:root {
    /* Base font size - Change this one value to scale all fonts across the entire app */
    --base-font-size: 1rem;

    /* Relative font sizes based on the base */
    --font-xs: calc(var(--base-font-size) * 0.75);      /* Extra small */
    --font-sm: calc(var(--base-font-size) * 0.875);     /* Small */
    --font-base: var(--base-font-size);                 /* Base/Body */
    --font-md: calc(var(--base-font-size) * 1.125);     /* Medium */
    --font-lg: calc(var(--base-font-size) * 1.25);      /* Large */
    --font-xl: calc(var(--base-font-size) * 1.5);       /* Extra large */
    --font-2xl: calc(var(--base-font-size) * 1.875);    /* 2X large */
    --font-3xl: calc(var(--base-font-size) * 2.25);     /* 3X large */
    --font-4xl: calc(var(--base-font-size) * 3);        /* 4X large */

    /* Modern Color Palette - Professional & Vibrant */
    --primary-50: #f0f4ff;
    --primary-100: #e0e9ff;
    --primary-200: #c7d7fe;
    --primary-300: #a5b8fc;
    --primary-400: #8594f8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;

    --secondary-50: #fdf4ff;
    --secondary-100: #fae8ff;
    --secondary-200: #f5d0fe;
    --secondary-300: #f0abfc;
    --secondary-400: #e879f9;
    --secondary-500: #d946ef;
    --secondary-600: #c026d3;
    --secondary-700: #a21caf;
    --secondary-800: #86198f;
    --secondary-900: #701a75;

    --accent-50: #fef3c7;
    --accent-100: #fde68a;
    --accent-200: #fcd34d;
    --accent-300: #fbbf24;
    --accent-400: #f59e0b;
    --accent-500: #f97316;
    --accent-600: #ea580c;
    --accent-700: #c2410c;
    --accent-800: #9a3412;
    --accent-900: #7c2d12;

    --success-50: #f0fdf4;
    --success-100: #dcfce7;
    --success-500: #22c55e;
    --success-600: #16a34a;
    --success-700: #15803d;

    --danger-50: #fef2f2;
    --danger-100: #fee2e2;
    --danger-500: #ef4444;
    --danger-600: #dc2626;
    --danger-700: #b91c1c;

    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-500: #f59e0b;
    --warning-600: #d97706;

    --info-50: #eff6ff;
    --info-100: #dbeafe;
    --info-500: #3b82f6;
    --info-600: #2563eb;

    /* Neutral Colors - Modern Gray Scale */
    --gray-50: #fafbfc;
    --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;

    /* Semantic Colors */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    --border-primary: var(--gray-200);
    --border-secondary: var(--gray-300);

    /* Gradient Backgrounds */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-success: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-warm: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --gradient-cool: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
    --gradient-sunset: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
    --gradient-ocean: linear-gradient(135deg, #2193b0 0%, #6dd5ed 100%);
    --gradient-royal: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 8px 0 rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px 0 rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 24px 0 rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 20px 40px 0 rgba(0, 0, 0, 0.18);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--font-base);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

* {
    box-sizing: border-box;
}

h1:focus {
    outline: none;
}

/* Modern Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-sm);
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    color: #fff;
    background: var(--gradient-royal);
    border: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--border-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    color: #fff;
    background: var(--gradient-success);
    border: none;
    box-shadow: var(--shadow-sm);
}

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

.btn-outline-secondary {
    color: var(--text-secondary);
    background-color: transparent;
    border: 1.5px solid var(--border-secondary);
}

.btn-outline-secondary:hover {
    color: var(--text-primary);
    background: var(--gray-100);
    border-color: var(--gray-400);
}

.btn:focus, .btn:active:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

/* Modern Form Controls */
.form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-sm);
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-xs);
}

.form-control:focus {
    color: var(--text-primary);
    background: var(--bg-primary);
    border-color: var(--primary-500);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1), var(--shadow-sm);
}

.form-control.is-invalid {
    border-color: var(--danger-500);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-control.is-valid {
    border-color: var(--success-500);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

/* Textarea specific */
textarea.form-control {
    min-height: 200px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: var(--font-sm);
    line-height: 1.6;
    resize: vertical;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: var(--font-sm);
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

/* Modern Card Styles */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.card-header {
    padding: 1.5rem;
    background: var(--gradient-royal);
    color: white;
    border-bottom: none;
    font-weight: 600;
}

.card-body {
    padding: 2rem;
}

.card-title {
    margin-bottom: 1rem;
    font-size: var(--font-lg);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* Modern Alert Styles */
.alert {
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    border: 1.5px solid transparent;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--font-sm);
    box-shadow: var(--shadow-sm);
}

.alert-success {
    color: var(--success-700);
    background: var(--success-50);
    border-color: var(--success-600);
}

.alert-danger {
    color: var(--danger-700);
    background: var(--danger-50);
    border-color: var(--danger-600);
}

.alert-warning {
    color: var(--warning-600);
    background: var(--warning-50);
    border-color: var(--warning-600);
}

.alert-info {
    color: var(--info-600);
    background: var(--info-50);
    border-color: var(--info-600);
}

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }

.d-flex { display: flex; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }

.w-100 { width: 100%; }

/* Code formatting */
.code-output {
    background: var(--gray-50);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-lg);
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: var(--font-sm);
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 400px;
    overflow-y: auto;
    box-shadow: var(--shadow-xs);
}

/* Validation styles */
.valid.modified:not([type=checkbox]) {
    outline: 1px solid #28a745;
}

.invalid {
    outline: 1px solid #dc3545;
    border-color: #dc3545;
}

.validation-message {
    color: #dc3545;
    font-size: var(--font-sm);
    margin-top: 0.25rem;
}

/* Error UI - keep existing styles */
#blazor-error-ui {
    background: #ffebee;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    color: #c62828;
    border-top: 3px solid #f44336;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
    font-weight: bold;
}

.blazor-error-boundary {
    background: #ffebee;
    padding: 1rem 1rem 1rem 3.7rem;
    color: #c62828;
    border-radius: 6px;
    border-left: 4px solid #f44336;
}

.blazor-error-boundary::after {
    content: "An error has occurred.";
}

/* Loading styles - keep existing */
.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 20vh auto 1rem auto;
}

.loading-progress circle {
    fill: none;
    stroke: #e0e0e0;
    stroke-width: 0.6rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: #667eea;
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
    color: #667eea;
}

.loading-progress-text:after {
    content: var(--blazor-load-percentage-text, "Loading");
}

code {
    color: #e83e8c;
    background-color: #f8f9fa;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: var(--font-sm);
}

/* LocalStorage Persisted Data Indicator */
.persisted-data {
    background-color: #f0f4ff !important;
    border-left: 3px solid #6366f1 !important;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

[data-theme="dark"] .persisted-data {
    background-color: #1a1f3a !important;
    border-left: 3px solid #8594f8 !important;
}

/* Responsive design */
@media (max-width: 768px) {
    .card-body {
        padding: 1rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: var(--font-sm);
    }

    textarea.form-control {
        min-height: 150px;
        font-size: var(--font-xs);
    }
}