:root {
    /* Color scheme based on logo */
    --primary-bg: #1a1d2e;
    --secondary-bg: #252a3f;
    --accent-color: #6b7fd7;
    --accent-hover: #8699ff;
    --text-primary: #e8eaf6;
    --text-secondary: #b0b8d4;
    --border-color: #363c54;
    --success-color: #4caf50;
    --error-color: #f44336;
    --warning-color: #ff9800;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

/* Login Screen */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    animation: gradientShift 10s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.login-box {
    background: var(--secondary-bg);
    padding: var(--spacing-xl);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    text-align: center;
    max-width: 400px;
    width: 90%;
    animation: slideIn 0.6s ease;
    border: 1px solid var(--border-color);
}

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

.login-logo {
    width: 120px;
    height: auto;
    margin-bottom: var(--spacing-md);
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.login-box h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-color);
}

.login-box p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

#access-code {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 1.2rem;
    text-align: center;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--primary-bg);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-normal);
    letter-spacing: 0.5rem;
    font-family: monospace;
}

#access-code:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(107, 127, 215, 0.2);
}

#login-btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 1px;
}

#login-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(107, 127, 215, 0.4);
}

.error-message {
    color: var(--error-color);
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    min-height: 1.2rem;
}

/* Main App */
.hidden {
    display: none !important;
}

#main-app {
    display: grid;
    grid-template-columns: 280px 1fr;
    grid-template-rows: 70px 1fr;
    height: 100vh;
    animation: fadeIn 0.5s ease;
}

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

/* Header */
.header {
    grid-column: 1 / -1;
    background: white;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-logo {
    height: 60px;
    width: auto;
    transition: transform var(--transition-normal);
}

.header-logo:hover {
    transform: scale(1.05);
}

.header-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: #1a1a1a;
    font-weight: 600;
}

/* Sidebar */
.sidebar {
    background: white;
    border-right: 1px solid #e0e0e0;
    overflow-y: auto;
    padding: var(--spacing-md);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.nav-menu {
    padding: var(--spacing-md);
}

.nav-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #666;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.project-list {
    list-style: none;
}

.project-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: #333;
    font-weight: 500;
}

.project-item:hover {
    background: rgba(107, 127, 215, 0.1);
    color: #1a1a1a;
    transform: translateX(5px);
}

.project-item.active {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 15px rgba(107, 127, 215, 0.3);
}

.project-icon {
    width: 35px;
    height: 35px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    transition: transform var(--transition-fast);
}

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

.project-item.active .project-icon {
    background: rgba(255, 255, 255, 0.2);
}

/* Project Documentation Sections */
.project-docs {
    animation: contentFadeIn 0.4s ease;
}

.doc-section {
    margin-bottom: var(--spacing-xl);
}

.section-divider {
    height: 2px;
    background: linear-gradient(to right, transparent, var(--accent-color), transparent);
    margin: var(--spacing-xl) 0;
    opacity: 0.3;
}

/* Downloads Page */
.download-section {
    background: var(--secondary-bg);
    padding: var(--spacing-lg);
    border-radius: 10px;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--accent-color);
}

.download-section h2 {
    margin-top: 0;
    color: var(--accent-color);
}

.download-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.download-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
}

.download-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(107, 127, 215, 0.4);
}

.download-note {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Sub Navigation - Hidden now */
.sub-nav {
    display: none;
}

.sub-nav-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.doc-list {
    list-style: none;
}

.doc-item {
    padding: var(--spacing-xs) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-size: 0.95rem;
    animation: slideInLeft 0.3s ease;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.doc-item:hover {
    background: rgba(107, 127, 215, 0.1);
    color: var(--text-primary);
    transform: translateX(5px);
}

.doc-item.active {
    background: rgba(107, 127, 215, 0.2);
    color: var(--accent-hover);
    font-weight: 600;
}

/* Content Area */
.content-area {
    background: var(--primary-bg);
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
    animation: contentFadeIn 0.4s ease;
}

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

/* Documentation Styling */
.doc-content h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--accent-color);
}

.doc-content h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.doc-content h3 {
    font-size: 1.3rem;
    color: var(--accent-hover);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.doc-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.doc-content ul, .doc-content ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.doc-content li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.8;
}

.doc-content code {
    background: var(--secondary-bg);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--accent-hover);
    font-size: 0.9em;
}

.doc-content pre {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: 10px;
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--accent-color);
}

.doc-content pre code {
    background: none;
    padding: 0;
}

.doc-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    color: var(--text-secondary);
    font-style: italic;
}

.doc-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-md);
}

.doc-content th {
    background: var(--secondary-bg);
    padding: var(--spacing-sm);
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--accent-color);
}

.doc-content td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

/* Changelog specific styling */
.changelog-entry {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: 10px;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--accent-color);
    animation: slideInRight 0.4s ease;
}

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

.changelog-version {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.changelog-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.severity-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-right: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.severity-critical {
    background: var(--error-color);
    color: white;
}

.severity-high {
    background: var(--warning-color);
    color: white;
}

.severity-medium {
    background: #2196f3;
    color: white;
}

.severity-low {
    background: var(--success-color);
    color: white;
}

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

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

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

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

/* Mobile Responsive */
@media (max-width: 768px) {
    #main-app {
        grid-template-columns: 1fr;
        grid-template-rows: 60px auto 1fr;
    }
    
    .sidebar {
        grid-row: 2;
        max-height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .content-area {
        padding: var(--spacing-md);
    }
    
    .header-title {
        font-size: 1.2rem;
    }
    
    .doc-content h1 {
        font-size: 2rem;
    }
    
    .doc-content h2 {
        font-size: 1.5rem;
    }
}

/* Loading Animation */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
}

.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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