/* ================================
   SEAC OIDC Playground - Styles
   ================================ */

:root {
    /* Colors - Light White + Blue Theme */
    --color-bg-primary: #f8fafc;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-card: rgba(255, 255, 255, 0.9);
    --color-bg-glass: rgba(255, 255, 255, 0.85);

    --color-border: rgba(148, 163, 184, 0.3);
    --color-border-focus: rgba(59, 130, 246, 0.5);

    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: rgba(59, 130, 246, 0.1);

    --color-success: #10b981;
    --color-success-light: rgba(16, 185, 129, 0.1);

    --color-warning: #f59e0b;
    --color-warning-light: rgba(245, 158, 11, 0.1);

    --color-error: #ef4444;
    --color-error-light: rgba(239, 68, 68, 0.1);

    --color-info: #0284c7;
    --color-info-light: rgba(2, 132, 199, 0.08);

    --color-text-primary: #1e293b;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.25);

    /* Layout */
    --header-height: 64px;
    --sidebar-width: 280px;
    --preview-width: 320px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ================================
   Base Styles
   ================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;

    /* Background gradient - Light Blue */
    background-image:
        radial-gradient(ellipse at 0% 0%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 100% 100%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(99, 102, 241, 0.04) 0%, transparent 70%);
}

/* ================================
   Header
   ================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 100;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    width: 40px;
    height: 40px;
    color: var(--color-primary);
}

.brand-text h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.brand-text .subtitle {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

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

/* ================================
   Main Layout
   ================================ */

.main-container {
    display: flex;
    padding-top: var(--header-height);
    min-height: 100vh;
}

/* ================================
   Sidebar
   ================================ */

.sidebar {
    position: fixed;
    left: 0;
    top: var(--header-height);
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--color-border);
    box-shadow: 1px 0 3px rgba(0, 0, 0, 0.03);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.steps-nav {
    flex: 1;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.step-item::after {
    content: '';
    position: absolute;
    left: 27px;
    top: 52px;
    width: 2px;
    height: calc(100% - 20px);
    background: var(--color-border);
}

.step-item:last-child::after {
    display: none;
}

.step-item:hover {
    background: var(--color-primary-light);
}

.step-item.active {
    background: var(--color-primary-light);
}

.step-item.active .step-number {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.step-item.completed .step-number {
    background: var(--color-success);
    color: white;
}

.step-item.completed::after {
    background: var(--color-success);
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
    transition: all var(--transition-normal);
}

.step-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.step-title {
    font-weight: 500;
    color: var(--color-text-primary);
}

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

.sidebar-footer {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-lg);
}

/* ================================
   Content Area
   ================================ */

.content-area {
    flex: 1;
    margin-left: var(--sidebar-width);
    margin-right: var(--preview-width);
    padding: var(--spacing-xl);
    max-width: calc(100vw - var(--sidebar-width) - var(--preview-width));
}

.step-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.step-panel.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.panel-header {
    margin-bottom: var(--spacing-xl);
}

.panel-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xs);
}

.panel-header p {
    color: var(--color-text-secondary);
}

.panel-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.panel-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

/* ================================
   Form Styles
   ================================ */

.form-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.form-section h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

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

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group .required {
    color: var(--color-error);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    width: 100%;
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

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

.input-with-action {
    display: flex;
    gap: var(--spacing-sm);
}

.input-with-action input {
    flex: 1;
}

.form-group .btn-icon {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
}

.form-group {
    position: relative;
}

.form-group input[type="password"]+.btn-icon {
    top: calc(50% + 10px);
}

/* Checkbox Group */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.checkbox-label:hover {
    border-color: var(--color-primary);
}

.checkbox-label input {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.checkbox-label input:checked+.checkmark+span {
    color: var(--color-primary);
}

.tag {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: var(--color-bg-tertiary);
    color: var(--color-text-muted);
}

.tag-required {
    background: var(--color-error-light);
    color: var(--color-error);
}

.tag-info {
    background: var(--color-info-light);
    color: var(--color-info);
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

/* ================================
   URL Display
   ================================ */

