primary);
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    border-radius: 1rem;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Buttons */
.btn {
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
    transform: translateY(-100%);
    transition: var(--transition-smooth);
}

.btn:hover::before {
    transform: translateY(0);
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
}

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

.btn-outline-primary {
    color: var(--btn-outline);
    border: 2px solid var(--btn-outline);
    background: transparent;
}

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

/* Forms */
.form-control {
    font-family: var(--body-font);
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    transition: var(--transition-base);
}

.form-control:focus {
    background-color: var(--input-bg);
    border-color: var(--input-focus);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(116, 185, 255, 0.25);
}

/* Footer */
.footer {
    font-family: var(--body-font);
    background-color: var(--footer-bg);
    border-top: 1px solid var(--footer-border);
    position: relative;
    overflow: hidden;
    margin-top: auto;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-secondary);
    opacity: 0.1;
    z-index: 0;
}

.footer h5, .footer h6 {
    font-weight: 600;
    position: relative;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--btn-primary);
    color: var(--bg-primary);
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* Tooltips */
.tooltip {
    --bs-tooltip-bg: var(--tooltip-bg);
    --bs-tooltip-color: var(--tooltip-text);
}

/* List Groups */
.list-group-item {
    font-family: var(--body-font);
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-primary);
    transition: var(--transition-base);
    border-radius: 0.5rem !important;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.list-group-item:hover {
    background-color: var(--dropdown-hover);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.list-group-item i {
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--link-hover);
}

/* Text Colors */
.text-primary {
    color: var(--link-color) !important;
}

.text-muted {
    color: var(--text-secondary) !important;
}

/* Social Icons */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    font-size: 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
}

.social-links a:hover {
    color: var(--link-color);
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Newsletter Form */
.newsletter-form .form-control {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
}

.newsletter-form .form-control:focus {
    background-color: var(--input-bg);
    border-color: var(--input-focus);
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    background: var(--gradient-secondary);
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.05;
    z-index: 0;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    position: relative;
}

.hero-image {
    max-width: 100%;
    height: auto;
    animation: float 6s ease-in-out infinite;
}

/* Features Section */
.features-section {
    background-color: var(--bg-secondary);
    padding: 6rem 0;
    position: relative;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-secondary);
    opacity: 0.1;
    z-index: 0;
}

.features-section .feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--link-color);
    transition: var(--transition-smooth);
}

.features-section .feature-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

.features-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    position: relative;
}

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

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

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

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

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .features-section {
        padding: 3rem 0;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }

    .card {
        margin-bottom: 1rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--link-color);
    border-radius: 5px;
}

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

/* GitHub Pages Specific */
.github-corner {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1000;
}

.github-corner svg {
    fill: var(--link-color);
    color: var(--bg-primary);
    transition: var(--transition-base);
}

.github-corner:hover svg {
    fill: var(--link-hover);
    transform: scale(1.1);
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .github-corner,
    .theme-toggle {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .card {
        break-inside: avoid;
        border: 1px solid #ddd;
    }
}

/* Modern Font Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

body {
    font-family: 'Inter', sans-serif;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
}

.lead {
    font-weight: 300;
    letter-spacing: 0.3px;
}

/* Smooth transitions */
.card, .list-group-item, .btn {
    transition: all 0.3s ease;
}

/* Enhanced hover effects */
.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Modern button styles */
.btn {
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
}

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

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

/* Card enhancements */
.card {
    border-radius: 12px;
    overflow: hidden;
}

/* List group enhancements */
.list-group-item {
    border-radius: 8px !important;
    margin-bottom: 4px;
    padding: 0.8rem 1rem;
}

/* Feature section enhancements */
.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}