:root {
  color-scheme: light;
  --ink: #193042;
  --muted: #647785;
  --navy: #173f5f;
  --navy-2: #0f304a;
  --teal: #137c78;
  --teal-soft: #e4f4f1;
  --gold: #d8a33d;
  --paper: #fffdfa;
  --canvas: #f3f5f2;
  --line: #d7dfdc;
  --danger: #a9423b;
  --success: #1d7455;
  --shadow: 0 8px 30px rgba(23, 63, 95, .08);
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--canvas); }
button, select, textarea, input { font: inherit; }
button, .button-like { min-height: 44px; }
button { cursor: pointer; }
a { color: #176899; }
.hidden { display: none !important; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 100; background: white; padding: 10px; }
.skip-link:focus { top: 12px; }

.site-header { color: white; background: linear-gradient(130deg, var(--navy-2), var(--navy)); border-bottom: 4px solid var(--gold); }
.header-inner { max-width: 900px; margin: auto; padding: 22px 18px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.site-header h1 { margin: 1px 0 4px; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(25px, 6vw, 35px); letter-spacing: .04em; }
.site-header h1 span { display: inline-grid; place-items: center; width: 1.45em; height: 1.45em; margin-right: .18em; color: var(--navy); background: var(--gold); border-radius: 50%; font-size: .72em; vertical-align: .12em; }
.eyebrow, .kicker { margin: 0; font-size: 11px; letter-spacing: .16em; font-weight: 800; }
.eyebrow { color: #bcd5e5; }
.kicker { color: var(--teal); }
.header-copy { margin: 0; color: #d7e6ee; font-size: 13px; }
.header-button { color: white; background: transparent; border: 1px solid #abc8d9; border-radius: 9px; padding: 8px 12px; }

.app-shell { max-width: 900px; min-height: 70vh; margin: auto; padding: 18px; }
.panel { background: var(--paper); border: 1px solid rgba(23, 63, 95, .08); border-radius: 16px; padding: 20px; margin-bottom: 16px; box-shadow: var(--shadow); }
.panel.compact { padding: 13px 16px; }
.hero { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 22px; border-left: 5px solid var(--teal); }
.hero h2 { margin: 8px 0; font-family: "Yu Mincho", serif; font-size: clamp(22px, 5vw, 29px); }
.hero p { margin: 0; line-height: 1.8; }
.pill { display: inline-block; color: #27615d; background: var(--teal-soft); border-radius: 999px; padding: 5px 10px; font-size: 12px; font-weight: 700; }

button, .button-like { color: var(--navy); background: white; border: 1px solid #b9c9d1; border-radius: 10px; padding: 10px 14px; font-weight: 700; }
button:hover, .button-like:hover { border-color: var(--teal); }
button:focus-visible, a:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid #e7b54c; outline-offset: 2px; }
button:disabled { opacity: .45; cursor: default; }
button.primary { color: white; background: var(--teal); border-color: var(--teal); }
button.large { padding: 14px 18px; }
.text-button, .back-button, .footer-button { min-height: 0; padding: 3px 0; color: #176899; background: none; border: 0; }
.button-like { display: inline-flex; align-items: center; cursor: pointer; }

.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 15px; }
.section-heading.outside { padding: 8px 4px 0; }
.section-heading h2, .view-header h2 { margin: 3px 0 0; font-size: 21px; }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat { padding: 13px; background: #f4f8f7; border-radius: 11px; text-align: center; }
.stat strong { display: block; color: var(--navy); font-size: 24px; }
.stat span { color: var(--muted); font-size: 12px; }

.menu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 18px; }
.menu-card { min-height: 128px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 5px; padding: 17px; text-align: left; background: var(--paper); border: 1px solid #dce4e1; box-shadow: 0 5px 18px rgba(23, 63, 95, .06); }
.menu-card.featured { color: white; background: var(--navy); border-color: var(--navy); }
.menu-card small { color: var(--muted); font-weight: 500; }
.menu-card.featured small { color: #d2e1e9; }
.menu-icon { display: inline-grid; place-items: center; min-width: 36px; height: 36px; padding: 0 7px; color: var(--teal); background: var(--teal-soft); border-radius: 9px; font-family: serif; font-weight: 800; }
.menu-card.featured .menu-icon { color: var(--navy); background: var(--gold); }

