:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --success: #1f8a65;
  --error: #cf2d56;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;
  --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --section: 80px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--canvas);
  color: var(--body);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--ink); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.rr-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.rr-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
}

.rr-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.rr-nav__logo {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.2px;
}

.rr-nav__links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.rr-nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  line-height: 1.4;
  transition: color 0.15s;
}

.rr-nav__link:hover { color: var(--ink); }

.rr-nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.rr-nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.rr-nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.rr-nav__burger.open span:nth-child(2) { opacity: 0; }
.rr-nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.rr-hero {
  padding: 80px 0 60px;
  background: var(--canvas);
}

.rr-hero__label {
  display: inline-block;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  margin-bottom: 20px;
}

.rr-hero__title {
  font-family: var(--font-sans);
  font-size: 56px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--ink);
  max-width: 800px;
  margin-bottom: 20px;
}

.rr-hero__sub {
  font-size: 16px;
  color: var(--body);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.5;
}

.rr-hero__img {
  margin-top: 48px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
  max-height: 480px;
}

.rr-hero__img img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.rr-hero__img-caption {
  padding: 10px 16px;
  background: var(--surface-card);
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--hairline);
}

.rr-section {
  padding: var(--section) 0;
}

.rr-section--soft {
  background: var(--canvas-soft);
  border-top: 1px solid var(--hairline-soft);
  border-bottom: 1px solid var(--hairline-soft);
}

.rr-section__label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.rr-section__title {
  font-size: 36px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.72px;
  margin-bottom: 16px;
}

.rr-section__intro {
  font-size: 16px;
  color: var(--body);
  max-width: 640px;
  line-height: 1.5;
  margin-bottom: 48px;
}

.rr-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.rr-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.rr-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.rr-card__tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  background: var(--surface-strong);
  color: var(--ink);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  margin-bottom: 16px;
}

.rr-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 8px;
}

.rr-card__text {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
}

.rr-article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.rr-article-card__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.rr-article-card__body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.rr-article-card__tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  background: var(--surface-strong);
  color: var(--ink);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  margin-bottom: 12px;
  align-self: flex-start;
}

.rr-article-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 10px;
}

.rr-article-card__excerpt {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: 16px;
  flex: 1;
}

.rr-article-card__meta {
  font-size: 13px;
  color: var(--muted);
}

.rr-article-card__link {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  border-bottom: 1px solid var(--primary);
  transition: color 0.15s;
}

.rr-article-card__link:hover { color: var(--primary-active); border-color: var(--primary-active); }

.rr-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  line-height: 1;
}

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

.rr-btn--primary:hover { background: var(--primary-active); color: var(--on-primary); }

.rr-btn--secondary {
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
}

.rr-btn--secondary:hover { background: var(--surface-strong); }

.rr-divider {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 0;
}

.rr-page-hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--hairline);
}

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

.rr-page-hero__title {
  font-size: 36px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.72px;
  line-height: 1.2;
  margin-bottom: 12px;
}

.rr-page-hero__sub {
  font-size: 16px;
  color: var(--body);
  max-width: 600px;
}

.rr-page-hero__meta {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}

.rr-article-body {
  max-width: 720px;
  padding: 48px 0 80px;
}

.rr-article-body h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.325px;
  line-height: 1.25;
  margin-top: 40px;
  margin-bottom: 14px;
}

.rr-article-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 28px;
  margin-bottom: 10px;
}

.rr-article-body p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 16px;
}

.rr-article-body ul, .rr-article-body ol {
  margin: 0 0 16px 20px;
}

.rr-article-body ul { list-style: disc; }
.rr-article-body ol { list-style: decimal; }

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

.rr-article-body a {
  color: var(--primary);
  border-bottom: 1px solid currentColor;
}

.rr-article-body a:hover { color: var(--primary-active); }

.rr-article-body figure {
  margin: 32px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
}

.rr-article-body figure img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
}

.rr-article-body figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--muted);
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
}

.rr-article-body .rr-highlight-box {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
}

.rr-article-body .rr-highlight-box p {
  margin: 0;
  font-size: 15px;
}

.rr-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.rr-info-cell {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: 20px;
}

.rr-info-cell__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.rr-info-cell__value {
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.11px;
}

.rr-form-section {
  padding: var(--section) 0;
}

.rr-form {
  max-width: 560px;
}

.rr-form__row {
  margin-bottom: 16px;
}

.rr-form__label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}

.rr-form__input,
.rr-form__textarea {
  display: block;
  width: 100%;
  background: var(--surface-card);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  height: 44px;
  outline: none;
  transition: border-color 0.15s;
}

.rr-form__textarea {
  height: auto;
  min-height: 120px;
  resize: vertical;
}

.rr-form__input:focus,
.rr-form__textarea:focus {
  border-color: var(--ink);
}

.rr-form__submit {
  height: 44px;
  padding: 12px 20px;
  background: var(--ink);
  color: var(--canvas);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s;
}

.rr-form__submit:hover { background: #3a3830; }
.rr-form__submit:disabled { opacity: 0.6; cursor: not-allowed; }

.rr-form__message {
  display: none;
  margin-top: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
}

.rr-form__message--success {
  background: #e8f5f0;
  color: var(--success);
  border: 1px solid #b8ddd0;
}

.rr-cookie {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  padding: 16px 24px;
  z-index: 200;
}

.rr-cookie__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.rr-cookie__text {
  font-size: 14px;
  color: var(--body);
  flex: 1;
  min-width: 200px;
}

.rr-cookie__text a { color: var(--primary); border-bottom: 1px solid currentColor; }

.rr-cookie__actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.rr-prose {
  max-width: 720px;
  padding: 48px 0 80px;
}

.rr-prose h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.325px;
  margin-top: 40px;
  margin-bottom: 14px;
}

.rr-prose h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 28px;
  margin-bottom: 10px;
}

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

.rr-prose ul {
  margin: 0 0 16px 20px;
  list-style: disc;
}

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

.rr-prose a { color: var(--primary); border-bottom: 1px solid currentColor; }
.rr-prose a:hover { color: var(--primary-active); }

.rr-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline-soft);
  margin-bottom: 0;
}

.rr-breadcrumb a { color: var(--muted); }
.rr-breadcrumb a:hover { color: var(--ink); }
.rr-breadcrumb__sep { color: var(--muted-soft); }

@media (max-width: 1024px) {
  .rr-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .rr-hero__title { font-size: 44px; }
  .rr-info-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .rr-nav__burger { display: flex; }

  .rr-nav__links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
  }

  .rr-nav__links.open { display: flex; }

  .rr-nav__links li { border-bottom: 1px solid var(--hairline-soft); }
  .rr-nav__link { display: block; padding: 12px 0; font-size: 16px; }

  .rr-hero__title { font-size: 32px; letter-spacing: -1px; }
  .rr-grid-3 { grid-template-columns: 1fr; }
  .rr-grid-2 { grid-template-columns: 1fr; }
  .rr-info-grid { grid-template-columns: 1fr; }
  .rr-section__title { font-size: 26px; letter-spacing: -0.325px; }
}

@media (max-width: 640px) {
  .rr-hero { padding: 48px 0 40px; }
  .rr-hero__img img { height: 240px; }
  .rr-cookie__inner { flex-direction: column; align-items: flex-start; }
}