/* S05 AI作詞作曲。背景・本文・補助・境界は依頼者の確定値。オレンジは共通マスターの提案値。 */

:root {
  --color-bg: #faf8f3;
  --color-paper: #f7f2e8;
  --color-ink: #203632;
  --color-muted: #3e5550;
  --color-line: #e4ddd2;
  --color-form: #8a847b;
  --color-stroke: #3a3631;
  --color-accent: #a84d22;
  --color-accent-deep: #8e3f1a;
  --color-accent-soft: #faebdd;
  --color-on-accent: #fff;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-en: "Cormorant Garamond", Palatino, "Palatino Linotype", serif;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 120px;
  --max: 1120px;
  --read: 720px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.03em;
}
img, svg, audio, video { max-width: 100%; }
img { height: auto; display: block; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
h2, h3 { word-break: auto-phrase; }
h1 { word-break: normal; }
a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:visited { color: var(--color-accent); }
a:hover { color: var(--color-accent-deep); }
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
::selection { background: var(--color-accent-soft); }

.skip {
  position: absolute;
  left: var(--space-2);
  top: -48px;
  background: var(--color-ink);
  color: var(--color-on-accent);
  padding: var(--space-1) var(--space-2);
  z-index: 40;
}
.skip:focus { top: var(--space-1); }

.preview-bar {
  margin: 0;
  padding: var(--space-1) 20px;
  background: var(--color-paper);
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
  text-align: center;
  border-bottom: 1px solid var(--color-line);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(250, 248, 243, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}
.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.logo { text-decoration: none; color: var(--color-ink); min-width: 0; }
.logo:hover { color: var(--color-ink); }
.logo-ja {
  display: block;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.3;
}
.logo-en {
  display: block;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.3;
  color: var(--color-muted);
}
.menu-btn {
  margin-left: auto;
  min-height: 48px;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--color-accent);
  background: transparent;
  color: var(--color-ink);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}
.menu-btn:hover { background: var(--color-accent-soft); }

.nav { display: none; }
.nav.is-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  padding: var(--space-1) 20px var(--space-2);
}
.nav a {
  color: var(--color-ink);
  text-decoration: none;
  min-height: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6px 0;
  font-weight: 500;
}
.nav a:visited { color: var(--color-ink); }
.nav a [lang="en"] {
  font-weight: 400;
  font-size: 14px;
  line-height: 1.4;
  color: var(--color-muted);
}
.nav a[aria-current="page"] { color: var(--color-accent); }
.nav a:hover { color: var(--color-accent); }

@media (min-width: 960px) {
  .menu-btn { display: none; }
  .nav,
  .nav.is-open {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
    margin-left: auto;
    position: static;
    padding: 0;
    border: 0;
    background: transparent;
  }
  .nav a { min-height: 44px; padding: 0; }
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}
.narrow { max-width: var(--read); }
.narrow ul { margin: 0 0 1em; padding-left: 1.2em; }
.narrow li + li { margin-top: 0.35em; }

.hero { padding: var(--space-5) 0 var(--space-4); }
@media (min-width: 960px) {
  .hero { padding: var(--space-7) 0 var(--space-6); }
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-4); align-items: center; }
.hero-copy, .hero-art { min-width: 0; max-width: 100%; }
@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
    column-gap: var(--space-6);
    align-items: center;
  }
}
.kicker {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.4;
  color: var(--color-muted);
}
.kicker::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--color-accent);
  flex: none;
}
h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(30px, 4.2vw + 14px, 60px);
  line-height: 1.4;
  letter-spacing: 0.06em;
}
h2 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 2vw + 17px, 40px);
  line-height: 1.5;
  letter-spacing: 0.04em;
}
h3 {
  margin: 0 0 var(--space-1);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.5;
}
.pair-en {
  margin: var(--space-1) 0 0;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--color-muted);
}
h1 + .pair-en { font-size: 16px; margin-top: var(--space-2); }
.lede { margin: var(--space-3) 0 0; max-width: 38em; }
.hero .pair-en + .lede { margin-top: var(--space-3); }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
@media (max-width: 640px) {
  .actions { flex-direction: column; align-items: stretch; }
  .actions .btn { width: 100%; }
}
.btn {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 48px;
  padding: 8px 18px;
  border-radius: 6px;
  font: inherit;
  font-weight: 500;
  line-height: 1.35;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 200ms ease;
}
.btn [lang="en"] {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.02em;
}
.btn-primary {
  background: var(--color-accent);
  border: 1px solid var(--color-accent);
  color: var(--color-on-accent);
}
.btn-primary:visited,
.btn-primary:hover { color: var(--color-on-accent); }
.btn-primary:hover { background: var(--color-accent-deep); border-color: var(--color-accent-deep); }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-ink);
}
.btn-ghost:visited { color: var(--color-ink); }
.btn-ghost:hover { background: var(--color-accent-soft); color: var(--color-ink); }
.btn-ghost [lang="en"] { color: var(--color-muted); }

