/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color palette */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --secondary-dark: #059669;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    
    /* Neutral colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --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 -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-6);
    min-height: 100vh;
}

/* Header styles */
.header {
    text-align: center;
    margin-bottom: var(--spacing-12);
    padding: var(--spacing-8) 0;
}

.header-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.logo i {
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-800);
    margin: 0;
}

.subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    font-weight: 400;
}

/* Main content */
.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
}

@media (min-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr 1fr;
    }
}

/* Form sections */
.form-section {
    position: relative;
}

.form-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    height: fit-content;
}

.form-container:hover {
    transform: translateY(-2px);
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

.form-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.form-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-4);
    box-shadow: var(--shadow-lg);
}

.form-icon i {
    font-size: var(--font-size-2xl);
    color: white;
}

.form-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-2);
}

.form-header p {
    color: var(--gray-600);
    font-size: var(--font-size-base);
}

/* Form styles */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.input-group label {
    font-weight: 500;
    color: var(--gray-700);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group input,
.input-group textarea {
    padding: var(--spacing-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all 0.2s ease;
    background: white;
}

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

.input-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    line-height: 1.5;
}

.input-help {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xs);
    color: var(--gray-500);
}

.input-help i {
    color: var(--primary-color);
}

.disabled-input {
    background-color: var(--gray-100) !important;
    color: var(--gray-500) !important;
    cursor: not-allowed !important;
}

/* Parameters grid */
.parameters-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
}

.parameter-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.parameter-item label {
    font-weight: 500;
    color: var(--gray-700);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.parameter-item small {
    font-size: var(--font-size-xs);
    color: var(--gray-400);
    font-style: italic;
}

/* Output groups */
.output-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.output-group input,
.output-group textarea {
    background-color: var(--gray-50);
    border-color: var(--gray-300);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: var(--font-size-sm);
}

/* Button styles */
.form-actions {
    display: flex;
    justify-content: center;
    margin: var(--spacing-4) 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-6);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Status message */
.status-message {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    z-index: 1000;
    max-width: 400px;
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    transform: translateX(100%);
}

.status-message:not(.hidden) {
    transform: translateX(0);
}

.status-message.success {
    background: rgba(16, 185, 129, 0.9);
    color: white;
}

.status-message.error {
    background: rgba(239, 68, 68, 0.9);
    color: white;
}

.status-message.warning {
    background: rgba(245, 158, 11, 0.9);
    color: white;
}

.status-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.status-icon {
    font-size: var(--font-size-lg);
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: opacity 0.3s ease;
}

.loading-content {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-4);
}

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

/* Utility classes */
.hidden {
    display: none !important;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-4);
    }
    
    .header-content {
        padding: var(--spacing-6);
    }
    
    .logo {
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .logo h1 {
        font-size: var(--font-size-2xl);
    }
    
    .form-container {
        padding: var(--spacing-6);
    }
    
    .parameters-grid {
        grid-template-columns: 1fr;
    }
    
    .status-message {
        top: var(--spacing-4);
        right: var(--spacing-4);
        left: var(--spacing-4);
        max-width: none;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-container {
    animation: fadeInUp 0.6s ease-out;
}

.form-container:nth-child(2) {
    animation-delay: 0.2s;
}

/* Focus styles for accessibility */
.btn:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --gray-50: #1f2937;
        --gray-100: #374151;
        --gray-200: #4b5563;
        --gray-300: #6b7280;
        --gray-800: #f9fafb;
        --gray-900: #ffffff;
    }
}