/* DNSLens - Main Stylesheet */

/* CSS Variables */
:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #eff6ff;
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-error: #ef4444;
    --color-error-light: #fee2e2;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 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);
    --radius: 8px;
    --radius-lg: 12px;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
    --color-bg: #1e3167;
    --color-bg-secondary: #283d73;
    --color-bg-tertiary: #344a82;
    --color-text: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3c7;
    --color-border: #3d5291;
    --color-border-light: #283d73;
    --color-primary: #60a5fa;
    --color-primary-hover: #3b82f6;
    --color-primary-light: #2a4578;
    --color-success-light: #1a4d5e;
    --color-warning-light: #5c4a2f;
    --color-error-light: #5c2f3d;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.site-header {
    background: var(--color-bg);
    padding: 0.75rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: 1.25rem;
}

.logo-image {
    height: 40px;
    width: auto;
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.5rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: block;
}

/* Main Content */
.main-content {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Hero Section */
.hero-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: 2rem 0;
}

.hero-content {
    max-width: 700px;
    width: 100%;
}

/* Hero Logo - Theme Aware */
.hero-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.hero-logo img {
    height: 120px;
    width: auto;
}

/* Light theme: show dark logo, hide light logo */
.hero-logo-light {
    display: block;
}

.hero-logo-dark {
    display: none;
}

/* Dark theme: show light logo, hide dark logo */
[data-theme="dark"] .hero-logo-light {
    display: none;
}

[data-theme="dark"] .hero-logo-dark {
    display: block;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 2.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin: 0 0 2rem;
}

/* Search Form */
.search-form {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.search-container {
    display: flex;
    gap: 0.5rem;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 0.5rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-container:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.75rem 1rem;
    font-size: 1.125rem;
    color: var(--color-text);
    outline: none;
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

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

/* Features Grid */
.features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

@media (min-width: 640px) {
    .features {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.feature-text h3 {
    margin: 0 0 0.25rem;
    font-size: 1rem;
    font-weight: 600;
}

.feature-text p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Results Page */
.results-page {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.results-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-top: 1rem;
}

.results-logo {
    display: flex;
    justify-content: center;
}

.results-logo a {
    display: block;
}

.results-logo img {
    height: 60px;
    width: auto;
}

.results-logo-light {
    display: block;
}

.results-logo-dark {
    display: none;
}

[data-theme="dark"] .results-logo-light {
    display: none;
}

[data-theme="dark"] .results-logo-dark {
    display: block;
}

.back-link {
    position: absolute;
    left: 1rem;
    top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    transition: all 0.2s ease;
}

.back-link:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.results-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 0;
    text-align: center;
}

.share-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.share-button:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

/* Error Card */
.error-card {
    background: var(--color-error-light);
    border: 1px solid var(--color-error);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.error-icon {
    font-size: 1.5rem;
}

.error-card p {
    margin: 0;
    color: var(--color-text);
}

/* DNS Sections */
.dns-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

/* Subdomain Section - highlighted */
.subdomain-section {
    border-color: var(--color-primary);
    border-width: 2px;
}

.subdomain-section .section-header {
    background: var(--color-primary-light);
}

/* Root Domain Header */
.root-domain-header {
    margin: 2rem 0 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border);
}

.root-domain-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* Record Group within sections */
.record-group {
    margin-bottom: 1.5rem;
}

.record-group:last-child {
    margin-bottom: 0;
}

.record-type-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin: 0 0 0.75rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
}

.section-icon {
    font-size: 1.25rem;
}

.provider-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.provider-icon {
    width: 16px;
    height: 16px;
}

.section-content {
    padding: 1.5rem;
}

/* Record Lists */
.record-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.record-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.record-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text);
    word-break: break-all;
}

.record-value.full-width {
    flex: 1;
}

.copy-btn {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.copy-btn:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

/* Record Groups */
.record-group {
    margin-bottom: 1.5rem;
}

.record-group:last-child {
    margin-bottom: 0;
}

.record-group h4 {
    margin: 0 0 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Records Table */
.records-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.records-table th,
.records-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.records-table th {
    background: var(--color-bg-tertiary);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.records-table code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.priority-cell {
    font-weight: 600;
    color: var(--color-text-secondary);
    width: 80px;
}

