:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --accent-color: #14b8a6;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --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', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    height: 60px;
    width: auto;
    object-fit: contain;
    border-radius: 8px;
}

.header-text h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* Intro Section */
.intro-section {
    padding: var(--spacing-xl) 0;
}

.intro-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.intro-card h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
}

.intro-card p:last-child {
    margin-bottom: 0;
}

/* Playground Section */
.playground-section {
    padding: var(--spacing-xl) 0;
}

.playground-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.playground-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.playground-input,
.playground-output {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.api-key-section {
    margin-bottom: var(--spacing-md);
}

.api-key-section label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.input-with-toggle {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-toggle input {
    flex: 1;
    padding-right: 3rem;
}

.toggle-btn {
    position: absolute;
    right: var(--spacing-xs);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

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

.playground-input label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.playground-input input[type="password"],
.playground-input input[type="text"],
.playground-input textarea {
    width: 100%;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.playground-input input[type="password"]:focus,
.playground-input input[type="text"]:focus,
.playground-input textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.playground-input textarea {
    resize: vertical;
    min-height: 120px;
    margin-bottom: var(--spacing-md);
}

.help-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.preset-btn {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(236, 72, 153, 0.2) 100%);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.preset-btn:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3) 0%, rgba(236, 72, 153, 0.3) 100%);
    border-color: var(--primary-color);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.preset-btn.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-color: var(--primary-color);
    color: white;
}

.generate-btn,
.copy-config-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.generate-btn:hover,
.copy-config-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.copy-config-btn {
    margin-top: var(--spacing-sm);
    background: linear-gradient(135deg, var(--accent-color) 0%, #0d9488 100%);
}

.generate-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.output-header h3 {
    font-size: 1.25rem;
    color: var(--primary-light);
}

.output-stats {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.output-content {
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    min-height: 300px;
    max-height: 500px;
    overflow-y: auto;
    line-height: 1.8;
}

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

.output-content.loading {
    display: flex;
    align-items: center;
    justify-content: center;
}

.output-content .error {
    color: var(--error-color);
    padding: var(--spacing-sm);
    background: rgba(239, 68, 68, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Parameters Section */
.parameters-section {
    padding: var(--spacing-xl) 0;
}

.parameters-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.parameter-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
}

.parameter-card:hover {
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-lg);
}

.parameter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.parameter-header h3 {
    font-size: 1.25rem;
    color: var(--primary-light);
}

.param-value {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 1.1rem;
    min-width: 80px;
    text-align: center;
}

.param-slider {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-darker);
    border-radius: 4px;
    outline: none;
    margin: var(--spacing-sm) 0;
}

.param-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.param-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

.param-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.param-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

.param-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.stop-input {
    width: 100%;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
}

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

.parameter-info {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.parameter-info p {
    margin-bottom: var(--spacing-sm);
}

.parameter-info ul,
.parameter-info ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.parameter-info li {
    margin-bottom: 0.25rem;
}

.parameter-info .tip {
    background: rgba(20, 184, 166, 0.1);
    border-left: 3px solid var(--accent-color);
    padding: var(--spacing-sm);
    border-radius: 4px;
    color: var(--accent-color);
    font-weight: 500;
}

.parameter-info .warning {
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--warning-color);
    padding: var(--spacing-sm);
    border-radius: 4px;
    color: var(--warning-color);
    font-weight: 500;
}

/* Cheat Sheet Section */
.cheatsheet-section {
    padding: var(--spacing-xl) 0;
    background: rgba(99, 102, 241, 0.05);
}

.cheatsheet-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.cheatsheet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.cheat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.cheat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.cheat-card h3 {
    color: var(--primary-light);
    font-size: 1.15rem;
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: var(--spacing-xs);
}

.cheat-card ul,
.cheat-card ol {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.cheat-card li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.cheat-card strong {
    color: var(--text-primary);
}

/* Footer */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.footer-note {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .header-text h1 {
        font-size: 1.5rem;
    }
    
    .logo {
        height: 50px;
    }
    
    .playground-grid {
        grid-template-columns: 1fr;
    }
    
    .preset-buttons {
        justify-content: center;
    }
    
    .intro-card h2 {
        font-size: 1.5rem;
    }
    
    .parameters-section h2,
    .playground-section h2,
    .cheatsheet-section h2 {
        font-size: 1.5rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.parameter-card,
.intro-card,
.playground-input,
.playground-output,
.cheat-card {
    animation: fadeIn 0.5s ease-out;
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}