@charset "UTF-8";
/*
 * 連載ハブ /series/quantum-braket 専用。
 * コーポレートの style.css（WP スナップショット由来）は読み込まない。
 */

:root {
  --navy: #0f3870;
  --navy-deep: #0a2a57;
  --cta: #35bfaf;
  --cta-dark: #279f92;
  --ink: #1c2430;
  --ink-mute: #55606e;
  --line: #d9dee6;
  --bg-tint: #f4f6f9;
  --mincho: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", "MS PMincho", serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, "Noto Sans JP", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.9;
}

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

a {
  color: var(--navy);
}

.qb-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.qb-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.qb-header_inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 64px;
}

.qb-header_logo {
  display: flex;
  align-items: center;
}

.qb-header_name {
  margin: 0;
  font-size: 13px;
  color: var(--ink-mute);
}

.qb-header_pp {
  margin-left: auto;
  font-size: 13px;
  color: var(--ink-mute);
}

.qb-hero {
  padding: 72px 0 64px;
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
}

.qb-hero_eyebrow {
  margin: 0 0 20px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cta);
}

.qb-hero_title {
  margin: 0 0 28px;
  font-family: var(--mincho);
  font-size: 36px;
  line-height: 1.4;
  font-weight: 600;
}

.qb-hero_lead {
  margin: 0 0 40px;
  font-size: 17px;
  color: #e6ecf5;
}

.qb-hero_actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.qb-btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 4px;
  background: var(--cta);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s;
}

.qb-btn:hover {
  background: var(--cta-dark);
}

.qb-btn--ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.qb-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
}

.qb-toc {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.qb-toc .qb-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.qb-toc a {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.qb-toc a:hover {
  text-decoration: underline;
}

.qb-section {
  padding: 56px 0;
  background: #fff;
}

.qb-section--tint {
  background: var(--bg-tint);
}

.qb-section h2 {
  margin: 0 0 12px;
  font-family: var(--mincho);
  font-size: 24px;
  font-weight: 600;
  color: var(--navy);
}

.qb-section p {
  margin: 0 0 16px;
}

.qb-lead {
  margin: 0 0 28px;
  color: var(--ink-mute);
}

.qb-section ul {
  margin: 0;
  padding-left: 1.2em;
}

.qb-episode {
  margin: 0 0 32px;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
}

.qb-episode:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.qb-episode h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
}

.qb-placeholder {
  margin: 0 0 12px;
  padding: 12px 14px;
  border: 1px dashed var(--line);
  background: rgba(15, 56, 112, 0.04);
  color: var(--ink-mute);
  font-size: 15px;
}

.qb-episode_links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 16px 0 0;
  font-size: 14px;
}

.qb-glossary {
  margin: 0;
}

.qb-glossary > div {
  margin: 0 0 16px;
}

.qb-glossary dt {
  font-weight: 700;
}

.qb-glossary dd {
  margin: 6px 0 0;
}

.qb-faq details {
  margin: 0 0 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: #fff;
}

.qb-faq summary {
  font-weight: 700;
  cursor: pointer;
}

.qb-faq details p {
  margin: 12px 0 0;
}

.qb-footer {
  padding: 40px 0;
  background: var(--navy);
  color: #fff;
  font-size: 13px;
}

.qb-footer_name {
  margin: 0 0 8px;
  font-family: var(--mincho);
  font-size: 16px;
}

.qb-footer_addr {
  margin: 0 0 12px;
  color: #cfd9e8;
}

.qb-footer a {
  color: #fff;
}

.qb-footer_links {
  margin: 0;
  display: flex;
  gap: 24px;
}

@media screen and (max-width: 767px) {
  .qb-wrap {
    padding: 0 20px;
  }

  .qb-header_name {
    display: none;
  }

  .qb-hero {
    padding: 48px 0 44px;
  }

  .qb-hero_title {
    font-size: 26px;
  }

  .qb-hero_lead {
    font-size: 16px;
    margin-bottom: 28px;
  }

  .qb-section {
    padding: 40px 0 48px;
  }

  .qb-section h2 {
    font-size: 20px;
  }

  .qb-episode h3 {
    font-size: 17px;
  }
}