/* CSS Custom Properties for Theme Management */
:root {
    /* Light Theme Colors */
    --primary-color: #ffc000;
    --primary-light: #ffcc33;
    --primary-dark: #e6ad00;
    --secondary-color: #000000;
    --accent-color: #50C878;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --gray-100: #F1F3F4;
    --gray-200: #E8EAED;
    --gray-300: #DADCE0;
    --gray-400: #BDC1C6;
    --gray-500: #9AA0A6;
    --gray-600: #80868B;
    --gray-700: #5F6368;
    --gray-800: #3C4043;
    --gray-900: #202124;
    
    /* Background Colors */
    --bg-primary: var(--white);
    --bg-secondary: var(--light-gray);
    --bg-tertiary: var(--gray-100);
    
    /* Text Colors */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-tertiary: var(--gray-600);
    --text-muted: var(--gray-500);
    
    /* Border Colors */
    --border-light: var(--gray-200);
    --border-medium: var(--gray-300);
    
    /* Shadow Colors */
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-heavy: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.025em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

/* Mobile Navigation */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* Main Content */
.main {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
}

/* Hero Section */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.05em;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-weight: 500;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Resources Section */
.resources {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-primary);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--text-primary);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.resource-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: var(--primary-color);
}

.resource-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.resource-icon i {
    font-size: var(--font-size-2xl);
    color: var(--white);
}

.resource-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.resource-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-fast);
    cursor: pointer;
    font-size: var(--font-size-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

.btn-linkedin {
    background: linear-gradient(135deg, #0077B5, #005885);
    color: var(--white);
}

.btn-linkedin:hover {
    background: linear-gradient(135deg, #005885, #003d5c);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 119, 181, 0.3);
}

.btn-preview {
    background: linear-gradient(135deg, var(--text-secondary), var(--text-tertiary));
    color: var(--white);
    margin-left: var(--spacing-sm);
}

.btn-preview:hover {
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.resource-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}


/* Comments Section */
.comments {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-secondary);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    z-index: 1;
}


/* About Page Styles */
.about-hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
}

.about-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.about-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.team {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-primary);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.team-member {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-medium);
}

.member-image {
    margin-bottom: var(--spacing-lg);
}

.member-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
}

.team-member:hover .member-photo {
    border-color: var(--primary-color);
}

.member-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.member-role {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.member-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.mission {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-secondary);
}

.mission-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.mission-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-2xl) 0;
    position: relative;
    z-index: 2;
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-brand h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-social p {
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: var(--transition-normal);
        box-shadow: 0 4px 8px var(--shadow-light);
        padding: var(--spacing-lg) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .hero-description {
        font-size: var(--font-size-base);
    }

    .resources-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

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

    .resource-card,
    .team-member {
        padding: var(--spacing-lg);
    }

}

/* Theme Switching Support */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-tertiary: #999999;
    --text-muted: #666666;
    --border-light: #404040;
    --border-medium: #555555;
}

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

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

/* Print styles */
@media print {
    .header,
    .footer,
    .comments {
        display: none;
    }
    
    .main {
        margin-top: 0;
    }
}