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

:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --ink: #26251e;
    --body: #5a5852;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --primary: #f54e00;
    --primary-active: #d04200;
    --on-primary: #ffffff;
    --timeline-thinking: #dfa88f;
    --timeline-grep: #9fc9a2;
    --timeline-read: #9fbbe0;
    --timeline-edit: #c0a8dd;
    --timeline-done: #c08532;
    --success: #1f8a65;
    --error: #cf2d56;
}

body {
    background: var(--canvas);
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 16px;
    color: var(--body);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--primary); }

.vr-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    height: 64px;
}

.vr-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 40px;
}

.vr-logo {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.3px;
    color: var(--ink);
    text-decoration: none;
    flex-shrink: 0;
}

.vr-logo span { color: var(--primary); }

.vr-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    flex: 1;
}

.vr-nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    text-decoration: none;
    white-space: nowrap;
}

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

.vr-nav-cta {
    background: var(--primary);
    color: var(--on-primary) !important;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    margin-left: auto;
}

.vr-nav-cta:hover { background: var(--primary-active); color: var(--on-primary) !important; }

.vr-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    margin-left: auto;
}

.vr-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
}

.vr-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 240px;
    grid-template-areas: "main sidebar";
    gap: 48px;
    align-items: start;
    padding-top: 48px;
    padding-bottom: 80px;
}

.vr-main {
    grid-area: main;
    min-width: 0;
}

.vr-sidebar {
    grid-area: sidebar;
    position: sticky;
    top: 80px;
}

.vr-sidebar-section {
    margin-bottom: 32px;
}

.vr-sidebar-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.vr-sidebar-links {
    list-style: none;
}

.vr-sidebar-links li {
    border-bottom: 1px solid var(--hairline-soft);
}

.vr-sidebar-links a {
    display: block;
    padding: 10px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    text-decoration: none;
}

.vr-sidebar-links a:hover { color: var(--primary); }

.vr-sidebar-pill-track {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.vr-pill {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--ink);
}

.vr-pill-thinking { background: var(--timeline-thinking); }
.vr-pill-grep { background: var(--timeline-grep); }
.vr-pill-read { background: var(--timeline-read); }
.vr-pill-edit { background: var(--timeline-edit); }
.vr-pill-done { background: var(--timeline-done); color: var(--on-primary); }

.vr-hero {
    padding: 80px 0 64px;
    max-width: 860px;
}

.vr-hero-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 20px;
}

.vr-hero h1 {
    font-size: 56px;
    font-weight: 400;
    letter-spacing: -1.4px;
    color: var(--ink);
    line-height: 1.1;
    margin-bottom: 24px;
}

.vr-hero-sub {
    font-size: 18px;
    color: var(--body);
    line-height: 1.5;
    max-width: 600px;
    margin-bottom: 32px;
}

.vr-hero-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.vr-articles-section {
    margin-bottom: 64px;
}

.vr-section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--hairline);
}

.vr-article-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--hairline);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 32px;
}

.vr-article-card {
    background: var(--surface-card);
    padding: 24px;
    display: block;
    text-decoration: none;
    color: inherit;
}

.vr-article-card:hover { background: var(--canvas-soft); }

.vr-article-card-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 10px;
    display: block;
}

.vr-article-card-title {
    font-size: 20px;
    font-weight: 400;
    letter-spacing: -0.3px;
    color: var(--ink);
    line-height: 1.3;
    margin-bottom: 10px;
}

.vr-article-card-desc {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.vr-breadcrumb {
    margin-bottom: 32px;
}

.vr-breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 13px;
    color: var(--muted);
}

.vr-breadcrumb li::after { content: '/'; margin-left: 6px; }
.vr-breadcrumb li:last-child::after { content: ''; }

.vr-breadcrumb a {
    color: var(--body);
    text-decoration: none;
}

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

.vr-article-header {
    margin-bottom: 40px;
}

.vr-article-header h1 {
    font-size: 40px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: 16px;
}

.vr-article-header-sub {
    font-size: 18px;
    color: var(--body);
    line-height: 1.55;
}

.vr-toc {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 40px;
    max-width: 480px;
}

.vr-toc-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 14px;
}

.vr-toc ol {
    padding-left: 18px;
}

.vr-toc li {
    margin-bottom: 8px;
}

.vr-toc a {
    font-size: 14px;
    color: var(--body);
    text-decoration: none;
}

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

.vr-prose h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.32px;
    color: var(--ink);
    margin-top: 48px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--hairline);
}

.vr-prose h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-top: 28px;
    margin-bottom: 12px;
}

.vr-prose p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.7;
    margin-bottom: 16px;
}

.vr-prose ul, .vr-prose ol {
    padding-left: 22px;
    margin-bottom: 16px;
}

.vr-prose li {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 6px;
}

.vr-disclaimer {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--timeline-read);
    border-radius: 8px;
    padding: 14px 18px;
    margin: 24px 0;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.5;
}

.vr-faq {
    margin-top: 40px;
    margin-bottom: 40px;
}

.vr-faq-title {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.2px;
    color: var(--ink);
    margin-bottom: 20px;
}

