:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-card-hover: rgba(51, 65, 85, 0.8);
    --border-color: rgba(255, 255, 255, 0.1);
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --accent: #10b981;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --transition: all 0.25s ease-in-out;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-main);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.12) 0px, transparent 50%);
    background-attachment: fixed;
    min-height: 100vh;
    line-height: 1.5;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: fixed;
    height: 100vh;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.logo-icon {
    font-size: 28px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.brand-text h2 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
}

.badge {
    font-size: 10px;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid rgba(99, 102, 241, 0.4);
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(99, 102, 241, 0.05));
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.ai-status-card {
    margin-bottom: 12px;
    padding: 10px 12px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.ai-status-card:hover {
    background: rgba(16, 185, 129, 0.2);
}

.ai-status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 8px #10b981;
}

.ai-status-info h4 {
    font-size: 12px;
    font-weight: 600;
}

.ai-status-info p {
    font-size: 10px;
    color: var(--text-muted);
}

.user-profile-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #10b981, #3b82f6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 12px;
}

.user-info h4 {
    font-size: 13px;
    font-weight: 600;
}

.user-info p {
    font-size: 11px;
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    margin-left: 260px;
    flex-grow: 1;
    padding: 32px 40px;
    max-width: 1300px;
}

/* Top Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.header-title h1 {
    font-family: var(--font-heading);
    font-size: 26px;
    font-weight: 700;
}

.header-title p {
    font-size: 14px;
    color: var(--text-muted);
}

.quick-stats {
    display: flex;
    gap: 14px;
}

.stat-pill {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-pill.accent {
    border-color: rgba(16, 185, 129, 0.4);
    background: rgba(16, 185, 129, 0.1);
}

.stat-num {
    font-size: 18px;
    font-weight: 700;
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
}

/* Tab Pages */
.tab-page {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Buttons */
.btn {
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn.primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn.secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Hero Banner */
.hero-banner {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(16, 185, 129, 0.15));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.hero-text h2 {
    font-family: var(--font-heading);
    font-size: 22px;
    margin-bottom: 8px;
}

.hero-text p {
    color: var(--text-muted);
    font-size: 14px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 12px;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(10px);
}

.card h3 {
    font-family: var(--font-heading);
    font-size: 16px;
    margin-bottom: 16px;
}

.category-breakdown {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
}

.cat-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 14px;
}

.cat-count {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

/* Ingestion Module */
.module-header {
    margin-bottom: 24px;
}

.module-header h2 {
    font-family: var(--font-heading);
    font-size: 22px;
}

.module-header p {
    color: var(--text-muted);
    font-size: 14px;
}

.upload-zone {
    border: 2px dashed rgba(99, 102, 241, 0.4);
    background: rgba(99, 102, 241, 0.05);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    margin-bottom: 32px;
    transition: var(--transition);
}

.upload-zone:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
}

.upload-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.upload-zone h3 {
    margin-bottom: 6px;
}

.upload-zone p {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 20px;
}

.spinner-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
    color: #a5b4fc;
    font-size: 13px;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(99, 102, 241, 0.3);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.file-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: var(--transition);
    cursor: pointer;
}

.file-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.file-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-icon {
    font-size: 24px;
}

.item-cat-badge {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 600;
}

.file-card h4 {
    font-size: 14px;
    font-weight: 600;
}

.file-meta {
    font-size: 12px;
    color: var(--text-muted);
}

/* Categorization Filter */
.category-filter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.cat-tab {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.cat-tab.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 18px;
}

/* Relationship Engine Module */
.relationship-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.graph-visual-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.graph-canvas {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 20px;
    min-height: 380px;
    align-content: flex-start;
    background: rgba(15, 23, 42, 0.5);
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color);
}

.node-chip {
    padding: 10px 16px;
    border-radius: 20px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.4);
    color: var(--text-main);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.node-chip:hover, .node-chip.active {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

.connections-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 16px;
}

.conn-item {
    background: rgba(255, 255, 255, 0.04);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Journey Timeline Module */
.timeline-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}

.year-filter {
    padding: 6px 14px;
    border-radius: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
}

.year-filter.active {
    background: var(--accent);
    color: #0f172a;
    font-weight: 600;
    border-color: var(--accent);
}

.timeline-vertical {
    position: relative;
    padding-left: 28px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.timeline-vertical::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 22px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-dark);
}

.timeline-year {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.timeline-item h4 {
    font-size: 15px;
    margin-bottom: 4px;
}

.timeline-item p {
    font-size: 13px;
    color: var(--text-muted);
}

/* Smart Retrieval Module */
.search-box-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 28px;
}

.search-input-group {
    display: flex;
    align-items: center;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: var(--radius-md);
    padding: 6px 12px;
    gap: 12px;
    margin-bottom: 16px;
}

.search-input-group input {
    flex-grow: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 15px;
    padding: 8px 0;
}

.prompt-chips {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.chip-label {
    font-size: 12px;
    color: var(--text-muted);
}

.chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 14px;
    font-size: 12px;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.chip:hover {
    background: rgba(99, 102, 241, 0.2);
    color: var(--text-main);
}

.ai-answer-card {
    margin-bottom: 24px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(16, 185, 129, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.ai-answer-card h4 {
    color: #a5b4fc;
    margin-bottom: 6px;
}

.ai-answer-card p {
    font-size: 14px;
    line-height: 1.6;
}

/* Modal */
.modal-overlay[hidden] {
    display: none !important;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-card {
    background: #1e293b;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 600px;
    padding: 24px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
}

.modal-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--primary);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.modal-content-box {
    background: rgba(15, 23, 42, 0.6);
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 16px 0;
}

.modal-content-box h4 {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.skills-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.tag {
    background: rgba(255, 255, 255, 0.08);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
}