:root {
  --ink: #2f211b;
  --muted: #6f5b50;
  --paper: #fffdf8;
  --cream: #f6efe3;
  --sand: #ead9bf;
  --brand: #7a3e20;
  --brand-dark: #542714;
  --accent: #c8873e;
  --line: rgba(84, 39, 20, 0.16);
  --shadow: 0 18px 50px rgba(63, 36, 23, 0.09);
  --radius: 20px;
  --display: "Iowan Old Style", Baskerville, "Palatino Linotype", Georgia, serif;
  --body: "Avenir Next", Avenir, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--brand);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--brand-dark);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid #1677b8;
  outline-offset: 4px;
  border-radius: 6px;
}

h1,
h2,
h3,
h4 {
  color: var(--brand-dark);
  font-family: var(--display);
  line-height: 1.12;
  text-wrap: balance;
}

p,
li {
  text-wrap: pretty;
}

.container {
  width: min(90%, 1180px);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 3000;
  padding: 10px 16px;
  transform: translateY(-160%);
  border-radius: 999px;
  background: var(--brand-dark);
  color: #fff;
}

.skip-link:focus {
  transform: translateY(0);
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.94);
  backdrop-filter: blur(14px);
}

.navbar {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  min-width: 0;
  color: var(--brand-dark);
  font-family: var(--display);
  font-size: clamp(1.16rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.2vw, 32px);
}

.nav-links a {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--brand);
}

.menu-toggle {
  display: none;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper);
  color: var(--brand-dark);
  cursor: pointer;
  font-size: 1.35rem;
}

.affiliate-note {
  border-bottom: 1px solid rgba(84, 39, 20, 0.1);
  background: #f0e3cf;
  color: #4e382d;
}

.affiliate-note p {
  width: min(90%, 1180px);
  margin: 0 auto;
  padding: 10px 0;
  font-size: 0.84rem;
  line-height: 1.5;
  text-align: center;
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: 610px;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 120px 5vw;
  background-image:
    linear-gradient(90deg, rgba(44, 25, 17, 0.78), rgba(44, 25, 17, 0.25)),
    url("../blog/images/index.jpg");
  background-position: center 42%;
  background-size: cover;
}

.hero::after {
  content: "EDITORIAL GUIDE • AGE-GAP DATING • 18+";
  position: absolute;
  right: 4vw;
  bottom: 24px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero-content {
  width: min(920px, 100%);
  margin: 0 auto;
  color: #fff;
  text-align: left;
}

.hero h1 {
  max-width: 850px;
  margin: 0 0 24px;
  color: #fff;
  font-size: clamp(2.65rem, 6vw, 5.7rem);
  letter-spacing: -0.055em;
}

.hero p {
  max-width: 700px;
  margin: 0 0 34px;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.hero-btns,
.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 0.94rem;
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}

.btn:hover {
  transform: translateY(-2px);
  background: var(--brand-dark);
  color: #fff;
  box-shadow: 0 10px 24px rgba(44, 25, 17, 0.2);
}

.btn-mobile,
.btn-download {
  background: #fff;
  color: var(--brand-dark);
}

.btn-mobile:hover,
.btn-download:hover {
  background: #f8ead5;
  color: var(--brand-dark);
}

.btn-pc {
  margin-left: 0;
  background: var(--brand);
  color: #fff;
}

.section {
  padding: clamp(70px, 9vw, 120px) 0;
}

.section:nth-of-type(even) {
  background: var(--paper);
}

.section-title {
  max-width: 820px;
  margin: 0 auto 46px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.035em;
  text-align: center;
}

.platform-intro {
  display: grid;
  max-width: 920px;
  margin: 0 auto;
  gap: 18px;
  font-size: 1.08rem;
}

.platform-intro p {
  margin: 0;
}

.features,
.audience,
.advantages-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card,
.feature-card,
.audience-card,
.story-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.feature-card,
.audience-card,
.story-card {
  padding: clamp(24px, 3vw, 38px);
}

