@charset "utf-8";

/* ===== tokens ===== */
:root {
  --paper: #fdfbf6;
  --surface: #ffffff;
  --surface-2: #f6f2ea;
  --ink: #1f2a2e;
  --ink-2: #3d4c51;
  --muted: #6b7a7f;
  --line: #e6ded0;
  --teal: #2b8a83;
  --teal-dark: #1e6b65;
  --teal-soft: #e6f2f0;
  --amber: #d9922b;
  --amber-soft: #fdf3e0;
  --shadow: 0 1px 2px rgba(31, 42, 46, .05), 0 8px 24px rgba(31, 42, 46, .07);
  --shadow-lg: 0 4px 12px rgba(31, 42, 46, .10), 0 24px 48px rgba(31, 42, 46, .14);
  --radius: 14px;
  --wrap: 1080px;
  --sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #12181a;
    --surface: #1a2225;
    --surface-2: #202a2d;
    --ink: #e9efee;
    --ink-2: #c6d2d1;
    --muted: #93a3a5;
    --line: #2d393c;
    --teal: #63c4bb;
    --teal-dark: #8ad7cf;
    --teal-soft: #16302e;
    --amber: #e8b25e;
    --amber-soft: #2b2418;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .3);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, .4), 0 24px 48px rgba(0, 0, 0, .5);
  }
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal-dark); }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 20px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--teal); color: #fff; padding: 10px 16px; border-radius: 8px;
  transition: top .15s;
}
.skip:focus { top: 12px; }

/* ===== header ===== */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 16px;
  min-height: 60px; flex-wrap: wrap;
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  text-decoration: none; color: inherit; margin-right: auto;
}
.brand b { font-size: 1.06rem; letter-spacing: .04em; font-weight: 700; }
.brand span { font-size: .68rem; color: var(--muted); letter-spacing: .08em; }
.nav { display: flex; gap: 4px; }
.nav a {
  text-decoration: none; color: var(--ink-2); font-size: .86rem; font-weight: 500;
  padding: 7px 12px; border-radius: 999px; white-space: nowrap;
}
.nav a:hover { background: var(--teal-soft); color: var(--teal-dark); }
.nav a[aria-current="page"] { background: var(--teal); color: #fff; }

/* スマホではヘッダーを1行に収める */
@media (max-width: 700px) {
  .site-header .wrap { min-height: 54px; gap: 8px; padding-inline: 16px; }
  .brand span { display: none; }
  .nav a { padding: 7px 10px; font-size: .82rem; }
}

/* ===== hero ===== */
.hero {
  background: linear-gradient(165deg, var(--teal) 0%, var(--teal-dark) 100%);
  color: #fff; padding: 44px 0 40px;
}
.hero-tag { font-size: .8rem; letter-spacing: .16em; opacity: .9; margin: 0 0 10px; }
.hero h1 {
  font-family: var(--serif); font-weight: 700; letter-spacing: .1em;
  font-size: clamp(2rem, 8vw, 3.1rem); line-height: 1.25; margin: 0 0 8px;
}
.hero-en {
  font-family: var(--serif); font-size: clamp(.95rem, 3.6vw, 1.3rem);
  letter-spacing: .06em; margin: 0 0 18px; opacity: .95;
}
.hero-note {
  display: inline-block; font-size: .76rem; letter-spacing: .08em;
  border: 1px solid rgba(255,255,255,.5); border-radius: 999px; padding: 5px 14px;
}

/* ===== sections ===== */
main { display: block; padding-bottom: 64px; }
.section { padding-top: 48px; }
.section-head {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  margin-bottom: 20px; padding-bottom: 12px; border-bottom: 2px solid var(--teal);
}
.section-head h2 { font-size: 1.18rem; margin: 0; letter-spacing: .04em; }
.section-head .en { font-size: .7rem; color: var(--muted); letter-spacing: .14em; text-transform: uppercase; }
.section-head .more { margin-left: auto; font-size: .82rem; text-decoration: none; font-weight: 600; }
.section-head .more:hover { text-decoration: underline; }

/* ===== issue ===== */
/* モバイル：号見出し → 紙面 → 本文 の順。デスクトップ：紙面を右カラムに固定 */
.issue-layout { display: flex; flex-direction: column; gap: 26px; }
@media (min-width: 900px) {
  .issue-layout {
    display: grid; gap: 0 36px; align-items: start;
    grid-template-columns: minmax(0, 1fr) 320px;
    grid-template-areas: "head aside" "body aside";
  }
  .issue-head { grid-area: head; }
  .issue-body { grid-area: body; }
  .issue-aside { grid-area: aside; position: sticky; top: 78px; }
}

