/* Kasumi Takahashi — site styles (design C "Sky") */
:root {
  --sky: #A6DCF4;        /* メインの水色。ここを変えるとサイト全体の水色が変わります */
  --ink: #15324A;        /* 文字色（紺） */
  --muted: #45627A;      /* 補足の文字色 */
  --link: #17669A;
  --link-hover: #0C4A72;
  --pale: #F3FAFE;       /* うすい水色の背景 */
  --pill: #E3F4FC;
  --lilac: #F4F2FD;      /* うすい紫の背景 */
  --lilac-strong: #D6D0F6;
  --line: #DCEFF8;
  --white: #FFFFFF;
  --wrap: 1160px;
  --font: 'Outfit', 'M PLUS 1', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --font-ja: 'M PLUS 1', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.75;
}
.lang-ja { font-size: 16px; line-height: 1.85; }
img { max-width: 100%; display: block; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { color: var(--link-hover); }
:focus-visible { outline: 3px solid var(--link); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.25; }

.skip { position: absolute; left: -9999px; top: 8px; background: var(--white); padding: 8px 14px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: 24px; padding-right: 24px; }

/* ---------- header ---------- */
.sky { background: var(--sky); }
.site-header {
  max-width: var(--wrap); margin: 0 auto; padding: 22px 24px;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px;
}
.brand { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: 0.02em; margin-right: auto; }
.brand:hover { color: var(--ink); }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 22px; font-size: 15px; font-weight: 500; }
.lang-ja .nav { font-size: 14px; }
.nav > a { color: var(--ink); text-decoration: none; padding: 6px 0; }
.nav > a:hover, .nav > a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 6px; }
.lang { display: inline-flex; background: var(--white); border-radius: 999px; padding: 3px; font-size: 13px; }
.lang a { padding: 4px 12px; border-radius: 999px; color: var(--ink); text-decoration: none; min-height: 32px; display: inline-flex; align-items: center; }
.lang a[aria-current="true"] { background: var(--ink); color: var(--white); }

/* ---------- hero ---------- */
.hero {
  padding-top: 72px; padding-bottom: 120px;
  display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 40px;
}
.hero-name { flex: 1 1 520px; min-width: 0; }
.hero-lead { flex: 0 1 380px; min-width: 0; }
.kicker { margin: 0 0 12px; font-size: 15px; font-weight: 500; }
.hero h1 { margin: 0; font-weight: 700; font-size: clamp(56px, 9vw, 96px); line-height: 1; letter-spacing: -0.02em; }
.name-ja { margin: 20px 0 0; font-family: var(--font-ja); font-size: 20px; font-weight: 500; letter-spacing: 0.14em; }
.tagline { margin: 0; font-size: 19px; line-height: 1.7; }
.lang-ja .tagline { font-size: 17px; line-height: 1.95; }
.affil { margin: 16px 0 0; font-size: 15px; }

.hero-sub { display: block; padding-top: 56px; padding-bottom: 72px; }
.hero-sub h1 { font-size: clamp(44px, 7vw, 72px); }
.hero-sub .lead { margin: 16px 0 0; font-size: 17px; }
.hero-sub .lead a { color: var(--ink); }

.h-sub { font-family: var(--font-ja); font-size: 0.42em; font-weight: 500; margin-left: 10px; letter-spacing: 0.08em; vertical-align: middle; }
.hero-sub .h-sub { font-size: 0.32em; }

/* ---------- about ---------- */
.about { display: flex; flex-wrap: wrap; gap: 40px 64px; padding-bottom: 96px; }
.photo-wrap { flex: 0 0 auto; margin-top: -80px; }
.photo {
  width: 240px; height: 240px; border-radius: 50%; object-fit: cover;
  background: #EFF8FD; border: 8px solid var(--white); box-shadow: 0 0 0 2px #CBE9F7;
}
.about-body { flex: 1 1 560px; min-width: 0; padding-top: 48px; }
.pill { display: inline-block; margin: 0 0 20px; padding: 2px 16px; border-radius: 999px; background: var(--pill); font-size: 15px; font-weight: 600; letter-spacing: 0.08em; }
.about-text { margin: 0 0 28px; font-size: 18px; }
.lang-ja .about-text { font-size: 17px; }
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.chips li { padding: 8px 18px; border-radius: 16px; background: var(--lilac); font-size: 14px; line-height: 1.6; }
.chips b { font-weight: 600; margin-right: 0.8em; }
.cv-link { margin: 24px 0 0; }
.cards-more { grid-column: 1 / -1; margin: 0; text-align: right; }

/* ---------- sections ---------- */
.band { padding: 96px 0; }
.pale { background: var(--pale); }
.lilac-bg { background: var(--lilac); }
.section { padding-top: 96px; padding-bottom: 96px; }
.h-big { margin: 0 0 40px; font-size: clamp(34px, 5vw, 44px); font-weight: 700; letter-spacing: -0.01em; }
.h-mid { margin: 0 0 18px; font-size: 26px; font-weight: 700; }
.h-mid .h-sub { font-size: 15px; margin-left: 8px; }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 36px; }
.section-head .h-big { margin: 0; }
.more { font-weight: 600; font-size: 16px; }