.action-cell {
    width: 50px;
    text-align: right;
}

/* Security Records */
.security-record {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

.security-record:last-child {
    margin-bottom: 0;
}

.security-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.security-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

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

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

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

.security-content {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    background: var(--color-bg-secondary);
    padding: 0.75rem;
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
}

.security-hint {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.security-hint.warning {
    color: var(--color-warning);
}

/* No Records Message */
.no-records {
    color: var(--color-text-muted);
    font-style: italic;
    margin: 0;
}

/* Lookup Meta */
.lookup-meta {
    text-align: center;
    padding: 1rem;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.lookup-meta p {
    margin: 0;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    background: var(--color-text);
    color: var(--color-bg);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

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

/* Footer */
.site-footer {
    background: var(--color-bg);
    padding: 1.5rem;
    text-align: center;
}

.footer-content p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-nav {
    margin-top: 0.75rem;
}

.footer-nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
}

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

/* DNS Server Info */
.dns-server-info {
    margin-bottom: 1.5rem;
}

.dns-server-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.dns-server-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius);
    flex-shrink: 0;
}

.dns-server-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.dns-server-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dns-server-name {
    font-weight: 600;
    color: var(--color-text);
}

.dns-server-ip {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.dns-server-stats {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.125rem;
}

.dns-server-time {
    font-weight: 600;
    color: var(--color-success);
    font-size: 0.875rem;
}

.dns-server-location {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

@media (max-width: 640px) {
    .dns-server-card {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }

    .dns-server-details {
        align-items: center;
    }

    .dns-server-stats {
        align-items: center;
    }
}

/* Ad Placements */
.ad-container {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.ad-slot {
    background: var(--color-bg-secondary);
    border: none;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.ad-slot a {
    display: block;
    line-height: 0;
}

.ad-slot img {
    max-width: 100%;
    height: auto;
}

.ad-slot--728x90 {
    width: 728px;
    height: 90px;
    max-width: 100%;
}

.ad-slot--300x600 {
    width: 300px;
    height: 600px;
}

.ad-slot--160x600 {
    width: 160px;
    height: 600px;
}

/* Results page with sidebar ad */
.results-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 1024px) {
    .results-layout {
        grid-template-columns: 1fr 300px;
    }
}

.results-main {
    min-width: 0;
}

.results-sidebar {
    display: none;
}

@media (min-width: 1024px) {
    .results-sidebar {
        display: block;
    }
    
    .results-sidebar .ad-slot {
        position: sticky;
        top: 5rem;
    }
}

/* Hide ads on very small screens */
@media (max-width: 480px) {
    .ad-container {
        display: none;
    }
}

/* Responsive */
@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

    .logo-icon {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .search-container {
        flex-direction: column;
    }

    .search-button {
        justify-content: center;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .results-title {
        font-size: 1.25rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .records-table {
        font-size: 0.875rem;
    }

    .records-table th,
    .records-table td {
        padding: 0.5rem;
    }
}

/* Learn Pages */
.learn-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.learn-header {
    text-align: center;
    margin-bottom: 3rem;
}

.learn-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.learn-header .lead {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.learn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.learn-card {
    display: block;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

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

.learn-card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.learn-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 0.5rem;
}

.learn-card p {
    color: var(--color-text-secondary);
    margin: 0 0 1rem;
    font-size: 0.95rem;
}

.learn-card-link {
    color: var(--color-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Learn Article */
.breadcrumb {
    margin-bottom: 2rem;
}

.breadcrumb a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.learn-article {
    line-height: 1.8;
}

.article-header {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.article-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.article-header .lead {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
}

.article-section {
    margin-bottom: 2.5rem;
}

.article-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 1rem;
    padding-top: 1rem;
}

.article-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
}

.article-section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem;
}

.article-section p {
    margin: 0 0 1rem;
}

.article-section ul,
.article-section ol {
    margin: 0 0 1rem;
    padding-left: 1.5rem;
}

