:root {
  --background: #f8fcfd;
  --surface: #ffffff;
  --text: #354052;
  --subtext: #718091;

  --blue: #a9dfee;
  --blue-light: #e8f7fb;
  --blue-dark: #4f91a7;

  --orange: #ffb88d;
  --orange-light: #fff0e7;
  --orange-dark: #d8794b;

  --purple: #c8baed;
  --purple-light: #f0ebfb;

  --border: rgba(66, 93, 111, 0.13);
  --shadow: 0 20px 60px rgba(75, 104, 120, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 90% 5%, var(--orange-light), transparent 24%),
    radial-gradient(circle at 3% 30%, var(--blue-light), transparent 25%),
    var(--background);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Helvetica Neue",
    "Hiragino Sans",
    "Yu Gothic",
    sans-serif;
  line-height: 1.8;
}

a {
  color: inherit;
}

/* ヘッダー */

.site-header {
  position: sticky;
  top: 16px;
  z-index: 10;

  display: flex;
  align-items: center;
  justify-content: space-between;

  width: min(1120px, calc(100% - 40px));
  margin: 16px auto 0;
  padding: 15px 23px;

  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  box-shadow: 0 10px 35px rgba(75, 103, 119, 0.08);
  backdrop-filter: blur(16px);
}

.logo {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 26px;
}

nav a {
  color: var(--subtext);
  font-size: 13px;
  text-decoration: none;
}

nav a:hover {
  color: var(--text);
}

/* 全体 */

main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

/* ファーストビュー */

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 75px;

  min-height: 720px;
  padding: 100px 0;
}

.eyebrow {
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.17em;
}

.hero h1 {
  margin-top: 18px;
  font-size: clamp(55px, 7vw, 88px);
  font-weight: 750;
  letter-spacing: -0.065em;
  line-height: 1;
}

.hero h1 span {
  display: block;
  color: var(--orange-dark);
}

.hero-description {
  max-width: 600px;
  margin-top: 28px;
  color: var(--subtext);
  font-size: 17px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 25px;
}

.tags span {
  padding: 6px 12px;
  color: var(--blue-dark);
  background: var(--blue-light);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
}

.tags span:nth-child(2n) {
  color: var(--orange-dark);
  background: var(--orange-light);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 36px;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;

  padding: 13px 22px;

  color: var(--text);
  background: var(--blue);
  border-radius: 100px;

  font-size: 14px;
  font-weight: 700;
  text-decoration: none;

  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.primary-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(76, 145, 166, 0.2);
}

.text-link {
  color: var(--subtext);
  font-size: 14px;
  text-underline-offset: 5px;
}

/* 連合イメージ */

.association-panel {
  position: relative;
  padding: 34px;

  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 30px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.association-panel::before {
  position: absolute;
  top: -45px;
  right: -35px;
  z-index: -1;

  width: 150px;
  height: 150px;

  content: "";
  background: var(--purple);
  border-radius: 50%;
  opacity: 0.7;
}

.association-panel::after {
  position: absolute;
  bottom: -40px;
  left: -35px;
  z-index: -1;

  width: 120px;
  height: 120px;

  content: "";
  background: var(--orange);
  border-radius: 45% 55% 65% 35%;
  opacity: 0.65;
}

.panel-label {
  margin-bottom: 22px;
  color: var(--subtext);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.association-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;

  padding: 20px 22px;
  border-radius: 18px;

  font-size: 15px;
  font-weight: 700;
}

.blue-row {
  background: var(--blue-light);
}

.orange-row {
  background: var(--orange-light);
}

.plus {
  color: var(--subtext);
  font-weight: 400;
}

.association-divider {
  padding: 14px;
  color: var(--subtext);
  font-size: 11px;
  text-align: center;
}

.panel-note {
  margin-top: 22px;
  color: var(--subtext);
  font-size: 12px;
}

/* 実装状況 */

.status-section {
  padding: 70px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 32px;
  box-shadow: var(--shadow);
}

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

.status-card {
  min-height: 230px;
  padding: 25px;
  border: 1px solid var(--border);
  border-radius: 22px;
}

.status-card.ready {
  background: var(--blue-light);
}

.status-card.pending {
  background: var(--orange-light);
}

.status-card > span {
  color: var(--blue-dark);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.status-card.pending > span {
  color: var(--orange-dark);
}

.status-card h3 {
  margin-top: 42px;
  font-size: 20px;
}

.status-card p {
  margin-top: 8px;
  color: var(--subtext);
  font-size: 12px;
}

/* セクション共通 */

.content-section {
  padding: 110px 0;
  border-top: 1px solid var(--border);
}

.section-heading {
  margin-bottom: 38px;
}

.section-heading > p {
  color: var(--blue-dark);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.17em;
}

.section-heading h2 {
  margin-top: 5px;
  font-size: clamp(37px, 5vw, 55px);
  letter-spacing: -0.05em;
  line-height: 1.2;
}

.section-introduction {
  max-width: 820px;
  margin-bottom: 38px;
  color: var(--subtext);
  font-size: 17px;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.text-block {
  padding: 34px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 25px;
}

