/* ============================================================
   教育現場の現在地 ― style.css
   Design concept: 夕暮れの職員室と出席簿（dusk + attendance ledger）
   Universal Design対応：BIZ UDゴシック採用、コントラスト比・
   フォーカス表示・リンク視認性をWCAG AA相当に調整
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=BIZ+UDPGothic:wght@400;700&family=BIZ+UDGothic:wght@400;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root{
  --paper: #FAEFE2;
  --paper-deep: #F1DBC2;
  --ink: #2A211D;          /* UD: より濃く、地に対して4.5:1以上を確保 */
  --muted: #5C4A3F;        /* UD: 濃度を上げて可読性を確保 */
  --board: #351F3F;        /* 黄昏の紫 dusk purple, replaces chalkboard green */
  --board-light: #7A3556;  /* 茜色がかった紫 mid dusk rose */
  --board-deeper: #1F1329; /* 夜のとばり deepest twilight */
  --chalk: #FFF8ED;        /* 夕焼け雲の白 warm cream-white on dark */
  --gold: #B36A18;         /* UD: 地色に対するコントラストを確保した金色 */
  --gold-soft: #F4C77E;    /* 淡い夕光 soft sunset gold（濃色背景専用） */
  --red: #97331A;          /* UD: 濃度を上げた朱色（本文での使用に配慮） */
  --line: #E7D2B7;
  --line-strong: #C99A69;
  --link: #2E4D8A;         /* UD: 本文中リンク専用の色（下線とセットで使用） */
  --focus-ring: #1D6FE0;   /* UD: フォーカスリング用（背景を問わず視認できる青） */

  --serif: 'BIZ UDPGothic', 'BIZ UDGothic', sans-serif;
  --sans: 'BIZ UDPGothic', 'BIZ UDGothic', 'Hiragino Sans', sans-serif;
  --mono: 'JetBrains Mono', monospace;

  --max: 880px;
}

/* skip link: キーボード・スクリーンリーダー利用者が本文へ直接移動できるように */
.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--board-deeper);
  color: var(--chalk);
  padding: 12px 20px;
  z-index: 1000;
  font-size: 15px;
  font-weight: 700;
  border-radius: 0 0 4px 0;
  text-decoration: underline;
}
.skip-link:focus{
  left: 0;
}

/* フォーカス表示：どの背景色の上でも視認できるよう太めのリングを統一使用 */
a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 2px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.9;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img{max-width:100%;}

a{ color: inherit; }

h1,h2,h3,h4{
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.5;
  margin: 0 0 0.6em;
  letter-spacing: .02em;
}

p{ margin: 0 0 1.3em; }

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------------- header / nav ---------------- */

.site-header{
  background: var(--board-deeper);
  background-image:
    radial-gradient(ellipse at 15% 20%, rgba(244,199,126,0.05), transparent 45%),
    radial-gradient(ellipse at 85% 80%, rgba(193,80,43,0.05), transparent 50%);
  color: var(--chalk);
  position: relative;
  border-bottom: 3px solid var(--gold);
}

.site-header .wrap{
  max-width: 1040px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
  gap: 20px;
}

.brand{
  display:flex;
  flex-direction: column;
  gap: 2px;
  text-decoration:none;
  color: var(--chalk);
  flex-shrink: 0;
}
.brand .brand-eyebrow{
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold-soft);
  text-transform: uppercase;
  white-space: nowrap;
}
.brand .brand-title{
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .04em;
  white-space: nowrap;
}

.nav-toggle{
  display:none;
  background:none;
  border: 1px solid rgba(251,239,221,0.35);
  color: var(--chalk);
  border-radius: 4px;
  width: 40px; height: 36px;
  font-size: 18px;
  cursor:pointer;
}

nav.primary-nav{
  display:flex;
  flex-wrap: wrap;
  gap: 4px 2px;
  justify-content:flex-end;
}

nav.primary-nav a{
  text-decoration:none;
  color: rgba(251,239,221,0.82);
  font-size: 13.5px;
  padding: 7px 10px;
  border-radius: 3px;
  white-space: nowrap;
  transition: color .15s ease, background .15s ease;
  border-bottom: 2px solid transparent;
}
nav.primary-nav a:hover{ color: var(--chalk); background: rgba(255,255,255,0.06); }
nav.primary-nav a.active{
  color: var(--chalk);
  border-bottom: 2px solid var(--gold-soft);
  font-weight: 500;
}

