:root {
    /* Color System */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-secondary: #64748b;
    --color-success: #059669;
    --color-success-light: #d1fae5;
    --color-error: #dc2626;
    --color-error-light: #fecaca;
    --color-warning: #d97706;
    --color-warning-light: #fed7aa;

    /* Neutral Colors */
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

    /* Spacing System */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    box-sizing: border-box;
}

.hidden {
    display: none !important;
}

body {
    font-family: var(--font-family-base);
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
    color: var(--color-gray-800);
    margin: 0;
    padding: var(--space-8);
    line-height: 1.6;
    font-size: 16px;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    background: #ffffff;
    padding: var(--space-12);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-200);
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-success) 100%);
}

h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin: 0 0 var(--space-6) 0;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

p {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin: 0 0 var(--space-8) 0;
    line-height: 1.7;
}

textarea {
    width: 100%;
    padding: var(--space-4);
    font-size: 1rem;
    font-family: var(--font-family-mono);
    resize: vertical;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: var(--color-gray-50);
    color: var(--color-gray-800);
    transition: all 0.2s ease;
    min-height: 120px;
    line-height: 1.5;
}

textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea::placeholder {
    color: var(--color-gray-400);
    font-style: italic;
}

button {
    margin-top: var(--space-4);
    margin-right: var(--space-3);
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-family-base);
    background: var(--color-primary);
    color: white;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.025em;
}

button:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

#refresh {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

#refresh:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-hover);
    color: var(--color-primary-hover);
    transform: translateY(-1px);
}

#loader {
    margin-top: var(--space-6);
    padding: var(--space-4);
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

#loader::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    border-top: 3px solid transparent;
    animation: spin 1s linear infinite;
}

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

progress {
    width: 100%;
    height: 8px;
    margin-top: var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-gray-200);
    -webkit-appearance: none;
    appearance: none;
}

progress::-webkit-progress-bar {
    background: var(--color-gray-200);
    border-radius: var(--radius-md);
}

progress::-webkit-progress-value {
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-success) 100%);
    border-radius: var(--radius-md);
    transition: width 0.3s ease;
}

progress::-moz-progress-bar {
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-success) 100%);
    border-radius: var(--radius-md);
}

.alert {
    margin-top: var(--space-6);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-lg);
    font-weight: 600;
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.alert.hidden {
    display: none;
}

.alert.error {
    background: var(--color-error-light);
    color: var(--color-error);
    border-left-color: var(--color-error);
}

.alert.success {
    background: var(--color-success-light);
    color: var(--color-success);
    border-left-color: var(--color-success);
}

.alert.warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
    border-left-color: var(--color-warning);
}

#results {
    margin-top: var(--space-6);
    padding: var(--space-6);
    background: var(--color-gray-900);
    color: var(--color-gray-100);
    border-radius: var(--radius-lg);
    font-family: var(--font-family-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    border: 1px solid var(--color-gray-700);
    box-shadow: var(--shadow-lg);
    position: relative;
}

#results::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-success) 100%);
}

.result-card {
    background: #ffffff;
    padding: var(--space-6);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-lg);
    margin-top: var(--space-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
    transition: all 0.2s ease;
}

.result-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.result-card h3 {
    margin: 0 0 var(--space-5) 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.025em;
}

.result-section {
    margin-top: var(--space-5);
}

.result-section strong {
    display: block;
    margin-bottom: var(--space-3);
    color: var(--color-gray-700);
    font-weight: 600;
    font-size: 1.1rem;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
    font-size: 0.95rem;
}

.result-grid div {
    background: var(--color-gray-50);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-200);
    transition: all 0.2s ease;
}

.result-grid div:hover {
    background: #ffffff;
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-sm);
}

.result-card .error-message {
    color: var(--color-error);
    font-weight: 600;
    background: var(--color-error-light);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-error);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: var(--space-4);
    }

    .container {
        padding: var(--space-8);
    }

    h1 {
        font-size: 1.875rem;
    }

    p {
        font-size: 1rem;
    }

    button {
        width: 100%;
        margin-right: 0;
        margin-bottom: var(--space-2);
    }

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

@media (max-width: 480px) {
    .container {
        padding: var(--space-6);
    }

    h1 {
        font-size: 1.5rem;
    }

    textarea {
        min-height: 100px;
    }
}

/* Enhanced Focus States for Accessibility */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus,
textarea:focus {
    outline: none;
}

/* Custom Scrollbar for Results */
#results::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

#results::-webkit-scrollbar-track {
    background: var(--color-gray-800);
    border-radius: var(--radius-sm);
}

#results::-webkit-scrollbar-thumb {
    background: var(--color-gray-600);
    border-radius: var(--radius-sm);
}

#results::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

/* Navigation Links */
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.nav-link:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-hover);
    transform: translateY(-1px);
}

/* Loading Animation Enhancement */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

#loader[hidden] {
    display: none;
}

#loader:not([hidden]) {
    animation: pulse 2s ease-in-out infinite;
}

/* Button Loading State */
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

button:disabled:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    box-shadow: none;
    transform: none;
}

/* Enhanced Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

/* Improved Form Elements */
textarea {
    font-weight: 400;
    letter-spacing: 0.01em;
}

textarea:hover {
    border-color: var(--color-gray-300);
}

/* Enhanced Alert Styling */
.alert {
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid;
}

.alert.error {
    border-color: var(--color-error);
}

.alert.success {
    border-color: var(--color-success);
}

.alert.warning {
    border-color: var(--color-warning);
}

/* Professional Progress Bar Enhancement */
progress {
    height: 6px;
    border-radius: var(--radius-md);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Result Card Enhancements */
.result-card {
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--color-primary), var(--color-success));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--radius-lg);
}

.result-card:hover::before {
    opacity: 0.1;
}

/* Enhanced Code Block Styling */
#results {
    position: relative;
    background: linear-gradient(135deg, var(--color-gray-900) 0%, #1a202c 100%);
    box-shadow: var(--shadow-xl);
}

#results::after {
    content: 'Terminal Output';
    position: absolute;
    top: var(--space-3);
    right: var(--space-4);
    font-size: 0.75rem;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}