.article-section li {
    margin-bottom: 0.5rem;
}

.article-section code {
    background: var(--color-bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.block-code {
    display: block;
    padding: 1rem;
    margin: 1rem 0;
    overflow-x: auto;
}

.info-box {
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    padding: 1rem 1.5rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 1.5rem 0;
}

.info-box h4 {
    margin: 0 0 0.5rem;
    font-weight: 600;
}

.info-box p:last-child,
.info-box ul:last-child,
.info-box ol:last-child {
    margin-bottom: 0;
}

.info-box code {
    background: rgba(255,255,255,0.3);
}

[data-theme="dark"] .info-box code {
    background: rgba(0,0,0,0.2);
}

.warning-box {
    background: var(--color-warning-light);
    border-left: 4px solid var(--color-warning);
    padding: 1rem 1.5rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 1.5rem 0;
}

.warning-box h4 {
    margin: 0 0 0.5rem;
    font-weight: 600;
}

.warning-box p:last-child {
    margin-bottom: 0;
}

/* Step List */
.step-list {
    margin: 1.5rem 0;
}

.step {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.step-number {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.step-content h4 {
    margin: 0 0 0.25rem;
    font-weight: 600;
}

.step-content p {
    margin: 0;
    color: var(--color-text-secondary);
}

/* Comparison & Provider Lists */
.comparison-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.comparison-item {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.comparison-item h4 {
    margin: 0 0 0.5rem;
}

.comparison-item p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.provider-list {
    display: grid;
    gap: 1rem;
    margin: 1.5rem 0;
}

.provider-item {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
}

.provider-item h4 {
    margin: 0 0 0.25rem;
}

.provider-item code {
    font-size: 0.85rem;
}

.provider-item p {
    margin: 0.5rem 0 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.numbered-list {
    counter-reset: list-counter;
    list-style: none;
    padding-left: 0;
}

.numbered-list li {
    counter-increment: list-counter;
    padding-left: 2rem;
    position: relative;
    margin-bottom: 0.75rem;
}

.numbered-list li::before {
    content: counter(list-counter);
    position: absolute;
    left: 0;
    width: 1.5rem;
    height: 1.5rem;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Tables */
.syntax-table,
.config-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.95rem;
}

.syntax-table td,
.config-table th,
.config-table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    text-align: left;
}

.syntax-table td:first-child {
    width: 200px;
    background: var(--color-bg-tertiary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.config-table th {
    background: var(--color-bg-tertiary);
    font-weight: 600;
}

.provider-config {
    margin: 1.5rem 0;
    padding: 1.25rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.provider-config h3,
.provider-config h4 {
    margin: 0 0 0.75rem;
}

.provider-config .note {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-style: italic;
    margin-top: 0.5rem;
}

/* Benefits & Flow */
.benefits-list {
    display: grid;
    gap: 1rem;
    margin: 1.5rem 0;
}

.benefit {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.benefit-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.benefit h4 {
    margin: 0 0 0.25rem;
}

.benefit p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.flow-step {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    text-align: center;
    min-width: 150px;
}

.flow-step h4 {
    margin: 0 0 0.25rem;
    color: var(--color-primary);
}

.flow-step p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    font-weight: 300;
}

/* Checklist */
.checklist {
    margin: 1.5rem 0;
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    cursor: default;
}

.checklist-item input {
    margin-top: 0.25rem;
}

/* CTA Box */
.cta-box {
    background: var(--color-primary-light);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    margin-top: 3rem;
}

.cta-box h3 {
    margin: 0 0 0.5rem;
}

.cta-box p {
    margin: 0 0 1.5rem;
    color: var(--color-text-secondary);
}

.cta-box .btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 500;
    transition: background 0.2s ease;
}

.cta-box .btn:hover {
    background: var(--color-primary-hover);
}

@media (max-width: 640px) {
    .learn-header h1 {
        font-size: 1.75rem;
    }

    .article-header h1 {
        font-size: 1.5rem;
    }

    .flow-diagram {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .syntax-table td:first-child {
        width: auto;
    }
}