/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #10b981;
    --background: #ffffff;
    --surface: #f8fafc;
    --surface-hover: #f1f5f9;
    --border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', Consolas, monospace;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #0f172a;
        --surface: #1e293b;
        --surface-hover: #334155;
        --border: #334155;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #64748b;
    }
}

/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p { margin-bottom: 1rem; }

/* Header */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.logo .emoji {
    font-size: 3rem;
}

.version {
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
}

.tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Main Content */
.main {
    padding: 3rem 0;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Generator Layout */
.generator-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 968px) {
    .generator-layout {
        grid-template-columns: 1fr;
    }
}

/* Panels */
.config-panel,
.results-panel {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.config-panel h2,
.results-panel h2 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-select,
.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--background);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.2s;
}

.form-select:focus,
.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

/* Radio Grid */
.radio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

@media (max-width: 968px) {
    .radio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .radio-grid {
        grid-template-columns: 1fr;
    }
}

.radio-card {
    position: relative;
    cursor: pointer;
}

.radio-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.radio-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--background);
    transition: all 0.2s;
    min-height: 120px;
    height: 120px;
}

.radio-card:hover .radio-content {
    border-color: var(--primary-color);
    background: var(--surface-hover);
}

.radio-card input[type="radio"]:checked + .radio-content {
    border-color: var(--primary-color);
    background: rgb(37 99 235 / 0.05);
}

.radio-content .emoji {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    flex-shrink: 0;
}

.radio-content .title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.radio-content .desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.2;
    margin-top: auto;
}

/* Dynamic Options */
.dynamic-options {
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    margin-top: 1.5rem;
}

/* Analytics */
.analytics {
    margin-bottom: 1.5rem;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.metric {
    text-align: center;
    padding: 1rem;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.metric-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Prompt Display */
.prompt-display {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

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

.prompt-header h3 {
    margin: 0;
    font-size: 1rem;
}

.copy-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.prompt-content {
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    min-height: 100px;
}

.prompt-content.generated {
    background: linear-gradient(135deg, rgb(37 99 235 / 0.05) 0%, rgb(16 185 129 / 0.05) 100%);
    border-left: 4px solid var(--primary-color);
}

.placeholder {
    color: var(--text-muted);
    font-style: italic;
    font-family: var(--font-sans);
}

/* Context Detection */
.context-detection,
.optimization-tips {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.context-detection h3,
.optimization-tips h3 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.context-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.context-item {
    background: var(--success);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 500;
}

.tips-list {
    list-style: none;
}

.tips-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.tips-list li::before {
    content: "💡";
    position: absolute;
    left: 0;
}

/* Prompt Variations */
.prompt-variations {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.prompt-variations h3 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.variations-container {
    display: grid;
    gap: 1rem;
}

.variation-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    transition: all 0.2s;
}

.variation-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.variation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.variation-name {
    font-weight: 600;
    color: var(--primary-color);
}

.variation-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.variation-prompt {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background: var(--background);
    padding: 0.75rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.variation-copy {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.variation-copy:hover {
    background: var(--surface-hover);
    border-color: var(--primary-color);
}

/* Export Options */
.export-options {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
}

.export-options h3 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.export-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

.btn-secondary {
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Features Section */
.features {
    margin-top: 4rem;
    padding: 3rem 2rem;
    background: var(--surface);
    border-radius: var(--radius-lg);
}

.features h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--background);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* Footer */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    margin-top: 4rem;
}

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

.footer-left p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-right {
    display: flex;
    gap: 1rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

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

/* Toast Notifications */
.toast {
    position: fixed;
    top: 2rem;
    right: 0rem;
    background: var(--success);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform 0.3s;
    z-index: 1000;
}

.toast.show {
    transform: translateX(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .logo .emoji {
        font-size: 2.5rem;
    }
    
    .config-panel,
    .results-panel {
        padding: 1.5rem;
    }
    
    .radio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .analytics-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .export-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
button:focus,
select:focus,
input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.radio-card:focus-within .radio-content {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}