.issue-head { margin-bottom: 0; }
.issue-kicker { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.month-badge {
  font-family: var(--serif); font-weight: 700; line-height: 1;
  font-size: 2.5rem; color: var(--teal-dark);
  border: 2px solid var(--teal); border-radius: 10px;
  padding: 6px 12px 8px; letter-spacing: -.02em; white-space: nowrap;
}
.month-badge small { font-size: .95rem; letter-spacing: .04em; }
.issue-meta { font-size: .78rem; color: var(--muted); letter-spacing: .08em; }
.issue-meta strong { display: block; font-size: .95rem; color: var(--ink); letter-spacing: .04em; }
.issue-title {
  font-size: clamp(1.28rem, 5.2vw, 1.85rem); line-height: 1.55;
  margin: 0; letter-spacing: .01em; font-weight: 700;
}
.issue-lead {
  margin: 18px 0 0; color: var(--ink-2); font-size: 1rem;
  border-left: 3px solid var(--teal-soft); padding-left: 16px;
}

.prose h3 {
  font-size: 1.05rem; margin: 34px 0 10px; letter-spacing: .02em;
  padding-left: 14px; border-left: 4px solid var(--teal); line-height: 1.6;
}
.prose p { margin: 0 0 12px; }

.tip {
  margin: 32px 0; background: var(--amber-soft);
  border: 1px solid color-mix(in srgb, var(--amber) 35%, transparent);
  border-radius: var(--radius); padding: 20px 20px 18px;
}
.tip h3 {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 1.06rem; margin: 0 0 12px; padding: 0; border: 0; line-height: 1.55;
}
.tip h3::before { content: "💡"; font-size: 1.15rem; line-height: 1.5; }
.tip p { margin: 0 0 10px; }
.tip .steps-head { font-weight: 700; margin: 14px 0 6px; font-size: .95rem; }
.tip ol, .tip ul { margin: 0; padding-left: 1.35em; }
.tip li { margin-bottom: 6px; }
.tip .after { margin: 12px 0 0; color: var(--ink-2); font-size: .95rem; }

.voice-message {
  margin: 32px 0; padding: 22px 24px; border-radius: var(--radius);
  background: var(--teal-soft); border: 1px dashed var(--teal);
  text-align: center;
}
.voice-message .label {
  display: block; font-size: .7rem; letter-spacing: .18em;
  color: var(--teal-dark); margin-bottom: 8px; font-weight: 700;
}
.voice-message q {
  font-family: var(--serif); font-size: clamp(1.02rem, 4.2vw, 1.28rem);
  line-height: 1.8; quotes: "「" "」";
}

/* ===== information cards ===== */
.info-list { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.info-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px 18px 16px; box-shadow: var(--shadow);
}
.info-card h4 { margin: 0 0 8px; font-size: 1rem; line-height: 1.6; letter-spacing: .01em; }
.info-theme {
  margin: 0 0 10px; font-size: .93rem; color: var(--teal-dark); font-weight: 600; line-height: 1.7;
}
.info-meta { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 10px; }
.info-meta span {
  font-size: .78rem; background: var(--surface-2); color: var(--ink-2);
  border-radius: 999px; padding: 4px 11px; line-height: 1.6;
}
.info-card p { margin: 0 0 10px; font-size: .93rem; color: var(--ink-2); }
.info-card p:last-child { margin-bottom: 0; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--teal); color: #fff; text-decoration: none;
  font-size: .88rem; font-weight: 700; letter-spacing: .04em;
  padding: 10px 18px; border-radius: 999px; margin-top: 4px;
  min-height: 44px; box-sizing: border-box;
}
.btn::after { content: "→"; }
.btn:hover { background: var(--teal-dark); }
.btn:focus-visible, a:focus-visible, button:focus-visible {
  outline: 3px solid var(--amber); outline-offset: 2px;
}

.activities { margin: 0; padding: 0; list-style: none; }
.activities li {
  position: relative; padding-left: 20px; margin-bottom: 8px; font-size: .95rem; color: var(--ink-2);
}
.activities li::before {
  content: ""; position: absolute; left: 4px; top: .78em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--teal);
}

/* ===== paper (紙面) ===== */
.paper-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow);
}
.paper-card .paper-btn {
  display: block; width: 100%; padding: 0; border: 0; background: none;
  cursor: zoom-in; border-radius: 8px; overflow: hidden;
}
.paper-card img { border: 1px solid var(--line); border-radius: 6px; width: 100%; }
.paper-info { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; margin-top: 12px; }
.paper-cap { margin: 0; font-size: .78rem; color: var(--muted); }
.btn-paper {
  background: var(--surface); color: var(--teal-dark);
  border: 1.5px solid var(--teal); font-size: .85rem;
  padding: 9px 16px; cursor: pointer; font-family: inherit;
}
.btn-paper::after { content: none; }
.btn-paper:hover { background: var(--teal-soft); }