.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: "";
  position: absolute;
  right: -42px;
  bottom: -48px;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: rgba(200, 135, 62, 0.1);
}

.feature-icon,
.advantage-icon {
  color: var(--accent);
  font-size: 1.65rem;
}

.feature-card h3,
.audience-card h3 {
  margin: 16px 0 10px;
  font-size: 1.4rem;
}

.feature-card p,
.audience-card li,
.advantage-content p {
  color: var(--muted);
}

.success-stories {
  background: #e9d7bd;
}

.story-card {
  max-width: 920px;
  margin: 0 auto;
}

.story-card ul {
  display: grid;
  margin: 0;
  padding-left: 1.2rem;
  gap: 10px;
}

.audience {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.audience-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

.advantages-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.advantage-content h3 {
  margin: 0 0 6px;
  font-size: 1.25rem;
}

.advantage-content p {
  margin: 0;
}

.cta {
  padding: clamp(72px, 10vw, 120px) 0;
  background: var(--brand-dark);
  color: #fff;
  text-align: center;
}

.cta h2 {
  max-width: 780px;
  margin: 0 auto 18px;
  color: #fff;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
}

.cta p {
  max-width: 720px;
  margin: 0 auto 32px;
  color: rgba(255, 255, 255, 0.8);
}

.cta .download-buttons {
  justify-content: center;
}

.blog-list-container {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
}

.content-hub-intro {
  margin: 0 0 3rem;
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border-radius: var(--radius);
  background: var(--sand);
}

.content-hub-intro > h2 {
  margin-top: 0;
  text-align: center;
}

.hub-topics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.hub-topics article {
  padding: 1.2rem;
  border: 1px solid rgba(116, 67, 38, 0.12);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.hub-topics h3 {
  margin-top: 0;
}

@media (max-width: 680px) {
  .hub-topics {
    grid-template-columns: 1fr;
  }
}

.blog-list-card {
  display: flex;
  min-width: 0;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 10px 34px rgba(63, 36, 23, 0.07);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.blog-list-card:hover {
  transform: translateY(-5px);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.blog-list-img {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--sand);
}

.blog-list-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-list-content {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 24px;
}

.blog-list-meta,
.blog-post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 0.82rem;
}

.blog-list-title {
  margin: 12px 0 10px;
  font-size: 1.48rem;
}

.blog-list-excerpt {
  display: -webkit-box;
  overflow: hidden;
  margin: 0 0 18px;
  color: var(--muted);
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.blog-read-more {
  margin-top: auto;
  font-weight: 750;
}

.blog-container {
  width: min(90%, 980px);
  margin: 0 auto;
}

.blog-post-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.blog-post-img {
  overflow: hidden;
  background: var(--sand);
}

.blog-post-img img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
}

.blog-post-content {
  padding: clamp(28px, 6vw, 72px);
}

.blog-post-title {
  font-size: clamp(2rem, 5vw, 4rem);
}

.blog-post-content h2 {
  margin-top: 2.1em;
  font-size: clamp(1.65rem, 3.2vw, 2.4rem);
}

.blog-post-content h3 {
  margin-top: 1.7em;
  font-size: 1.4rem;
}

.blog-post-content p,
.blog-post-content li {
  color: #49372e;
}

.blog-post-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.blog-post-content th,
.blog-post-content td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.quick-answer {
  margin: 28px 0 34px;
  padding: 22px 24px;
  border-left: 5px solid var(--accent);
  border-radius: 0 14px 14px 0;
  background: #f5ead9;
}

.article-lead {
  font-size: 1.12rem;
  line-height: 1.8;
  color: var(--ink);
}

.key-takeaways,
.editorial-note,
.author-box,
.related-guides,
.example-block {
  margin: 1.75rem 0;
  padding: 1.35rem 1.5rem;
  border: 1px solid rgba(116, 67, 38, 0.16);
  border-radius: var(--radius-sm);
  background: var(--cream);
}