.vr-faq details {
    border-bottom: 1px solid var(--hairline);
}

.vr-faq details:first-of-type { border-top: 1px solid var(--hairline); }

.vr-faq summary {
    padding: 16px 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--ink);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.vr-faq summary::after {
    content: '+';
    font-size: 20px;
    color: var(--muted);
    flex-shrink: 0;
}

.vr-faq details[open] summary::after { content: '−'; }

.vr-faq-body {
    padding: 0 0 20px;
    font-size: 15px;
    color: var(--body);
    line-height: 1.65;
}

.vr-related {
    border-top: 1px solid var(--hairline);
    padding-top: 40px;
    margin-top: 48px;
}

.vr-related-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 20px;
}

.vr-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.vr-related-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-decoration: none;
    color: inherit;
}

.vr-related-card:hover { border-color: var(--hairline-strong); }

.vr-related-card-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
}

.vr-related-card-desc {
    font-size: 13px;
    color: var(--muted);
}

.vr-contact-form {
    max-width: 520px;
}

.vr-form-group {
    margin-bottom: 20px;
}

.vr-form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.vr-form-group input,
.vr-form-group textarea {
    width: 100%;
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 16px;
    font-family: inherit;
    color: var(--ink);
    outline: none;
}

.vr-form-group input:focus,
.vr-form-group textarea:focus {
    border-color: var(--primary);
}

.vr-form-error {
    font-size: 13px;
    color: var(--error);
    margin-top: 4px;
    display: none;
}

.vr-btn {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    letter-spacing: 0;
}

.vr-btn:hover { background: var(--primary-active); }

.vr-form-message {
    display: none;
    padding: 14px 18px;
    border-radius: 8px;
    font-size: 15px;
    margin-top: 16px;
    border: 1px solid var(--hairline);
}

.vr-form-message.success {
    background: #ecfaf5;
    color: var(--success);
    border-color: #9fdfc7;
}

.vr-page-content {
    max-width: 720px;
}

.vr-page-content h1 {
    font-size: 40px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: 24px;
    line-height: 1.2;
}

.vr-page-content h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.32px;
    color: var(--ink);
    margin-top: 40px;
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--hairline);
}

.vr-page-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-top: 24px;
    margin-bottom: 10px;
}

.vr-page-content p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.7;
    margin-bottom: 16px;
}

.vr-page-content ul,
.vr-page-content ol {
    padding-left: 22px;
    margin-bottom: 16px;
}

.vr-page-content li {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 6px;
}

.vr-page-content a { color: var(--primary); text-decoration: underline; }

.vr-cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ink);
    color: var(--canvas);
    padding: 20px 32px;
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    z-index: 9999;
    flex-wrap: wrap;
    font-size: 14px;
}

.vr-cookie-banner p { flex: 1; min-width: 200px; line-height: 1.5; }
.vr-cookie-banner a { color: var(--timeline-read); text-decoration: underline; }

.vr-cookie-buttons { display: flex; gap: 10px; }

.vr-cookie-accept {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
}

.vr-cookie-reject {
    background: transparent;
    color: var(--canvas);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
}

.vr-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 24px 48px;
}

.vr-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.vr-footer-logo {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.3px;
    color: var(--ink);
    margin-bottom: 8px;
}

.vr-footer-tagline {
    font-size: 14px;
    color: var(--muted);
    margin-bottom: 16px;
    line-height: 1.4;
}

.vr-footer-disc {
    font-size: 12px;
    color: var(--muted-soft);
    line-height: 1.5;
    margin-bottom: 10px;
}

.vr-footer-col-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 14px;
}

.vr-footer-col ul { list-style: none; }

.vr-footer-col li {
    margin-bottom: 8px;
}

.vr-footer-col a {
    font-size: 14px;
    color: var(--body);
    text-decoration: none;
}

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

.vr-footer-col p {
    font-size: 14px;
    color: var(--body);
    margin-bottom: 6px;
}

.vr-footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    font-size: 13px;
    color: var(--muted);
    padding-top: 20px;
    border-top: 1px solid var(--hairline-soft);
}

.vr-article-img {
    width: 100%;
    max-height: 320px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 32px;
    display: block;
}

@media (max-width: 1024px) {
    .vr-layout {
        grid-template-columns: 1fr;
        grid-template-areas: "main";
    }
    .vr-sidebar { display: none; }
    .vr-footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .vr-nav { display: none; }
    .vr-nav.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: 16px 24px; gap: 16px; z-index: 99; }
    .vr-hamburger { display: flex; }
    .vr-hero h1 { font-size: 36px; }
    .vr-article-grid { grid-template-columns: 1fr; }
    .vr-footer-inner { grid-template-columns: 1fr; }
    .vr-layout { padding: 0 16px 48px; padding-top: 32px; }
}

@media (max-width: 480px) {
    .vr-hero h1 { font-size: 28px; }
    .vr-article-header h1 { font-size: 28px; }
    .vr-cookie-banner { flex-direction: column; align-items: flex-start; }
}