/* ========================================
   GLOBAL STYLES & VARIABLES
   ======================================== */

:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --accent: #ec4899;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --border: #334155;
    --border-light: #475569;

    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

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

/* ========================================
   LOGIN PAGE
   ======================================== */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    50% {
        transform: translate(-20px, 20px) rotate(180deg);
    }
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-lg);
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

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

.login-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--bg-primary);
    margin-bottom: var(--spacing-sm);
}

.login-header p {
    color: #64748b;
    font-size: 0.95rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 600;
    color: var(--bg-secondary);
    font-size: 0.875rem;
}

.form-group input {
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: white;
    color: var(--bg-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.error-message {
    padding: var(--spacing-md);
    background: #fee2e2;
    color: #991b1b;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    border-left: 4px solid var(--error);
}

.btn-primary {
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

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

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    transition: transform var(--transition-base);
}

.btn-primary:hover .btn-icon {
    transform: translateX(4px);
}

.login-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

/* ========================================
   DASHBOARD PAGE
   ======================================== */

.dashboard-page {
    background: var(--bg-primary);
}

.dashboard-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-primary);
}

.logo svg {
    color: var(--primary);
}

.logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.search-box {
    margin: var(--spacing-lg);
    position: relative;
    display: flex;
    align-items: center;
}

.search-box svg {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-primary);
}

.search-options {
    display: flex;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.radio-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.radio-option input[type="radio"] {
    cursor: pointer;
}

.file-tree {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.file-tree::-webkit-scrollbar {
    width: 6px;
}

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

.file-tree::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.file-tree::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

.tree-item {
    margin-bottom: var(--spacing-xs);
}

.tree-folder {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tree-folder:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tree-folder.active {
    background: var(--primary);
    color: white;
}

.tree-folder svg {
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.tree-folder.expanded svg {
    transform: rotate(90deg);
}

.tree-children {
    margin-left: var(--spacing-lg);
    display: none;
}

.tree-children.show {
    display: block;
}

.tree-file {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.tree-file:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tree-file.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    font-weight: 500;
}

/* Project Tree Styles */
.project-icon {
    font-size: 1.125rem;
}

.project-name {
    flex: 1;
    font-weight: 600;
}

.doc-count {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tree-folder.expanded+.tree-children .doc-count {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
}

/* Search Results Styles */
.search-summary {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-md);
    color: var(--primary-light);
    font-size: 0.875rem;
}

.search-summary svg {
    flex-shrink: 0;
    color: var(--primary);
}

.search-no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--text-muted);
}

.search-no-results svg {
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.search-no-results p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.search-no-results small {
    font-size: 0.875rem;
    color: var(--text-muted);
}


.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.btn-logout {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.btn-logout:hover {
    background: var(--error);
    border-color: var(--error);
    color: white;
}

/* Main Content */
.main-content {
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

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

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Welcome Section */
.welcome-section {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.welcome-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-section>p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
}

.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    max-width: 600px;
    margin: 0 auto;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 2.5rem;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-info p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Document Viewer */
.document-viewer {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.viewer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.viewer-header h1 {
    font-size: 2rem;
    font-weight: 700;
}

.viewer-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

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

.viewer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.viewer-content.with-toc {
    grid-template-columns: 250px 1fr;
}

.toc {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    max-height: calc(100vh - 300px);
    overflow-y: auto;
    position: sticky;
    top: var(--spacing-lg);
}

.toc h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.toc nav a {
    display: block;
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.toc nav a:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.toc nav a.active {
    color: var(--primary);
    font-weight: 500;
}

/* Markdown Content */
.markdown-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    line-height: 1.8;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    line-height: 1.3;
}

.markdown-content h1 {
    font-size: 2.25rem;
    color: var(--text-primary);
}

.markdown-content h2 {
    font-size: 1.875rem;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border);
    padding-bottom: var(--spacing-sm);
}

.markdown-content h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.markdown-content h4 {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.markdown-content h5 {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.markdown-content h6 {
    font-size: 1rem;
    color: var(--text-muted);
}

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

.markdown-content a {
    color: var(--primary-light);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-fast);
}

.markdown-content a:hover {
    border-bottom-color: var(--primary-light);
}

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

.markdown-content li {
    margin-bottom: var(--spacing-sm);
}

.markdown-content code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--primary-light);
}

.markdown-content pre {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    overflow-x: auto;
}

.markdown-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
}

.markdown-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    color: var(--text-muted);
    font-style: italic;
}

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

.markdown-content th,
.markdown-content td {
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    text-align: left;
}

.markdown-content th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content td {
    color: var(--text-secondary);
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.markdown-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: var(--spacing-xl) 0;
}

/* Loading Spinner */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    gap: var(--spacing-md);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        bottom: 0;
        width: 280px;
        z-index: 1000;
        transition: left var(--transition-base);
    }

    .sidebar.show {
        left: 0;
    }

    .viewer-content.with-toc {
        grid-template-columns: 1fr;
    }

    .toc {
        display: none;
    }
}