.editorial-note,
.example-block {
  border-left: 4px solid var(--ochre);
}

.key-takeaways h2,
.author-box h2,
.related-guides h2 {
  margin-top: 0;
}

.related-guides ul {
  display: grid;
  gap: 0.65rem;
  padding-left: 1.2rem;
}

.article-registration {
  margin-top: 2.5rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: var(--radius);
  color: #fff8ef;
  background: var(--brand-dark);
  text-align: center;
}

.article-registration h2,
.article-registration p {
  color: inherit;
}

.blog-post-content table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
  font-size: 0.96rem;
}

.blog-post-content th,
.blog-post-content td {
  padding: 0.8rem;
  border: 1px solid rgba(116, 67, 38, 0.18);
  text-align: left;
  vertical-align: top;
}

.blog-post-content th {
  color: var(--wine);
  background: var(--sand);
}

@media (max-width: 560px) {
  .blog-post-content table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .key-takeaways,
  .editorial-note,
  .author-box,
  .related-guides,
  .example-block {
    padding: 1.1rem;
  }
}

.quick-answer h2 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

.quick-answer p {
  margin: 0;
}

.blog-post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 36px;
}

.blog-tag {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  background: #efe1cd;
  color: var(--brand-dark);
  font-size: 0.82rem;
  text-decoration: none;
}

.legal-layout {
  width: min(90%, 850px);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 110px) 0;
}

.legal-layout h1 {
  margin: 0 0 18px;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
}

.legal-layout h2 {
  margin-top: 2em;
  font-size: 1.7rem;
}

.legal-lead {
  padding: 20px 22px;
  border-left: 5px solid var(--accent);
  background: var(--paper);
}

footer {
  padding: 64px 0 28px;
  background: #261914;
  color: rgba(255, 255, 255, 0.78);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 36px;
  margin-bottom: 44px;
}

.footer-column h2,
.footer-column h4 {
  margin: 0 0 18px;
  color: #fff;
  font-family: var(--body);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-column ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-column li {
  margin-bottom: 9px;
}

.footer-column a,
.footer-column span {
  color: rgba(255, 255, 255, 0.76);
  text-decoration: none;
}

.footer-column a:hover {
  color: #fff;
}

.copyright {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.82rem;
  text-align: center;
}

.copyright a {
  color: #f3d7b0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(1px, 1px, 1px, 1px) !important;
  white-space: nowrap !important;
}

@media (max-width: 900px) {
  .features,
  .blog-list-container {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-content {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .navbar {
    min-height: 70px;
    gap: 10px;
  }

  .logo {
    max-width: calc(100% - 58px);
    overflow: hidden;
    font-size: clamp(1rem, 5.4vw, 1.45rem);
    text-overflow: ellipsis;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: fixed;
    inset: 70px 0 0;
    z-index: 1200;
    display: flex;
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 20px 7vw calc(32px + env(safe-area-inset-bottom));
    transform: translateX(-105%);
    background: var(--paper);
    overscroll-behavior: contain;
    transition: transform 220ms ease;
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .nav-links a {
    padding: 17px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 1.1rem;
  }

  .hero {
    min-height: 590px;
    padding: 96px 5vw;
    background-attachment: scroll;
    background-position: 60% center;
  }

  .hero-content {
    text-align: center;
  }

  .hero-btns {
    justify-content: center;
  }

  .features,
  .audience,
  .advantages-list,
  .blog-list-container {
    grid-template-columns: 1fr;
  }

  .blog-post-card {
    border-radius: 18px;
  }

  .blog-post-content {
    padding: 28px 22px 40px;
  }

  .blog-post-content table {
    display: block;
    overflow-x: auto;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 420px) {
  .container,
  .blog-container {
    width: min(92%, 1180px);
  }

  .logo {
    font-size: 1.03rem;
    letter-spacing: -0.045em;
  }

  .hero {
    min-height: 620px;
  }

  .hero h1 {
    font-size: clamp(2.35rem, 12vw, 3.2rem);
  }

  .btn {
    width: 100%;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}