.text-block h3 {
  margin-bottom: 14px;
  font-size: 20px;
}

.text-block p {
  color: var(--subtext);
  font-size: 15px;
}

.text-block p + p {
  margin-top: 14px;
}

.notice {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 22px;

  margin-top: 22px;
  padding: 24px 28px;

  background: var(--orange-light);
  border-radius: 20px;
}

.notice strong {
  color: var(--orange-dark);
}

.notice p {
  color: var(--subtext);
  font-size: 14px;
}

/* 概念カード */

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.concept-card {
  min-height: 210px;
  padding: 25px;

  background: var(--blue-light);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 23px;
}

.concept-card:nth-child(2),
.concept-card:nth-child(5) {
  background: var(--orange-light);
}

.concept-card:nth-child(3),
.concept-card:nth-child(6) {
  background: var(--purple-light);
}

.concept-card span {
  color: var(--subtext);
  font-size: 11px;
  font-weight: 700;
}

.concept-card h3 {
  margin-top: 40px;
  font-size: 20px;
}

.concept-card p {
  margin-top: 8px;
  color: var(--subtext);
  font-size: 13px;
}

/* 刺激語テーブル */

.table-wrapper {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 22px 24px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

th {
  color: var(--subtext);
  background: var(--blue-light);
  font-size: 12px;
  letter-spacing: 0.08em;
}

td {
  font-size: 14px;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.small-note {
  margin-top: 18px;
  color: var(--subtext);
  font-size: 12px;
}

/* ブロック */

.block-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
}

.block-list article {
  padding: 25px 27px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 21px;
}

.block-list article:nth-child(4),
.block-list article:nth-child(7) {
  background: var(--blue-light);
}

.block-list span {
  color: var(--blue-dark);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.13em;
}

.block-list h3 {
  margin-top: 7px;
  font-size: 17px;
}

.block-list p {
  margin-top: 4px;
  color: var(--subtext);
  font-size: 13px;
}

/* Dスコア */

.score-box {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  align-items: center;
  gap: 35px;

  padding: 38px;

  background: var(--purple-light);
  border-radius: 27px;
}

.score-box h3 {
  margin-bottom: 10px;
  font-size: 21px;
}

.score-box p {
  color: var(--subtext);
  font-size: 14px;
}

.formula {
  padding: 25px;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 18px;
  font-size: 16px;
  font-weight: 700;
  text-align: center;
}

/* 限界 */

.limitations-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 17px;
}

.limitations-grid article {
  padding: 28px;
  background: var(--surface);
  border-left: 5px solid var(--orange);
  border-radius: 0 22px 22px 0;
  box-shadow: 0 10px 30px rgba(75, 104, 120, 0.05);
}

.limitations-grid h3 {
  font-size: 17px;
}

.limitations-grid p {
  margin-top: 8px;
  color: var(--subtext);
  font-size: 13px;
}

/* プライバシー */

.privacy-section {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 50px;

  margin: 80px 0;
  padding: 48px;

  background:
    linear-gradient(
      135deg,
      var(--blue-light),
      var(--orange-light)
    );
  border-radius: 30px;
}

.privacy-section h2 {
  margin-top: 7px;
  font-size: clamp(27px, 4vw, 40px);
  letter-spacing: -0.04em;
}

.privacy-section p:not(.eyebrow) {
  max-width: 680px;
  margin-top: 13px;
  color: var(--subtext);
  font-size: 14px;
}

/* 参考文献 */

.references ol {
  padding: 34px 34px 34px 58px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
}

.references li {
  padding-left: 7px;
  color: var(--subtext);
  font-size: 13px;
}

.references li + li {
  margin-top: 14px;
}

.references a {
  color: var(--blue-dark);
  text-underline-offset: 3px;
}

/* フッター */

footer {
  display: flex;
  justify-content: space-between;

  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 30px 0 45px;

  color: var(--subtext);
  border-top: 1px solid var(--border);
  font-size: 12px;
}

footer a {
  text-underline-offset: 4px;
}

/* スマートフォン */

@media (max-width: 780px) {
  .site-header {
    padding: 14px 17px;
  }

  nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 80px;
    padding: 110px 0;
  }

  .hero h1 {
    font-size: 56px;
  }

  .association-panel {
    margin: 0 15px;
  }

  .two-column,
  .concept-grid,
  .status-grid,
  .block-list,
  .score-box,
  .limitations-grid {
    grid-template-columns: 1fr;
  }

  .notice {
    grid-template-columns: 1fr;
  }

  .privacy-section {
    grid-template-columns: 1fr;
    padding: 32px 27px;
  }

  .status-section {
    padding: 38px 28px;
  }

  .privacy-section .primary-button {
    justify-self: start;
  }

  th,
  td {
    min-width: 130px;
    padding: 17px;
  }

  footer {
    gap: 20px;
  }
}
/* 連合パネル背面の装飾図形を非表示にする */

.association-panel::before,
.association-panel::after {
  display: none;
  content: none;
}