.official-card, .utility-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.official-card h2, .utility-panel h2 { margin: 4px 0 6px; }
.official-card p, .utility-panel p { margin: 0; line-height: 1.7; }
.link-stack { display: grid; gap: 8px; }
.link-stack a, .source-links a { padding: 10px 12px; color: #175d83; background: #f2f7f7; border-radius: 9px; text-decoration: none; font-weight: 700; }
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.sustainability-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; border-left: 5px solid var(--gold); }
.sustainability-panel h2 { margin: 4px 0 7px; }
.sustainability-panel p { margin: 0; line-height: 1.75; }
.policy-link { display: inline-flex; align-items: center; min-height: 44px; padding: 10px 13px; background: #f2f7f7; border-radius: 9px; text-decoration: none; font-weight: 800; }
.ad-container { position: relative; min-height: 96px; margin: 0 0 16px; padding: 22px 10px 8px; overflow: hidden; background: #eef1ef; border: 1px solid #d9dfdc; border-radius: 12px; text-align: center; }
.ad-label { position: absolute; top: 5px; left: 10px; color: var(--muted); font-size: 10px; letter-spacing: .12em; }
.muted { color: var(--muted); font-size: 13px; }
.small-link { font-size: 13px; font-weight: 700; }
.exam-group-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 12px; }
.exam-group { padding: 16px; border-radius: 12px; }
.law-group { background: #e8f3f1; border: 1px solid #c4dfda; }
.knowledge-group { background: #f1edf5; border: 1px solid #d9cce3; }
.exam-group-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.exam-group-head strong { font-size: 18px; }
.exam-group-head span { padding: 4px 9px; color: white; background: var(--navy); border-radius: 20px; font-size: 12px; font-weight: 800; }
.exam-group p { margin: 5px 0 9px; color: var(--muted); font-size: 12px; }
.exam-group ul { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.exam-group li { padding: 5px 8px; background: rgba(255,255,255,.72); border-radius: 7px; font-size: 13px; font-weight: 700; }
.admin-scope { margin-top: 12px; color: var(--muted); font-size: 13px; }
.admin-scope summary { color: var(--navy); cursor: pointer; font-weight: 700; }
.admin-scope p { margin-bottom: 0; line-height: 1.7; }
.trend-summary { margin: 14px 0 0; padding: 12px 14px; color: #31576c; background: #edf6f8; border-left: 4px solid var(--teal); border-radius: 8px; font-size: 13px; line-height: 1.75; }
.priority-panel { border-top: 5px solid var(--gold); }
.forecast-total { padding: 6px 11px; color: white; background: var(--navy); border-radius: 999px; font-size: 13px; }
.priority-intro { margin: -4px 0 14px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.priority-list { display: grid; gap: 7px; margin: 0; padding: 0; list-style: none; counter-reset: priority; }
.priority-list li { counter-increment: priority; display: grid; grid-template-columns: 28px 34px minmax(130px, .8fr) 1.5fr; align-items: center; gap: 9px; padding: 10px 12px; background: #f5f8f7; border-radius: 9px; }
.priority-list li::before { content: counter(priority); color: var(--muted); text-align: center; font-size: 12px; font-weight: 800; }
.priority-list small { color: var(--muted); line-height: 1.5; }
.rank-badge { display: inline-grid; place-items: center; width: 30px; height: 30px; color: white; border-radius: 8px; font-weight: 900; }
.s-rank { background: #a9423b; }
.a-rank { background: #b47b17; }
.priority-start { width: 100%; margin-top: 14px; }
.forecast-disclaimer { margin: 9px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; }

