:root {
    --bg-main: #0f172a;
    --bg-secondary: #1e293b;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #ec4899;
    --success: #10b981;
    --error: #ef4444;
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
}

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

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.app-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 3rem;
    border-right: 1px solid var(--glass-border);
    border-radius: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-item.active {
    border-left: 3px solid var(--primary);
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.1) 0%, transparent 100%);
}

.upload-section {
    margin-top: auto;
}

.sql-upload-panel {
    margin-top: 1rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.sql-upload-panel h4 {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-main);
}

.sql-upload-panel input {
    width: 100%;
    padding: 0.55rem 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.25);
    color: var(--text-main);
}

.sql-upload-panel input::placeholder {
    color: var(--text-muted);
}

.upload-area {
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-muted);
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
}

.upload-area i {
    color: var(--primary);
    margin-bottom: 1rem;
    transition: transform 0.3s;
}

.upload-area:hover i {
    transform: scale(1.1);
}

/* Main Content */
.main-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    height: 100vh;
    overflow-y: auto;
}

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

.top-bar h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary);
}

/* Welcome State */
.welcome-state {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    align-items: center;
    text-align: center;
    margin-top: 5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
}

.feature-card {
    padding: 2rem;
    text-align: left;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

/* Analysis State */
.analysis-state {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.hidden {
    display: none !important;
}

.progress-section {
    padding: 1.5rem;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.terminal-box {
    background: #000;
    color: #0f0;
    font-family: 'Consolas', monospace;
    padding: 1.5rem;
    border-radius: 8px;
    height: 300px;
    overflow-y: auto;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-wrap;
}

.loader {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
    margin-left: 10px;
    vertical-align: middle;
}

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

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.export-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

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

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* Panels */
.panels-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.panel {
    padding: 1.5rem;
}

.panel h3 {
    margin-bottom: 1.5rem;
    color: var(--text-main);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 0.5rem;
}

/* Markdown styling */
.markdown-body {
    line-height: 1.6;
    color: var(--text-muted);
}
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    color: var(--text-main);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}
.markdown-body strong {
    color: var(--text-main);
}
.markdown-body ul, .markdown-body ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}
.text-yellow {
    color: #fbbf24;
}

/* Custom stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.stat-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.5rem;
}

/* Styled lists */
.styled-list {
    list-style: none;
}

.styled-list li {
    padding: 1rem 0;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}

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

.styled-list li::before {
    content: '→';
    color: var(--secondary);
    margin-right: 0.5rem;
}

.empty-state {
    padding: 3rem;
    text-align: center;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
}