.hero-art svg { width: 100%; height: auto; display: block; aspect-ratio: 560 / 680; }
@media (prefers-reduced-motion: no-preference) {
  .melody { animation: rise 280ms ease both; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.page-head { padding: var(--space-5) 0 var(--space-2); }
@media (min-width: 960px) {
  .page-head { padding: var(--space-7) 0 var(--space-3); }
}
.section { padding: 64px 0; }
@media (min-width: 960px) {
  .section { padding: 112px 0; }
}
.band { background: var(--color-paper); }
section[id] { scroll-margin-top: 120px; }

.steps { margin: var(--space-4) 0 0; max-width: 800px; }
.steps article {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-line);
}
.steps span {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-accent);
}
.note {
  margin-top: var(--space-3);
  max-width: 800px;
  padding: var(--space-3);
  background: var(--color-accent-soft);
  border-radius: 10px;
}
.note h3 { font-size: 20px; }
.mark {
  display: inline-block;
  margin: 0 0 var(--space-1);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--color-accent);
}

.facts { margin: var(--space-4) 0 0; max-width: var(--read); }
.facts div {
  display: grid;
  grid-template-columns: 8.5em minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-top: 1px solid var(--color-line);
}
.facts div:last-child { border-bottom: 1px solid var(--color-line); }
.facts dt {
  margin: 0;
  font-weight: 500;
}
.facts dd { margin: 0; }
@media (max-width: 480px) {
  .facts div { grid-template-columns: 1fr; gap: 4px; }
}

.teachers {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-4);
}
@media (min-width: 800px) {
  .teachers { grid-template-columns: 1fr 1fr; gap: var(--space-6); align-items: start; }
}
.teachers article { border-top: 1px solid var(--color-accent); padding-top: var(--space-2); }

.works { margin-top: var(--space-5); }
.work {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-line);
}
@media (min-width: 640px) {
  .work { grid-template-columns: 120px minmax(0, 1fr); gap: var(--space-3); align-items: start; }
}
.work img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  background: var(--color-paper);
}
.work audio { width: 100%; margin-top: var(--space-1); }
.source {
  margin-top: var(--space-2);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.faq { max-width: var(--read); margin-top: var(--space-3); border-bottom: 1px solid var(--color-line); }
.faq details { border-top: 1px solid var(--color-line); }
.faq summary {
  min-height: 48px;
  padding: var(--space-2) 0;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  float: right;
  color: var(--color-accent);
  font-weight: 500;
}
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 var(--space-2); }

.related { margin-top: var(--space-4); max-width: var(--read); }

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-5) 0;
}
.foot {
  display: grid;
  gap: var(--space-4);
}
@media (min-width: 800px) {
  .foot { grid-template-columns: 1.3fr 1fr; }
}
.foot-name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.06em;
  margin: 0 0 var(--space-2);
}
.foot a, .foot a:visited { color: var(--color-ink); }
.foot-nav { display: grid; gap: 4px; }
.foot-note {
  margin: var(--space-4) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

input, select, textarea {
  border: 1px solid var(--color-form);
  border-radius: 6px;
  background: #fff;
  color: var(--color-ink);
  font: inherit;
  min-height: 48px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ==== TARNAR トークン第2版レイヤー（2026-10-10 Claude適用。S00 tokens.css 第2段に合わせる） ==== */
:root {
  --read: 672px; --measure: 672px; --read-max: 672px;
  --color-paper: #f4efe6; --color-surface: #f4efe6; --color-cream: #f4efe6;
  --color-stroke: #203632;
  --radius-btn: 0; --radius-card: 0;
}
html body h1 { font-size: clamp(26px, 7vw, 46px); line-height: 1.35; letter-spacing: 0.02em; }
html body h2 { font-size: clamp(26px, 5vw, 36px); line-height: 1.35; }
html body h3 { font-size: 22px; }
.section { padding-top: 42px; padding-bottom: 42px; }
@media (min-width: 800px) { .section { padding-top: 64px; padding-bottom: 64px; } }
html body *:not(img):not(video):not(iframe) { border-radius: 0 !important; }
html body img { border-radius: 2px; }
/* 線画：色と太さ（表示px）。記事本文の中の図は対象外 */
svg:not(.entry-body svg) [stroke="#3A3631" i] { stroke: #203632; }
svg:not(.entry-body svg) [fill="#FCFBF7" i] { fill: #faf8f3; }
svg:not(.entry-body svg) [fill="#F7F2E8" i] { fill: #f4efe6; }
svg:not(.entry-body svg) :is(:is(path, line, circle, ellipse, polyline, polygon, rect)[stroke]:not([stroke="none"]), g[stroke]:not([stroke="none"]) :is(path, line, circle, ellipse, polyline, polygon, rect)) { vector-effect: non-scaling-stroke; stroke-width: 2px; }
.hero-art svg :is(:is(path, line, circle, ellipse, polyline, polygon, rect)[stroke]:not([stroke="none"]), g[stroke]:not([stroke="none"]) :is(path, line, circle, ellipse, polyline, polygon, rect)) { stroke-width: 3px; }
@media (min-width: 800px) { .hero-art svg :is(:is(path, line, circle, ellipse, polyline, polygon, rect)[stroke]:not([stroke="none"]), g[stroke]:not([stroke="none"]) :is(path, line, circle, ellipse, polyline, polygon, rect)) { stroke-width: 4px; } }
/* ==== /TARNAR トークン第2版レイヤー ==== */