@media (max-width: 880px){
  .nav-toggle{ display:block; }
  nav.primary-nav{
    display:none;
    width: 100%;
    flex-direction: column;
    justify-content: flex-start;
    padding-bottom: 12px;
  }
  nav.primary-nav.open{ display:flex; }
  .site-header .wrap{ flex-wrap: wrap; }
  nav.primary-nav a{ padding: 10px 6px; border-bottom: 1px solid rgba(255,255,255,0.08); border-radius:0; }
  nav.primary-nav a.active{ border-bottom: 1px solid rgba(255,255,255,0.08); border-left: 3px solid var(--gold-soft); padding-left: 10px; }
}

/* ---------------- hero (chalkboard nameplate) ---------------- */

.hero{
  background: linear-gradient(160deg, var(--board-deeper) 0%, var(--board) 32%, var(--board-light) 62%, var(--red) 92%, #A66423 130%);
  color: var(--chalk);
  position: relative;
  padding: 56px 0 68px;
  overflow: hidden;
}
.hero::after{
  /* UD: 背景の明るさに関わらず文字コントラストを確保する均一な暗幕 */
  content:"";
  position:absolute; inset:0;
  background: rgba(10,6,14,0.28);
  z-index: 1;
  pointer-events:none;
}
.hero::before{
  /* setting sun glow, low on the right */
  content:"";
  position:absolute; inset:0;
  background-image:
    radial-gradient(360px 360px at 88% 115%, rgba(244,199,126,0.4), transparent 60%),
    radial-gradient(220px 220px at 92% 105%, rgba(255,255,255,0.12), transparent 65%);
  pointer-events:none;
}
.hero .wrap{ position: relative; max-width: 720px; z-index: 2; }

.hero-photo{
  position:absolute;
  inset:0;
  z-index:0;
  overflow:hidden;
}
.hero-photo img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  opacity:0.5;
  mix-blend-mode:luminosity;
  filter: sepia(0.35) saturate(1.3) contrast(1.05);
}
.hero-photo::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(160deg, var(--board-deeper) 5%, rgba(53,31,63,0.62) 35%, rgba(122,53,86,0.52) 62%, rgba(151,51,26,0.5) 88%, rgba(166,100,35,0.42) 130%);
}
.hero::before{ z-index: 1; }

.photo-credit{
  position: relative;
  z-index: 2;
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(255,255,255,0.7);
}
.photo-credit a{ color: rgba(251,239,221,0.6); text-decoration: underline dotted; }

.eyebrow-tag{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--gold-soft);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.eyebrow-tag::before{
  content:"";
  width: 18px; height: 1px;
  background: var(--gold-soft);
  display:inline-block;
}

.hero h1{
  color: var(--chalk);
  font-size: clamp(28px, 4.4vw, 42px);
  margin-bottom: 18px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.35);
}
.hero .lede{
  color: #FFFFFF;
  font-size: 17px;
  max-width: 62ch;
  margin-bottom: 0;
  text-shadow: 0 1px 6px rgba(0,0,0,0.3);
}
.hero .lede:last-child{ margin-bottom:0; }

.breadcrumb{
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  margin-bottom: 20px;
}
.breadcrumb a{ text-decoration:underline; color: rgba(255,255,255,0.95); }
.breadcrumb a:hover{ color: var(--gold-soft); }

/* ---------------- main content / ledger rule ---------------- */

main{
  background: var(--paper);
}

.section{
  padding: 54px 0;
  border-bottom: 1px solid var(--line);
}
.section:last-of-type{ border-bottom: none; }

.section-inner{
  position: relative;
  padding-left: 26px;
  border-left: 3px solid var(--line-strong);
}
.section-inner::before{
  content: attr(data-mark);
  position:absolute;
  left: -8px; top: 0;
  width: 13px; height: 13px;
  background: var(--gold);
  border-radius: 50%;
  border: 3px solid var(--paper);
}