/* スマホでは紙面を横並びの小カードにして、本文の邪魔をしない */
@media (max-width: 640px) {
  .paper-card { display: flex; gap: 14px; align-items: flex-start; }
  .paper-card .paper-btn { width: 108px; flex: 0 0 108px; }
  .paper-info { margin-top: 2px; }
  .paper-cap { font-size: .82rem; color: var(--ink-2); font-weight: 700; }
}
.link-quiet {
  font-size: .8rem; color: var(--muted); text-decoration: none;
  border-bottom: 1px solid var(--line); padding-bottom: 1px;
}
.link-quiet:hover { color: var(--teal-dark); border-color: var(--teal); }

/* ===== backnumbers ===== */
.year-head {
  font-size: .8rem; letter-spacing: .18em; color: var(--muted);
  margin: 28px 0 12px; font-weight: 700;
}
.bn-grid {
  display: grid; gap: 16px; list-style: none; margin: 0; padding: 0;
  grid-template-columns: repeat(auto-fill, minmax(148px, 232px));
  justify-content: start;
}
@media (max-width: 400px) {
  .bn-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
}
.bn-card {
  display: flex; flex-direction: column; height: 100%;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  text-decoration: none; color: inherit; box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}
.bn-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.bn-thumb { position: relative; background: var(--surface-2); }
.bn-thumb img { width: 100%; aspect-ratio: 1414 / 2000; object-fit: cover; object-position: top center; }
.bn-thumb .tag {
  position: absolute; left: 8px; top: 8px;
  background: var(--teal); color: #fff; font-size: .68rem; font-weight: 700;
  letter-spacing: .08em; padding: 3px 9px; border-radius: 999px;
}
.bn-body { padding: 12px 13px 14px; display: flex; flex-direction: column; gap: 5px; }
.bn-issue { font-size: .93rem; font-weight: 700; letter-spacing: .04em; }
.bn-issue .y { color: var(--muted); font-weight: 500; font-size: .76rem; }
.bn-title {
  font-size: .8rem; color: var(--muted); line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

/* ===== issue pager ===== */
.pager { display: flex; gap: 12px; margin-top: 44px; flex-wrap: wrap; }
.pager a {
  flex: 1 1 200px; text-decoration: none; color: inherit;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); padding: 14px 16px; box-shadow: var(--shadow);
}
.pager a:hover { border-color: var(--teal); }
.pager .dir { display: block; font-size: .7rem; letter-spacing: .14em; color: var(--muted); margin-bottom: 4px; }
.pager .ttl { font-size: .92rem; font-weight: 700; }
.pager .next { text-align: right; }

/* ===== footer ===== */
.site-footer {
  border-top: 1px solid var(--line); background: var(--surface-2);
  padding: 30px 0 40px; font-size: .82rem; color: var(--muted);
}
.site-footer .wrap { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.site-footer a { color: var(--muted); }
.site-footer .copy { margin-left: auto; }

/* ===== lightbox ===== */
.lightbox {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(9, 13, 15, .985);
  display: none; flex-direction: column;
}
.lightbox[open], .lightbox.is-open { display: flex; }
.lb-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; color: #fff; flex-wrap: nowrap;
  border-bottom: 1px solid rgba(255,255,255,.15);
}
.lb-bar .lb-title {
  font-size: .85rem; font-weight: 700; letter-spacing: .06em;
  margin-right: auto; min-width: 0; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}
.lb-bar .lb-btn { flex: 0 0 auto; }
.lb-close { padding: 8px 14px; font-size: .95rem; line-height: 1; }
.lb-btn {
  appearance: none; background: rgba(255,255,255,.12); color: #fff;
  border: 1px solid rgba(255,255,255,.28); border-radius: 999px;
  font: inherit; font-size: .8rem; font-weight: 700;
  padding: 8px 15px; cursor: pointer; min-height: 40px;
}
.lb-btn:hover { background: rgba(255,255,255,.22); }
.lb-stage {
  flex: 1; overflow: auto; -webkit-overflow-scrolling: touch;
  touch-action: pinch-zoom; padding: 14px; display: block;
}
.lb-stage img {
  margin: 0 auto; max-width: 100%; background: #fff;
  box-shadow: 0 10px 40px rgba(0,0,0,.5);
}
.lb-stage.is-zoomed { cursor: zoom-out; }
.lb-stage.is-zoomed img { max-width: none; width: auto; }
.lb-help {
  color: rgba(255,255,255,.72); font-size: .74rem; line-height: 1.7;
  text-align: center; padding: 8px 14px 14px; margin: 0;
}
.lb-open { color: #fff; font-weight: 700; white-space: nowrap; }
body.lb-locked { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bn-card { transition: none; }
}