:root {
    --bg-color: #f8fafc;
    --sidebar-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -2px rgb(0 0 0 / 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

/* Landing Page Specifics */
body.landing-page {
    overflow-y: auto;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.landing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.05em;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--text-primary);
}

.hero-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: 4rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #1e293b, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 3rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.arrow {
    margin-left: 0.5rem;
    transition: transform 0.2s;
}

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

.landing-footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding-top: 2rem;
}

/* App Container (Viewer) */
.app-container {
    display: flex;
    height: 100%;
}

/* Sidebar */
.sidebar {
    width: 300px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    flex-shrink: 0;
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.back-link {
    font-size: 0.75rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.back-link:hover {
    color: var(--accent-color);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.control-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.select-wrapper {
    position: relative;
}

select {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-size: 0.875rem;
    appearance: none;
    cursor: pointer;
    transition: border-color 0.15s ease;
}

select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Custom Select Arrow */
.select-wrapper::after {
    content: "▼";
    font-size: 0.7rem;
    color: var(--text-secondary);
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.checkbox-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-item input {
    accent-color: var(--accent-color);
    width: 1rem;
    height: 1rem;
}

/* Content Area */
.content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    position: relative;
}

.hidden {
    display: none !important;
}

#loading-indicator {
    position: absolute;
    top: 1rem;
    right: 2rem;
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    z-index: 10;
}

/* Config Section */
.config-section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.config-section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.config-grid {
    display: grid;
    gap: 1.5rem;
}

.config-item h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.config-item pre {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    white-space: pre-wrap;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.task-prompt-item {
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.task-prompt-key {
    font-weight: 600;
    color: var(--accent-color);
}

/* Responses */
.responses-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.response-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.response-card:hover {
    box-shadow: var(--shadow-md);
}

.response-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.response-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-role {
    background-color: #e0f2fe;
    color: #0369a1;
}

.badge-task {
    background-color: #f1f5f9;
    color: #475569;
}

.badge-sample {
    background-color: #f0fdf4;
    color: #15803d;
}

.badge-rating-negative {
    background-color: #fee2e2;
    color: #991b1b;
}

.response-body {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.response-body p {
    margin-bottom: 1rem;
}

.response-body p:last-child {
    margin-bottom: 0;
}

.empty-state {
    text-align: center;
    padding: 4rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
        overflow-y: auto;
    }

    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .content {
        overflow-y: visible;
    }

    .hero-title {
        font-size: 2.5rem;
    }
}