.kicker{
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 10px;
  display:block;
}

h2.h-title{ font-size: 26px; color: var(--board-deeper); }
h3.h-sub{ font-size: 19px; color: var(--board); margin-top: 1.6em; }

.lead-text{
  font-size: 17px;
  color: var(--ink);
}

.muted{ color: var(--muted); }

/* ---------------- inline content links (UD: 下線+専用色で色覚に依存しない識別) ---------------- */

.section-inner a,
.voice a,
.notice-box a,
table.ledger a,
.summary-band a,
.top-hero + .summary-band a{
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  font-weight: 700;
}
.section-inner a:hover,
.voice a:hover,
.notice-box a:hover,
table.ledger a:hover{
  color: var(--red);
}

/* ---------------- stat callouts (ledger rows) ---------------- */

.stat-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 28px 0 8px;
}
@media (max-width: 620px){ .stat-grid{ grid-template-columns: 1fr; } }

.stat-box{
  background: var(--chalk);
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--gold);
  padding: 18px 20px;
  border-radius: 2px;
}
.stat-box .num{
  font-family: var(--mono);
  font-weight: 700;
  font-size: 30px;
  color: var(--board-deeper);
  display:block;
  line-height: 1.15;
}
.stat-box .num small{ font-size: 15px; font-weight: 500; color: var(--muted); }
.stat-box .label{
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 4px;
  display:block;
}

.stat-strip{
  display:flex;
  overflow-x:auto;
  gap: 12px;
  padding: 4px 0 14px;
  margin: 6px 0 4px;
}
.stat-strip .pill{
  flex: 0 0 auto;
  background: var(--board);
  color: var(--chalk);
  padding: 12px 18px;
  border-radius: 3px;
  min-width: 168px;
}
.stat-strip .pill .num{ font-family: var(--mono); font-size: 22px; font-weight:700; color: var(--gold-soft); display:block; }
.stat-strip .pill .label{ font-size: 12px; color: rgba(251,239,221,0.75); }

/* underline emphasis - red pen mark */
.mark{
  background-image: linear-gradient(transparent 62%, rgba(139,58,43,0.22) 62%);
  padding: 0 1px;
}
.circle{
  border: 2px solid var(--red);
  border-radius: 50% / 40%;
  padding: 0 8px;
  display:inline-block;
}

/* ---------------- callout / voice box ---------------- */

.voice{
  background: var(--paper-deep);
  border: 1px dashed var(--line-strong);
  padding: 20px 22px;
  margin: 26px 0;
  border-radius: 3px;
  font-size: 15px;
  color: var(--ink);
}
.voice .voice-label{
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--red);
  display:block;
  margin-bottom: 8px;
}

.source-note{
  font-size: 13.5px;
  color: var(--muted);
  margin-top: -8px;
  margin-bottom: 26px;
}
.source-note a{ color: var(--link); text-decoration: underline; font-weight: 700; }

/* ---------------- topic index cards (used on top page) ---------------- */

.card-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 28px;
}
@media (max-width: 620px){ .card-grid{ grid-template-columns: 1fr; } }

.topic-card{
  display:block;
  text-decoration:none;
  color: var(--ink);
  background: var(--chalk);
  border: 1px solid var(--line-strong);
  padding: 20px 20px 18px;
  border-radius: 3px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  position: relative;
}
.topic-card:hover{
  transform: translateY(-3px);
  border-color: var(--board);
  box-shadow: 0 10px 22px rgba(53,31,63,0.12);
}
.topic-card .no{
  font-family: var(--mono);
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
}
.topic-card h3{
  font-size: 18px;
  margin: 8px 0 8px;
  color: var(--board-deeper);
}
.topic-card p{
  font-size: 13.5px;
  color: var(--muted);
  margin: 0;
}
.topic-card .go{
  position:absolute; right: 18px; bottom: 16px;
  font-family: var(--mono); font-size: 12px; color: var(--board);
  opacity: .7;
}

