:root {
    /* Primary Colors - Based on Logo */
    --primary-blue: #4A90E2;
    --primary-blue-light: #5BA0F2;
    --primary-blue-dark: #3A7BC8;
    
    /* Complementary Colors */
    --accent-orange: #FF8C42;
    --accent-purple: #7B68EE;
    --success-green: #4ECDC4;
    --warning-orange: #FFB347;
    --danger-red: #FF6B6B;
    
    /* Light Theme Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFB;
    --bg-tertiary: #EFF4F7;
    --text-primary: #1A1A1A;
    --text-secondary: #4A5568;
    --text-tertiary: #718096;
    --border-color: #E2E8F0;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(74, 144, 226, 0.08);
    --shadow-md: 0 4px 12px rgba(74, 144, 226, 0.12);
    --shadow-lg: 0 8px 24px rgba(74, 144, 226, 0.16);
}

body.dark-theme {
    /* Dark Theme Colors */
    --bg-primary: #0F1419;
    --bg-secondary: #1A1F2E;
    --bg-tertiary: #252D3D;
    --text-primary: #F7FAFC;
    --text-secondary: #CBD5E0;
    --text-tertiary: #A0AEC0;
    --border-color: #2D3748;
    
    /* Adjusted Primary for Dark Theme */
    --primary-blue: #5BA0F2;
    --primary-blue-light: #7BB4F6;
    --primary-blue-dark: #4A90E2;
    
    /* Shadows for Dark Theme */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: #0F1419;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px;
    width: auto;
    filter: brightness(1.1);
    transition: filter 0.3s;
}

.logo-img:hover {
    filter: brightness(1.3);
}


.nav-links {
    display: flex;
    list-style: none;
    gap: 48px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: #f5f5f7;
    font-weight: 400;
    font-size: 17px;
    line-height: 1.2;
    letter-spacing: -0.022em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.6, 1);
    position: relative;
    padding: 8px 0;
}

.nav-links a:hover {
    color: var(--primary-blue-light);
}

.nav-links a[onclick*="logout"] {
    color: #FF6B6B;
}

.nav-links a[onclick*="logout"]:hover {
    color: #FF8787;
}

.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: rotate(45deg);
    pointer-events: none;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background-color: white;
    color: var(--primary-blue);
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    background-color: var(--bg-secondary);
}

.software-list {
    padding: 100px 30px;
    background-color: var(--bg-secondary);
}

.software-header {
    margin-bottom: 50px;
}

.software-header h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.search-filter-container {
    display: flex;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    transition: all 0.3s;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.category-filter {
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s;
}

.category-filter:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    align-items: stretch;
}

.software-card {
    background-color: var(--bg-primary);
    border-radius: 16px;
    padding: 30px;
    transition: all 0.3s;
    position: relative;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.app-icon {
    margin-bottom: 25px;
    text-align: center;
}

.icon-placeholder {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    color: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.status-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 8px 16px;
    border-radius: 980px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-available {
    background-color: var(--success-green);
    color: white;
}

.badge-approval {
    background-color: var(--warning-orange);
    color: white;
}

.badge-license {
    background-color: var(--accent-purple);
    color: white;
}

.software-card h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.version {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 18px;
}

.description {
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.6;
    min-height: 72px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.card-bottom {
    margin-top: auto;
}

.app-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 25px;
    padding: 20px;
    background-color: var(--bg-tertiary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.detail-item {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.status-text {
    padding: 6px 14px;
    border-radius: 980px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    display: inline-block;
}

.status-text.badge-available {
    background-color: var(--success-green);
    color: white;
}

.status-text.badge-approval {
    background-color: var(--warning-orange);
    color: white;
}

.status-text.badge-license {
    background-color: var(--accent-purple);
    color: white;
}

.features {
    list-style: none;
    margin-bottom: 20px;
}

.features li {
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
    color: #515154;
}

.features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #34c759;
    font-weight: bold;
}

.requirements {
    font-size: 0.85rem;
    color: #86868b;
    margin-bottom: 20px;
}

.download-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.4);
    background: linear-gradient(135deg, var(--primary-blue-light) 0%, var(--primary-blue) 100%);
}