.url-display {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.url-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.method-badge {
    background: var(--color-success);
    color: white;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

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

.endpoint {
    font-family: var(--font-mono);
    color: var(--color-text-secondary);
}

.url-content {
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.url-content code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    word-break: break-all;
    color: var(--color-info);
}

.url-actions {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border-top: 1px solid var(--color-border);
}

/* ================================
   Params Table
   ================================ */

.params-breakdown {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.params-breakdown h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.params-table {
    width: 100%;
    border-collapse: collapse;
}

.params-table th,
.params-table td {
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

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

.params-table td:first-child {
    color: var(--color-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.params-table td:last-child {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    word-break: break-all;
}

/* ================================
   Info Card
   ================================ */

.info-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-info-light);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: var(--radius-lg);
}

.info-icon {
    color: var(--color-info);
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.info-content p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* ================================
   Request Preview
   ================================ */

.request-preview {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.preview-actions {
    margin-left: auto;
}

.code-block {
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
}

/* ================================
   Response Section
   ================================ */

.response-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.response-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.response-header h3 {
    font-size: 0.875rem;
    font-weight: 500;
}

.status-badge {
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

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

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

/* ================================
   Token Cards
   ================================ */

.token-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.token-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.token-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.token-type {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}

.token-value {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    word-break: break-all;
    max-height: 80px;
    overflow-y: auto;
}

/* ================================
   User Profile
   ================================ */

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.profile-avatar {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    overflow: hidden;
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-info h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.profile-info p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

/* ================================
   Success Card
   ================================ */

.success-card {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-success-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-lg);
}

.success-icon {
    color: var(--color-success);
    margin-bottom: var(--spacing-md);
}

.success-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.success-card p {
    color: var(--color-text-secondary);
}

/* ================================
   State Validation
   ================================ */

.state-validation {
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

.state-validation.valid {
    color: var(--color-success);
}

.state-validation.invalid {
    color: var(--color-error);
}

/* ================================
   Preview Panel
   ================================ */

.preview-panel {
    position: fixed;
    right: 0;
    top: var(--header-height);
    bottom: 0;
    width: var(--preview-width);
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--color-border);
    box-shadow: -1px 0 3px rgba(0, 0, 0, 0.03);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border);
}

.preview-tab {
    flex: 1;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 2px solid transparent;
}

.preview-tab:hover {
    color: var(--color-text-primary);
}

.preview-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.preview-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

/* JWT Decoder */
.jwt-decoder {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.jwt-input-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.jwt-input-section label {
    font-size: 0.85rem;
    font-weight: 500;
}

.jwt-input-section textarea {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    resize: vertical;
    min-height: 100px;
}

.jwt-input-section textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.jwt-result {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.jwt-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.jwt-section h4 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-muted);
}

.jwt-section pre {
    padding: var(--spacing-md);
    margin: 0;
    overflow-x: auto;
}

.jwt-section code {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    white-space: pre-wrap;
}

/* Flow Diagram */
.flow-diagram {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.flow-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    padding: var(--spacing-md) 0;
}

.flow-icon {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
    z-index: 1;
}

.flow-line {
    position: absolute;
    left: 13px;
    top: 42px;
    width: 2px;
    height: calc(100% - 14px);
    background: var(--color-border);
}

.flow-step:last-child .flow-line {
    display: none;
}

.flow-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* ================================
   Buttons
   ================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-glow);
}

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

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--color-text-primary);
    background: var(--color-primary-light);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.75rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ================================
   Toast
   ================================ */

.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-message {
    font-size: 0.875rem;
}

/* ================================
   Modal
   ================================ */

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

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

.modal-header h3 {
    font-size: 1.1rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ================================
   Responsive
   ================================ */

@media (max-width: 1200px) {
    :root {
        --preview-width: 280px;
    }
}

@media (max-width: 1024px) {
    .preview-panel {
        display: none;
    }

    .content-area {
        margin-right: 0;
        max-width: calc(100vw - var(--sidebar-width));
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 240px;
    }

    .header-brand .subtitle {
        display: none;
    }

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