/* ---------------- table ---------------- */

table.ledger{
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 30px;
  font-size: 14.5px;
}
table.ledger caption{
  text-align:left;
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 8px;
  font-family: var(--mono);
}
table.ledger th, table.ledger td{
  border-bottom: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}
table.ledger thead th{
  background: var(--paper-deep);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 12.5px;
  color: var(--board-deeper);
  letter-spacing: .03em;
}
table.ledger td.num, table.ledger th.num{ font-family: var(--mono); text-align: right; }

/* ---------------- lists ---------------- */

ul.check, ol.steps{
  padding-left: 0;
  list-style: none;
  margin: 0 0 22px;
}
ul.check li{
  position: relative;
  padding-left: 26px;
  margin-bottom: 12px;
}
ul.check li::before{
  content: "○";
  position:absolute; left:0; top: 0;
  color: var(--gold);
  font-size: 13px;
}
ol.steps{ counter-reset: step; }
ol.steps li{
  position: relative;
  padding-left: 36px;
  margin-bottom: 16px;
  counter-increment: step;
}
ol.steps li::before{
  content: counter(step);
  position:absolute; left:0; top: -1px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--chalk);
  background: var(--board);
  width: 22px; height: 22px;
  border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
}

/* ---------------- prev/next page nav ---------------- */

.page-nav{
  display:flex;
  justify-content: space-between;
  gap: 16px;
  padding: 40px 0 10px;
}
.page-nav a{
  text-decoration:none;
  flex: 1;
  border: 1px solid var(--line-strong);
  padding: 14px 18px;
  border-radius: 3px;
  background: var(--chalk);
  color: var(--ink);
  font-size: 14px;
  transition: border-color .15s ease, background .15s ease;
}
.page-nav a:hover{ border-color: var(--board); background: var(--paper-deep); }
.page-nav a.next{ text-align: right; }
.page-nav .dir{
  display:block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .08em;
  margin-bottom: 4px;
}
.page-nav .ttl{ font-family: var(--serif); font-weight: 700; font-size: 15.5px; }

/* ---------------- footer ---------------- */

footer.site-footer{
  background: var(--board-deeper);
  color: rgba(251,239,221,0.72);
  padding: 40px 0 30px;
  font-size: 13px;
}
footer.site-footer .wrap{ max-width: 1040px; }
footer.site-footer .foot-top{
  display:flex;
  flex-wrap: wrap;
  gap: 30px;
  justify-content: space-between;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(251,239,221,0.14);
  margin-bottom: 18px;
}
footer.site-footer h4{
  color: var(--chalk);
  font-family: var(--sans);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .06em;
  margin-bottom: 10px;
}
footer.site-footer .fcol{ min-width: 160px; }
footer.site-footer ul{ list-style:none; padding:0; margin:0; }
footer.site-footer li{ margin-bottom: 6px; }
footer.site-footer a{ color: rgba(251,239,221,0.72); text-decoration:none; }
footer.site-footer a:hover{ color: var(--gold-soft); }
footer.site-footer .disclaimer{
  font-size: 12px;
  color: rgba(251,239,221,0.5);
  line-height: 1.8;
  max-width: 720px;
}

/* ---------------- top page hero (special, larger) ---------------- */

.top-hero{
  padding: 72px 0 84px;
}
.top-hero h1{
  font-size: clamp(30px, 5vw, 48px);
}
.top-hero .lede{ font-size: 18px; max-width: 58ch; }

.summary-band{
  background: var(--paper-deep);
  padding: 40px 0 46px;
  border-bottom: 1px solid var(--line);
}
.summary-band h2{ font-size: 20px; color: var(--board-deeper); margin-bottom: 6px;}
.summary-band .sub{ color: var(--muted); font-size: 14px; margin-bottom: 22px; }

.notice-box{
  background: var(--chalk);
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--red);
  padding: 18px 20px;
  border-radius: 2px;
  font-size: 14.5px;
  margin: 30px 0;
}
.notice-box .voice-label{
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--red);
  display:block;
  margin-bottom: 8px;
}