.request-section {
    padding: 80px 20px;
    background-color: #f5f5f7;
}

.request-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #1d1d1f;
}

.request-form {
    max-width: 600px;
    margin: 0 auto;
    background-color: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
    background-color: var(--bg-primary);
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: white;
    border: none;
    padding: 16px 24px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.4);
    background: linear-gradient(135deg, var(--primary-blue-light) 0%, var(--primary-blue) 100%);
}

.form-message {
    display: none;
    margin-top: 20px;
    text-align: center;
}

.form-message .success {
    color: #34c759;
    font-weight: 500;
    padding: 15px;
    background-color: #e8f5e9;
    border-radius: 8px;
}

footer {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 40px 20px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content p {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.footer-content p:last-child {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(10px);
}

.modal-content {
    background-color: var(--bg-primary);
    margin: 5% auto;
    padding: 40px;
    border-radius: 20px;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    position: relative;
    animation: modalSlideIn 0.3s ease-out;
    border: 1px solid var(--border-color);
}

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

.close {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 35px;
    font-weight: 300;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--primary-blue);
}

.modal-content h2 {
    color: var(--text-primary);
    margin-bottom: 30px;
    font-size: 2rem;
}

.modal-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.modal-form .form-group {
    margin-bottom: 20px;
}

/* Theme Toggle Button */
.theme-toggle {
    margin: 0;
}

.theme-btn {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 980px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.6, 1);
    color: #f5f5f7;
    backdrop-filter: blur(20px);
}

.theme-btn:hover {
    border-color: var(--primary-blue-light);
    background-color: rgba(91, 160, 242, 0.2);
    color: var(--primary-blue-light);
}

.theme-btn svg {
    transition: transform 0.3s;
}

.theme-btn:hover svg {
    transform: rotate(15deg);
}

/* Logout Button Styling */
.logout-btn-main {
    background: #ff3b30;
    border: 1px solid #ff3b30;
    border-radius: 980px;
    color: white;
    padding: 8px 20px;
    cursor: pointer;
    font-size: 17px;
    font-weight: 400;
    letter-spacing: -0.022em;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.6, 1);
    text-decoration: none;
    font-family: inherit;
    height: 36px;
    backdrop-filter: blur(20px);
}

.logout-btn-main:hover {
    background: #ff453a;
    border-color: #ff453a;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(255, 59, 48, 0.25);
}

.logout-btn-main svg {
    transition: transform 0.3s ease;
}

.logout-btn-main:hover svg {
    transform: translateX(2px);
}

body.dark-theme .logout-btn-main {
    background: #ff453a;
    border-color: #ff453a;
}

body.dark-theme .logout-btn-main:hover {
    background: #ff6b6b;
    border-color: #ff6b6b;
    box-shadow: 0 4px 12px rgba(255, 69, 58, 0.4);
}

/* Dark Theme Specific Overrides */


body.dark-theme .hero {
    background: linear-gradient(135deg, var(--primary-blue-dark) 0%, #1a2332 100%);
}

body.dark-theme .cta-button {
    background-color: var(--primary-blue-light);
    color: white;
}

body.dark-theme .cta-button:hover {
    background-color: var(--primary-blue);
}


body.dark-theme .software-card:hover {
    box-shadow: 0 10px 30px rgba(91, 160, 242, 0.2);
}

body.dark-theme .form-message .success {
    background-color: rgba(78, 205, 196, 0.15);
    color: var(--success-green);
}

body.dark-theme footer {
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    .nav-container {
        height: auto;
        padding: 16px 20px;
        flex-direction: column;
        gap: 24px;
    }
    
    .nav-links {
        gap: 32px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-links a {
        font-size: 16px;
    }
    
    .logout-btn-main {
        font-size: 16px;
        padding: 8px 18px;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .software-grid {
        grid-template-columns: 1fr;
    }
    
    .request-form {
        padding: 30px 20px;
    }
    
    .search-filter-container {
        flex-direction: column;
    }
    
    .search-input, .category-filter {
        width: 100%;
    }
    
    .modal-content {
        margin: 10% 20px;
        padding: 30px 20px;
    }
    
    .modal-form .form-row {
        grid-template-columns: 1fr;
    }
}