/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    /* Accent Colors */
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: #dbeafe;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --border-hover: #475569;
    --accent-light: #1e3a8a;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* ===== NAVIGATION ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.brand-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-search {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: var(--space-md);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.search-input {
    width: 300px;
    padding: var(--space-sm) var(--space-md) var(--space-sm) 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
}

.nav-btn.primary {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.nav-btn.primary:hover {
    background-color: var(--accent-hover);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: var(--space-2xl) 0;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.quick-tools {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    max-width: 800px;
    margin: 0 auto;
}

/* ===== TOOL CARDS ===== */
.tool-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), #8b5cf6);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.quick-tool {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-align: left;
}

.tool-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--accent-primary), #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.tool-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.tool-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== SEO CONTENT SECTION ===== */
.seo-content {
    padding: var(--space-2xl) 0;
    background-color: var(--bg-primary);
}

.seo-content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.seo-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
    text-align: center;
}

.seo-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: var(--space-xl) 0 var(--space-md) 0;
    color: var(--text-primary);
}

.seo-content p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.seo-benefits {
    list-style: none;
    padding: 0;
    margin: var(--space-lg) 0;
}

.seo-benefits li {
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    position: relative;
    padding-left: var(--space-lg);
}

.seo-benefits li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.seo-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ===== CATEGORIES ===== */
.categories {
    padding: var(--space-2xl) 0;
    background-color: var(--bg-secondary);
}

.categories-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.categories-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.categories-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.category-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.category-btn:hover,
.category-btn.active {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.category-btn i {
    font-size: 1rem;
}

/* ===== SECTIONS ===== */
.featured,
.tools-collection {
    padding: var(--space-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ===== TOOLS GRID ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.resource-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

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

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), #8b5cf6, #06b6d4);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.resource-card:hover::before {
    opacity: 1;
}

.resource-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.resource-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent-primary), #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    font-weight: 600;
    flex-shrink: 0;
}

.resource-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.resource-info .resource-category {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.resource-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.resource-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.resource-tag {
    padding: var(--space-xs) var(--space-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.resource-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
}

.resource-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.resource-link:hover {
    color: var(--accent-hover);
}

.resource-stats {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-outline:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
}

.load-more {
    text-align: center;
}

/* ===== MODAL ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

[data-theme="dark"] .modal-backdrop {
    background-color: rgba(0, 0, 0, 0.85);
}

.modal-content {
    position: relative;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

[data-theme="dark"] .modal-content {
    border: 1px solid var(--border-hover);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.modal-close:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-lg);
    overflow-y: auto;
    flex: 1;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-section h3,
.footer-section h4 {
    font-weight: 600;
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--accent-primary);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
}

.social-link:hover {
    background-color: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.footer-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .nav-container {
        padding: var(--space-md);
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .search-input {
        width: 200px;
    }
    
    .hero {
        padding: var(--space-xl) 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .quick-tools {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .categories-header h2 {
        font-size: 2rem;
    }
    
    .category-filters {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: var(--space-sm);
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .modal-content {
        margin: var(--space-md);
        max-height: calc(100vh - 2rem);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--space-sm) var(--space-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .categories-header h2 {
        font-size: 1.75rem;
    }
    
    .tool-card {
        padding: var(--space-md);
    }
    
    .resource-card {
        padding: var(--space-md);
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

/* ===== TOOL INTERFACE STYLES ===== */
.tool-interface {
    max-width: 100%;
}

.input-group {
    margin-bottom: var(--space-lg);
}

.input-group label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: var(--font-mono);
    transition: all 0.2s ease;
    resize: vertical;
}

.input-group textarea[readonly] {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: default;
}

[data-theme="dark"] .input-group textarea[readonly] {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

/* Base64 and URL Encoder specific output styling */
#base64-output,
#url-output {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    border: 1px solid var(--border-color);
    min-height: 120px;
}

[data-theme="dark"] #base64-output,
[data-theme="dark"] #url-output {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.input-group input:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
    background-color: var(--bg-primary);
}

.input-group textarea {
    min-height: 120px;
    line-height: 1.5;
}

.button-group {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.output-group {
    position: relative;
    margin-bottom: var(--space-lg);
}

.output-group .copy-btn {
    position: absolute;
    top: 2rem;
    right: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    z-index: 10;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
}

.output-group .copy-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
}

/* ===== JWT TOOL STYLES ===== */
.jwt-results {
    margin-top: var(--space-lg);
}

.result-section {
    margin-bottom: var(--space-lg);
}

.result-section h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--border-color);
}

.result-output {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.4;
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 80px;
    max-height: 300px;
    overflow-y: auto;
}

.signature-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== OIDC TOOL STYLES ===== */
.oidc-config {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.oidc-results {
    margin-top: var(--space-lg);
}

.auth-url-container {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.auth-url-input {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    word-break: break-all;
}

/* ===== NOTIFICATION STYLES ===== */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    animation: slideInNotification 0.3s ease;
    box-shadow: var(--shadow-lg);
}

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

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

.notification-info { 
    background-color: var(--accent-primary); 
}

@keyframes slideInNotification {
    from { 
        transform: translateX(100%); 
        opacity: 0; 
    }
    to { 
        transform: translateX(0); 
        opacity: 1; 
    }
}

/* ===== TOOL INTERFACE RESPONSIVE ===== */
@media (max-width: 768px) {
    .button-group {
        flex-direction: column;
    }
    
    .oidc-config {
        grid-template-columns: 1fr;
    }
    
    .auth-url-container {
        flex-direction: column;
    }
    
    .output-group .copy-btn {
        position: static;
        margin-top: var(--space-sm);
        width: 100%;
    }
    
    .tool-interface {
        padding: 0;
    }
    
    .result-output {
        font-size: 0.75rem;
        max-height: 200px;
    }
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.visible { display: block; }