:root {
  --bg: #f7f3ff;
  --bg-soft: #efe7ff;
  --surface: #ffffff;
  --surface-soft: #fbf8ff;
  --text: #251a3d;
  --muted: #6d618a;
  --line: #e6dcfb;
  --primary: #7a3ff0;
  --primary-dark: #6127d4;
  --accent: #ad7cff;
  --accent-soft: #f1e8ff;
  --success: #6f42ff;
  --shadow: 0 18px 48px rgba(122, 63, 240, 0.10);
  --radius: 24px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  line-height: 1.65;
  background:
    radial-gradient(circle at top left, rgba(173, 124, 255, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(122, 63, 240, 0.14), transparent 24%),
    linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 220px, #fcfbff 100%);
}

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

a:hover {
  text-decoration: underline;
}

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

.container {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.site-shell {
  overflow: hidden;
}

/* top / hero */
.hero {
  padding: 22px 0 50px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 12px 0 28px;
  flex-wrap: wrap;
}

.site-logo {
  font-size: 25px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

.main-nav,
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
}

.main-nav a,
.footer-links a {
  color: var(--text);
  font-weight: 700;
  font-size: 15px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.14fr 0.86fr;
  gap: 30px;
  align-items: start;
}

.eyebrow,
.section-tag,
.panel-label {
  display: inline-block;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.01em;
  background: var(--accent-soft);
  color: var(--primary);
  padding: 8px 14px;
}

.hero-copy h1 {
  margin: 16px 0 18px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 780px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 18px;
}

.hero-meta span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  box-shadow: var(--shadow);
}

.hero-lead {
  font-size: 19px;
  color: var(--text);
}

.hero-copy p,
.section-head p,
.method-card p,
.market-card p,
.guide-item p,
.author-content p,
.faq-item p,
.site-footer p {
  color: var(--muted);
}

.hero-copy strong,
.section strong,
.ranking-card strong,
.author-content strong,
.faq-item strong {
  color: var(--text);
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 14px;
  font-weight: 800;
  border: 1px solid transparent;
  transition: 0.2s ease;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #9c69ff);
  color: #fff;
  box-shadow: 0 12px 28px rgba(122, 63, 240, 0.22);
}

.btn-primary:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

.btn-secondary {
  background: #fff;
  color: var(--text);
  border-color: var(--line);
}

.btn-secondary:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.btn-full {
  width: 100%;
}

/* hero panel */
.hero-panel {
  background: linear-gradient(180deg, #ffffff 0%, #fbf8ff 100%);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.score-badge {
  width: 82px;
  height: 82px;
  margin: 18px 0 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #a56dff);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  font-weight: 900;
  box-shadow: 0 14px 30px rgba(122, 63, 240, 0.20);
}

.hero-panel h2 {
  margin: 0 0 12px;
  font-size: 32px;
  line-height: 1.15;
}

.check-list,
.rank-points {
  list-style: none;
  padding: 0;
  margin: 0;
}

.check-list li,
.rank-points li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
}

.check-list li::before,
.rank-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--success);
  font-weight: 900;
}

/* common sections */
.section {
  padding: 30px 0;
}

.section-head {
  margin-bottom: 22px;
}

.section-head h2 {
  margin: 12px 0 10px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

/* methodology */
.method-grid,
.market-grid,
.guide-grid,
.criteria-grid {
  display: grid;
  gap: 16px;
}

.method-grid {
  grid-template-columns: repeat(3, 1fr);
}

.method-card,
.market-card,
.guide-item,
.author-card,
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.method-card,
.market-card,
.guide-item {
  border-radius: 22px;
  padding: 20px;
}

.method-card h3,
.market-card h3,
.guide-item h3,
.why-box h4,
.author-content h2 {
  margin: 0 0 8px;
}

.method-card h3,
.market-card h3,
.guide-item h3 {
  font-size: 21px;
}

/* tables */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.overview-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}

.overview-table th,
.overview-table td {
  text-align: left;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.overview-table th {
  background: #faf7ff;
  color: var(--text);
  font-size: 15px;
}

.overview-table td {
  color: var(--muted);
  font-size: 15px;
}

.overview-table td strong {
  color: var(--text);
}

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

/* rankings */
.ranking-stack {
  display: grid;
  gap: 18px;
}

.ranking-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.ranking-card-featured {
  background: linear-gradient(180deg, #ffffff 0%, #faf6ff 100%);
  border-color: #d9c8ff;
}

.ranking-top {
  display: grid;
  grid-template-columns: 190px 1fr auto;
  gap: 18px;
  align-items: start;
  margin-bottom: 18px;
}

.ranking-badge-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ranking-number {
  width: 88px;
  height: 88px;
  border-radius: 24px;
  background: #f2eaff;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  font-weight: 900;
}

.ranking-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--muted);
}

.ranking-title-wrap h3 {
  margin: 0;
  font-size: 30px;
  line-height: 1.15;
}

.ranking-link {
  display: inline-block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
}

.ranking-intro {
  margin-top: 0;
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 18px 0;
}

.score-card {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
}

.score-card span {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.score-card strong {
  display: block;
  font-size: 17px;
}

.why-box {
  margin-top: 18px;
  padding: 18px;
  border-radius: 18px;
  background: #faf7ff;
  border: 1px solid var(--line);
}

/* market */
.market-grid {
  grid-template-columns: repeat(4, 1fr);
}

/* guide */
.guide-grid {
  grid-template-columns: repeat(3, 1fr);
}

/* author */
.author-card {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 22px;
  border-radius: 26px;
  padding: 24px;
}

.author-avatar {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #a06aff);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  font-weight: 900;
  box-shadow: 0 14px 30px rgba(122, 63, 240, 0.18);
}

.author-content h2 {
  margin-top: 12px;
  font-size: 34px;
}

/* faq */
.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  border-radius: 18px;
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 20px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  position: relative;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 18px;
  font-size: 24px;
  line-height: 1;
  color: var(--primary);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 0;
  padding: 0 20px 20px;
}

/* footer */
.site-footer {
  padding: 36px 0 48px;
  margin-top: 10px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(8px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
  align-items: start;
}

.site-footer p {
  max-width: 760px;
  margin: 12px 0 0;
}

/* responsive */
@media (max-width: 1100px) {
  .hero-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .market-grid,
  .guide-grid,
  .score-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ranking-top {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(var(--max), calc(100% - 20px));
  }

  .method-grid,
  .market-grid,
  .guide-grid,
  .score-grid,
  .author-card {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    font-size: 34px;
  }

  .section-head h2,
  .author-content h2 {
    font-size: 28px;
  }

  .btn {
    width: 100%;
  }

  .ranking-number {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    font-size: 24px;
  }

  .hero-meta {
    flex-direction: column;
    align-items: flex-start;
  }
}