.research { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 40px; }
.num { display: inline-flex; width: 44px; height: 44px; border-radius: 50%; background: var(--sky); align-items: center; justify-content: center; font-weight: 700; }
.num.lilac { background: var(--lilac-strong); }
.research h3 { margin: 16px 0 8px; font-size: 22px; font-weight: 600; }
.lang-ja .research h3 { font-family: var(--font-ja); font-size: 20px; font-weight: 700; }
.research p { margin: 0; font-size: 16px; }
.lang-ja .research p { font-size: 15px; }

.two-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 48px; }
.label { margin: 0 0 8px; font-size: 14px; font-weight: 600; letter-spacing: 0.12em; color: var(--muted); }
.works { list-style: none; margin: 0; padding: 0; }
.work { padding: 18px 0; border-bottom: 1px solid var(--line); }
.work-meta { margin: 0 0 4px; font-size: 13px; font-weight: 600; color: var(--link); }
.work-cite { margin: 0; font-size: 15px; line-height: 1.65; overflow-wrap: anywhere; }
.work-note { margin: 4px 0 0; font-size: 13px; color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; padding-bottom: 96px; }
.card { border-radius: 28px; padding: 40px; }
.timeline { margin: 0; display: grid; grid-template-columns: minmax(84px, max-content) 1fr; gap: 12px 16px; font-size: 15px; line-height: 1.6; }
.timeline dt { font-weight: 600; white-space: nowrap; }
.timeline dd { margin: 0; }

/* ---------- contact ---------- */
.contact { background: var(--sky); padding: 80px 0; }
.contact-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.contact-inner > div { flex: 1 1 420px; min-width: 0; }
.contact .h-big { margin: 0 0 8px; }
.contact p { margin: 0 0 4px; }
.contact a { color: var(--ink); }
.mail { font-size: 18px; font-weight: 500; }
.links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 12px !important; font-size: 15px; font-weight: 500; }
.button {
  display: inline-flex; align-items: center; min-height: 56px; padding: 0 32px; border-radius: 999px;
  background: var(--white); color: var(--ink) !important; text-decoration: none; font-weight: 700; font-size: 16px;
  box-shadow: 0 0 0 2px var(--white);
}
.button:hover { box-shadow: 0 0 0 2px var(--ink); }
.page .button { background: var(--ink); color: var(--white) !important; }

/* ---------- sub pages ---------- */
.page { padding-top: 64px; padding-bottom: 96px; }
.toc { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 56px; }
.toc a { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 18px; border-radius: 999px; background: var(--pill); color: var(--ink); text-decoration: none; font-weight: 500; font-size: 15px; }
.toc a:hover { background: var(--sky); }
.toc span { font-size: 12px; font-weight: 700; background: var(--white); border-radius: 999px; padding: 0 8px; line-height: 20px; }
.pub-section, .cv-section { margin-bottom: 64px; scroll-margin-top: 24px; }
.pub-section .works { max-width: 920px; }
.year { margin: 32px 0 0; font-size: 18px; font-weight: 700; color: var(--muted); padding-bottom: 6px; border-bottom: 2px solid var(--sky); max-width: 920px; }
.cv-section .timeline { max-width: 960px; font-size: 16px; grid-template-columns: 11em 1fr; }.plain { margin: 0; padding-left: 1.2em; }
.to-top, .cv-more { margin: 0; }

/* ---------- footer ---------- */
.site-footer {
  max-width: var(--wrap); margin: 0 auto; padding: 24px;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--muted);
}

/* ---------- small screens ---------- */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .site-header { padding: 16px 16px 8px; }
  .site-header { row-gap: 6px; }
  .nav { order: 3; width: 100%; flex-wrap: nowrap; overflow-x: auto; gap: 18px; padding-bottom: 6px; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .nav > a { white-space: nowrap; }
  .lang { order: 2; flex: 0 0 auto; }
  .wrap { padding-left: 16px; padding-right: 16px; }
  .hero { padding-top: 40px; padding-bottom: 96px; gap: 28px; }
  .hero-sub { padding-bottom: 48px; }
  .photo-wrap { margin-top: -72px; }
  .photo { width: 180px; height: 180px; }
  .about-body { padding-top: 0; }
  .band, .section { padding-top: 64px; padding-bottom: 64px; }
  .card { padding: 28px 22px; border-radius: 22px; }
  .two-col, .cards, .research { grid-template-columns: 1fr; }
  .timeline, .cv-section .timeline { grid-template-columns: 1fr; gap: 2px; }
  .timeline dd { margin-bottom: 12px; }
  .contact { padding: 56px 0; }
}