.resume-card { margin-bottom: 14px; padding: 15px 17px; color: white; background: var(--navy); border-radius: 13px; box-shadow: var(--shadow); }
.resume-card p { margin: 0 0 10px; }
.resume-card button { margin-right: 6px; }
.view-header { min-height: 62px; display: flex; align-items: center; gap: 18px; margin-bottom: 13px; }
.basis-note { padding: 11px 13px; color: #675225; background: #fff5d9; border-left: 4px solid var(--gold); border-radius: 8px; font-size: 13px; line-height: 1.7; }
.subject-list { display: grid; gap: 12px; }
.subject-card { background: var(--paper); border-radius: 14px; overflow: hidden; box-shadow: var(--shadow); }
.subject-summary { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 17px; border: 0; border-radius: 0; text-align: left; }
.subject-summary strong { font-size: 17px; }
.subject-summary small { display: block; margin-top: 3px; color: var(--muted); font-weight: 500; }
.lesson-list { padding: 0 12px 12px; }
.lesson-link { width: 100%; display: flex; align-items: center; justify-content: space-between; margin-top: 7px; padding: 12px; text-align: left; }
.lesson-link span { color: var(--muted); font-size: 12px; }

.lesson-article h2 { margin: 4px 0 10px; font-family: "Yu Mincho", serif; font-size: 27px; }
.lead { color: #395365; font-size: 16px; line-height: 1.9; }
.lesson-article h3 { margin: 25px 0 8px; color: var(--navy); }
.lesson-article p, .lesson-article li { line-height: 1.95; }
.lesson-diagram { margin: 26px 0 10px; padding: 16px; background: linear-gradient(145deg, #eef7f6, #f8fbfa); border: 1px solid #c9dfdc; border-radius: 13px; }
.lesson-diagram h3 { margin: 3px 0 14px; font-size: 18px; }
.diagram-label { display: inline-block; margin: 0 !important; padding: 3px 8px; color: white; background: var(--teal); border-radius: 999px; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.diagram-content { display: flex; align-items: stretch; gap: 8px; }
.diagram-step { flex: 1; display: grid; place-items: center; min-height: 64px; padding: 10px; color: var(--navy); background: white; border: 1px solid #c6d9d6; border-radius: 9px; text-align: center; font-size: 13px; font-weight: 800; line-height: 1.55; }
.diagram-arrow { align-self: center; color: var(--teal); font-size: 22px; font-weight: 800; }
.compare-diagram .diagram-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.diagram-group { padding: 12px; background: white; border-top: 4px solid var(--gold); border-radius: 9px; }
.diagram-group strong { color: var(--navy); }
.diagram-group ul { margin: 8px 0 0; padding-left: 19px; }
.diagram-group li { font-size: 12px; line-height: 1.7; }
.lesson-diagram figcaption { margin-top: 12px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.point-box { margin: 22px 0; padding: 15px; background: #fff5d9; border-left: 4px solid var(--gold); border-radius: 8px; line-height: 1.8; }
.source-links { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 15px; border-top: 1px solid var(--line); }

.sticky-actions { position: sticky; bottom: 8px; z-index: 5; display: flex; justify-content: center; gap: 7px; padding: 9px; background: rgba(243, 245, 242, .94); backdrop-filter: blur(8px); border-radius: 14px; }
.quiz-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 12px; }
.quiz-toolbar label { color: var(--muted); font-size: 12px; }
select { display: block; min-width: 180px; margin-top: 4px; padding: 9px 30px 9px 10px; color: var(--ink); background: white; border: 1px solid #b9c9d1; border-radius: 8px; }
.counter { font-weight: 800; }
progress { width: 100%; height: 8px; margin: 0 0 12px; accent-color: var(--teal); }
.question-card h3 { margin: 12px 0 18px; font-size: 20px; line-height: 1.75; }
.question-meta { display: flex; gap: 7px; flex-wrap: wrap; }
.question-meta span { padding: 4px 8px; color: #456477; background: #edf3f3; border-radius: 20px; font-size: 12px; }
.question-meta .priority-badge { color: white; font-weight: 800; }
.question-meta .priority-s { background: #a9423b; }
.question-meta .priority-a { background: #b47b17; }
.option-list { display: grid; gap: 9px; }
.option-button { width: 100%; padding: 14px; text-align: left; line-height: 1.65; }
.option-button.selected { border-color: var(--navy); background: #eaf1f5; }
.option-button.correct { color: #15583f; background: #e4f5eb; border-color: #5aa785; }
.option-button.wrong { color: #84352f; background: #fff0ee; border-color: #c77c76; }
.feedback { margin-top: 17px; padding: 15px; background: #f2f6f5; border-radius: 10px; line-height: 1.8; }
.feedback.correct { border-left: 4px solid var(--success); }
.feedback.wrong { border-left: 4px solid var(--danger); }
.feedback h4 { margin: 0 0 6px; }
.feedback p { margin: 5px 0; }
.feedback a { font-weight: 700; }
.trend-note { margin-top: 14px; padding: 12px 13px; color: #31576c; background: #edf6f8; border: 1px solid #cce2e7; border-radius: 9px; }
.trend-note p { margin: 5px 0 7px; font-size: 13px; line-height: 1.7; }
.trend-note .priority-reason { color: #6e351f; font-weight: 800; }
.trend-note a { font-size: 13px; }

