/* CSS Variables for theming */
:root {
    /* Light theme colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --accent-primary: #3b82f6;
    --accent-secondary: #1d4ed8;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-heavy: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --sponsorship-gradient: linear-gradient(135deg, #BD5FFF 0%, #FF6B9D 100%);
}

/* Dark theme colors */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --accent-primary: #60a5fa;
    --accent-secondary: #3b82f6;
    --border-color: #334155;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-heavy: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --sponsorship-gradient: linear-gradient(135deg, #BD5FFF 0%, #FF6B9D 100%);
}

/* Base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.theme-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.theme-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-medium);
}

.theme-btn .light-icon {
    display: block;
    color: #f59e0b;
}

.theme-btn .dark-icon {
    display: none;
    color: #6366f1;
}

[data-theme="dark"] .theme-btn .light-icon {
    display: none;
}

[data-theme="dark"] .theme-btn .dark-icon {
    display: block;
}

.mobile-menu-btn {
    display: none;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.mobile-menu-btn:hover {
    background: var(--bg-tertiary);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 80px;
    right: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-medium);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    min-width: 200px;
}

.mobile-menu::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 12px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--bg-primary);
    z-index: 1002;
}

.mobile-menu::after {
    content: '';
    position: absolute;
    top: -9px;
    right: 12px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--border-color);
    z-index: 1001;
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    padding: 0.5rem 0;
}

.mobile-nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav-link:last-child {
    border-bottom: none;
}

.mobile-nav-link:hover {
    color: var(--accent-primary);
    background: var(--bg-secondary);
}

/* Main Content - Single Page Layout */
.main-content {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.05;
    z-index: -1;
}

.main-content .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Hero Section */
.hero-section {
    margin-bottom: 3rem;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: center;
    margin-bottom: 2rem;
}

.hero-text {
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.contact-item i {
    color: var(--accent-primary);
    width: 20px;
}

.contact-item a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--accent-primary);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    margin: 0;
}

.floating-card {
    width: 200px;
    height: 200px;
    background: var(--gradient-primary);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 10px 20px rgba(0, 0, 0, 0.2);
    animation: float 6s ease-in-out infinite;
    position: relative;
    padding: 0;
    margin: 0;
    border: none;
    outline: none;
}

.floating-card i {
    font-size: 4rem;
    color: white;
}

.hero-logo {
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: contain;
    padding: 0;
    margin: 0;
    border: none;
    outline: none;
    display: block;
    border-radius: 30px;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.action-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

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

.action-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    overflow: hidden;
}

.action-icon i {
    font-size: 2rem;
    color: white;
}

.action-icon-img {
    width: 2rem;
    height: 2rem;
    max-width: 2rem;
    max-height: 2rem;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.action-card h3 {
    font-size: 1.25rem;
    margin: 0;
    color: var(--text-primary);
    font-weight: 600;
}

.action-card .btn {
    margin-top: auto;
    width: 100%;
    justify-content: center;
}

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

/* Button styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-light);
}

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

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



/* Section Headers - Common Styles */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header h2 i {
    color: var(--accent-primary);
    -webkit-text-fill-color: var(--accent-primary);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Projects Section */
.projects-section {
    background: var(--bg-secondary);
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.project-category {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-light);
}

.project-category h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.project-category h3 i {
    color: var(--accent-primary);
}

.project-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.project-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.project-list li:last-child {
    border-bottom: none;
}

.project-list li a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.project-list li a:hover {
    color: var(--accent-secondary);
}

.project-list li strong {
    color: var(--text-primary);
}

/* Flutter Packages Section */
.packages-section {
    background: var(--bg-secondary);
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}



.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.package-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.package-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.package-card-header h3 {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1.25rem;
    margin: 0;
}

.package-stats {
    color: var(--text-muted);
    font-size: 0.9rem;
    white-space: nowrap;
}

.package-description {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.package-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    margin-top: auto;
}

.package-link:hover {
    color: var(--accent-secondary);
}

.packages-footer {
    text-align: center;
    margin-top: 2rem;
}



/* Footer */
.footer {
    background: var(--bg-tertiary);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-text {
    text-align: left;
}

.footer-text p {
    color: var(--text-secondary);
    margin: 0;
}

.footer-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted) !important;
    margin-top: 0.25rem !important;
}

.footer-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.footer-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.footer-links i {
    font-size: 1.1rem;
}

.footer-icon {
    width: 1.1rem;
    height: 1.1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .navbar .container {
        padding: 1rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .main-content .container {
        padding: 1rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .floating-card {
        width: 150px;
        height: 150px;
    }
    
    .floating-card i {
        font-size: 3rem;
    }
    
    .hero-logo {
        width: 100%;
        height: 100%;
    }
    
    .quick-actions {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1rem;
    }
    
    .action-card {
        padding: 1rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .project-category {
        padding: 1rem;
    }
    
    .contact-info {
        gap: 0.5rem;
    }
    
    .contact-item {
        font-size: 0.9rem;
    }
    
    .packages-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .package-card {
        padding: 1.5rem;
    }
    
    .package-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .package-stats {
        font-size: 0.85rem;
    }
    

    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .footer-text {
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }

    /* Responsive adjustments for sponsorship elements */
    .floating-sponsorship-btn {
        bottom: 1rem;
        right: 1rem;
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .sponsorship-text {
        display: none;
    }
    
    .sponsorship-modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .sponsorship-modal-header {
        padding: 1rem 1.5rem;
    }
    
    .sponsorship-modal-body {
        padding: 1.5rem;
    }
    
    .modal-sponsorship-option {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .modal-option-icon {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .action-card {
        padding: 1rem;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
}

/* Smooth transitions for theme switching */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Floating Sponsorship Button */
.floating-sponsorship-btn {
    position: fixed;
    bottom: 4rem;
    right: 2rem;
    background: var(--sponsorship-gradient);
    color: white;
    border: none;
    border-radius: 50px;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: var(--shadow-medium);
    transition: all 0.3s ease;
    z-index: 999;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    backdrop-filter: blur(10px);
}

.floating-sponsorship-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-heavy);
}

.floating-sponsorship-btn i {
    font-size: 1.1rem;
}

.sponsorship-text {
    white-space: nowrap;
}

/* Sponsorship Modal */
.sponsorship-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sponsorship-modal.active {
    display: flex;
    opacity: 1;
}

.sponsorship-modal-content {
    background: var(--bg-primary);
    border-radius: 16px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-heavy);
    border: 1px solid var(--border-color);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.sponsorship-modal.active .sponsorship-modal-content {
    transform: scale(1);
}

.sponsorship-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.sponsorship-modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.modal-close-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sponsorship-modal-body {
    padding: 2rem;
}

.sponsorship-modal-body > p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.sponsorship-modal-options {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.modal-sponsorship-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.modal-sponsorship-option:hover {
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.modal-option-icon {
    width: 48px;
    height: 48px;
    background: var(--sponsorship-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    flex-shrink: 0;
}

.modal-option-content {
    flex: 1;
}

.modal-option-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.modal-option-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.modal-action-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Pulse animation for floating sponsorship button */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(189, 95, 255, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(189, 95, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(189, 95, 255, 0);
    }
}