/*
============================================================================
Copyright (c) 2024 HJJB, LLC
All Rights Reserved

This software is the proprietary information of HJJB, LLC.
Unauthorized use, reproduction, or distribution is strictly prohibited.

For licensing inquiries, please contact:
Email: licensing@thecoatlessprofessor.com
============================================================================
*/

:root {
    /* Modern primary palette */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #60a5fa;

    /* Modern secondary palette */
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --secondary-light: #94a3b8;

    /* Semantic colors - vibrant but accessible */
    --success-color: #10b981;
    --success-hover: #059669;
    --success-light: #d1fae5;

    --error-color: #ef4444;
    --error-hover: #dc2626;
    --error-light: #fee2e2;

    --warning-color: #f59e0b;
    --warning-hover: #d97706;
    --warning-light: #fef3c7;

    --info-color: #06b6d4;
    --info-light: #cffafe;

    /* Neutrals - refined grayscale */
    --background: #f8fafc;
    --container-bg: #ffffff;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --light-gray: #f1f5f9;
    --medium-gray: #cbd5e1;

    /* Modern shadows */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --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);

    /* Modern border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Smooth transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background: var(--background);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    background: var(--container-bg);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    background: linear-gradient(to bottom, var(--light-gray), transparent);
    margin: -2rem -2rem 2rem -2rem;
    padding: 2rem 2rem 1.5rem 2rem;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

header h1 {
    margin: 0 0 0.75rem 0;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: -0.025em;
    font-size: 2rem;
}

header p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.75;
}

.section {
    margin-bottom: 25px;
}

.section h2 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 1.3em;
}

.section h3 {
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--text-color);
    font-size: 1.1em;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.form-row > * {
    flex: 1;
    min-width: 200px;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-family: inherit;
    background-color: var(--container-bg);
    color: var(--text-color);
    transition: var(--transition-fast);
    box-shadow: var(--shadow-xs);
}

input[type="text"]:hover,
input[type="number"]:hover,
input[type="email"]:hover,
input[type="date"]:hover,
select:hover,
textarea:hover {
    border-color: var(--medium-gray);
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="date"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    min-height: 150px;
    font-family: 'Courier New', monospace;
    resize: vertical;
    line-height: 1.6;
}

input[type="checkbox"],
input[type="radio"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
    margin-right: 8px;
}

.checkbox-group,
.radio-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.checkbox-group label,
.radio-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.button-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.primary-button,
.secondary-button,
.success-button,
.download-button {
    padding: 0.75rem 1.75rem;
    font-size: 0.9375rem;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    letter-spacing: 0.025em;
}

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

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

.primary-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.primary-button:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.5;
    transform: none;
    box-shadow: var(--shadow-xs);
}

.secondary-button {
    background-color: var(--secondary-color);
    color: white;
}

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

.secondary-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.success-button {
    background-color: var(--success-color);
    color: white;
}

.success-button:hover {
    background-color: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.success-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.download-button {
    background-color: var(--success-color);
    color: white;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

.download-button:hover {
    background-color: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.download-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.copy-button {
    padding: 0.5rem 1rem;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-xs);
}

.copy-button:hover {
    background-color: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.copy-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
}

pre {
    background-color: var(--light-gray);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    box-shadow: var(--shadow-xs);
}

code {
    background-color: var(--light-gray);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    font-weight: 500;
    color: var(--text-color);
}

.error,
.error-message {
    background-color: var(--error-light);
    border: 1.5px solid var(--error-color);
    border-left: 4px solid var(--error-color);
    color: #991b1b;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-top: 1rem;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}

.warning {
    background-color: var(--warning-light);
    border: 1.5px solid var(--warning-color);
    border-left: 4px solid var(--warning-color);
    color: #92400e;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-top: 1rem;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}

.success {
    background-color: var(--success-light);
    border: 1.5px solid var(--success-color);
    border-left: 4px solid var(--success-color);
    color: #065f46;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-top: 1rem;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}

.info {
    background-color: var(--info-light);
    border: 1.5px solid var(--info-color);
    border-left: 4px solid var(--info-color);
    color: #164e63;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-top: 1rem;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 1.25rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

table th,
table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background: linear-gradient(to bottom, var(--light-gray), #e8eef5);
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

table tr:hover {
    background-color: var(--light-gray);
    transition: var(--transition-fast);
}

table tr:last-child td {
    border-bottom: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.stat-card {
    background: linear-gradient(135deg, var(--light-gray) 0%, #ffffff 100%);
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
}

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

.stat-card h4 {
    margin: 0 0 0.5rem 0;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.stat-card .value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.025em;
}

canvas {
    max-width: 100%;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: white;
    box-shadow: var(--shadow-xs);
}

.help-section {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

details {
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    background: var(--container-bg);
    box-shadow: var(--shadow-xs);
    transition: var(--transition-base);
}

details[open] {
    box-shadow: var(--shadow-sm);
}

summary {
    cursor: pointer;
    font-weight: 600;
    padding: 0.5rem;
    user-select: none;
    color: var(--text-color);
    transition: var(--transition-fast);
    border-radius: var(--radius-md);
}

summary:hover {
    color: var(--primary-color);
    background: var(--light-gray);
}

details pre {
    margin: 10px 0;
}

details ul {
    margin: 10px 0;
    padding-left: 20px;
}

details li {
    margin-bottom: 5px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.card h3 {
    margin-top: 0;
    color: var(--text-color);
    font-weight: 600;
}

.badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: 9999px;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.025em;
    box-shadow: var(--shadow-xs);
}

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

.badge-success {
    background-color: var(--success-color);
    color: white;
}

.badge-error {
    background-color: var(--error-color);
    color: white;
}

.badge-warning {
    background-color: var(--warning-color);
    color: white;
}

.visualization-container {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.slider-container {
    margin: 15px 0;
}

.slider-container label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.slider-container input[type="range"] {
    width: 100%;
}

.slider-value {
    display: inline-block;
    min-width: 60px;
    text-align: right;
    font-weight: bold;
    color: var(--primary-color);
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 20px;
    }

    .form-row {
        flex-direction: column;
    }

    .button-group {
        flex-direction: column;
    }

    .primary-button,
    .secondary-button,
    .success-button {
        width: 100%;
    }

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