.word-bank { display: flex; flex-wrap: wrap; gap: 8px; margin: 17px 0; }
.word-bank button.active { color: white; background: var(--navy); }
.blank-answer { min-height: 52px; padding: 12px; background: #f1f5f4; border: 1px dashed #9eafaa; border-radius: 9px; line-height: 1.8; }
.written-prompt { padding: 14px; background: #f2f5f5; border-radius: 9px; line-height: 1.9; }
.written-area { width: 100%; min-height: 130px; margin-top: 13px; padding: 13px; border: 1px solid #aebfbd; border-radius: 9px; line-height: 1.8; resize: vertical; }
.char-count { text-align: right; color: var(--muted); font-size: 13px; }
.model-answer { margin-top: 15px; padding: 15px; background: #fff5d9; border-radius: 9px; line-height: 1.8; }

.stats-subject { margin-bottom: 12px; }
.stats-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.stats-row strong { font-size: 17px; }
.stats-bar { height: 9px; margin-top: 10px; overflow: hidden; background: #e7ecea; border-radius: 10px; }
.stats-bar span { display: block; height: 100%; background: var(--teal); }
.toast { position: fixed; left: 50%; bottom: 22px; z-index: 20; transform: translateX(-50%); max-width: calc(100% - 30px); padding: 12px 17px; color: white; background: #142f43; border-radius: 10px; box-shadow: var(--shadow); }
footer { padding: 25px 18px 38px; color: var(--muted); text-align: center; font-size: 12px; }
footer p { margin: 5px; }
.footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 14px; margin: 12px auto; line-height: 1.8; }
.consent-banner { position: fixed; left: 50%; bottom: 12px; z-index: 50; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; width: min(860px, calc(100% - 24px)); padding: 16px; color: var(--ink); background: white; border: 1px solid #b9c9d1; border-radius: 14px; box-shadow: 0 12px 40px rgba(15,48,74,.25); transform: translateX(-50%); }
.consent-banner p { margin: 5px 0 0; font-size: 12px; line-height: 1.65; }
.consent-actions { display: flex; gap: 7px; }

@media (max-width: 680px) {
  .app-shell { padding: 13px; }
  .header-inner { padding: 18px 14px; }
  .header-copy { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero button { width: 100%; }
  .menu-grid { grid-template-columns: repeat(2, 1fr); gap: 9px; }
  .menu-card { min-height: 122px; padding: 14px; }
  .official-card, .utility-panel, .sustainability-panel { grid-template-columns: 1fr; }
  .exam-group-grid { grid-template-columns: 1fr; }
  .priority-list li { grid-template-columns: 24px 32px 1fr; }
  .priority-list small { grid-column: 3; }
  .stat-grid { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .stat { padding: 10px 5px; }
  .stat strong { font-size: 20px; }
  .section-heading { align-items: flex-end; }
  .flow-diagram .diagram-content { flex-direction: column; }
  .flow-diagram .diagram-arrow { align-self: center; transform: rotate(90deg); line-height: 1; }
  .quiz-toolbar { align-items: center; }
  select { min-width: 150px; max-width: 57vw; }
  .sticky-actions { display: grid; grid-template-columns: repeat(3, 1fr); }
  .sticky-actions button { padding: 9px 5px; font-size: 12px; }
  .consent-banner { grid-template-columns: 1fr; }
  .consent-actions { display: grid; grid-template-columns: 1fr 1fr; }
}

@media (max-width: 390px) {
  .site-header h1 { font-size: 24px; }
  .header-button { display: none !important; }
  .menu-grid { grid-template-columns: 1fr 1fr; }
  .menu-card { min-height: 112px; }
  .panel { padding: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}