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

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

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

a {
    color: var(--primary);
    text-decoration: none;
}

/* Navbar */
.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand a {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 14px;
    transition: color 0.2s;
}

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

.nav-user {
    color: var(--text);
    font-weight: 500;
}

.btn-logout {
    color: var(--danger) !important;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:hover {
    background: var(--bg);
}

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

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

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

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

.btn-sm {
    padding: 4px 12px;
    font-size: 13px;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.2s;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-lg {
    max-width: 700px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.required {
    color: var(--danger);
}

/* Auth */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 24px;
}

.auth-link {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 4px 0 12px;
}

.stat-link {
    font-size: 13px;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 16px;
}

.card-body {
    padding: 16px;
    font-size: 14px;
    color: var(--text-secondary);
}

.card-body p {
    margin-bottom: 4px;
}

.card-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
}

.card-desc {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    background: var(--bg);
    color: var(--text-secondary);
}

.badge-public { background: #dcfce7; color: #166534; }
.badge-private { background: #f1f5f9; color: #64748b; }
.badge-active { background: #dcfce7; color: #166534; }
.badge-inactive { background: #fef2f2; color: #991b1b; }

/* Tags */
.tags {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.tag {
    background: var(--bg);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px;
    color: var(--text-secondary);
}

/* Info Box */
.info-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 24px;
    font-size: 14px;
}

.info-box code {
    background: #dbeafe;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

.code-block {
    display: block;
    background: #f1f5f9;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 13px;
    margin-top: 4px;
    word-break: break-all;
}

/* Welcome */
.welcome {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* Error Page */
.error-page {
    text-align: center;
    padding: 100px 20px;
}

.error-page h1 {
    font-size: 72px;
    color: var(--text-secondary);
}

/* Chat */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 80px);
    max-width: 800px;
    margin: 0 auto;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.chat-info h2 {
    font-size: 18px;
}

.chat-model {
    font-size: 12px;
    color: var(--text-secondary);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
}

.message {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    padding: 0 4px;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}

.message-user .message-avatar {
    background: var(--primary);
    color: white;
}

.message-assistant .message-avatar {
    background: var(--success);
    color: white;
}

.message-system .message-avatar {
    background: var(--text-secondary);
    color: white;
}

.message-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 14px;
    font-size: 14px;
    line-height: 1.6;
    max-width: 80%;
    word-break: break-word;
}

.message-user {
    flex-direction: row-reverse;
}

.message-user .message-content {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.chat-input {
    display: flex;
    gap: 8px;
    padding: 12px 0;
    border-top: 1px solid var(--border);
}

.chat-input textarea {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    resize: none;
    font-family: inherit;
}

.chat-input textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .nav-links {
        gap: 12px;
        font-size: 13px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }
}

/* AI Generate Box */
.ai-generate-box {
    background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
    border: 2px solid #93c5fd;
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 32px;
}

.ai-generate-box h3 {
    color: var(--primary);
    margin-bottom: 8px;
}

.ai-generate-box > p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

.ai-generate-input textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 12px;
}

.ai-generate-input textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.ai-generate-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.ai-generate-actions select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
}

.ai-status {
    margin-top: 12px;
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 14px;
}

.ai-loading {
    background: #eff6ff;
    color: #1d4ed8;
    border: 1px solid #bfdbfe;
}

.ai-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.ai-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}