/* Tamotsu public website. Brand: Forest #1B5E4B (text green), Leaf
   #4CAF7A (graphics only), Slate #1F2937, Mist #E5EBF0, Sand #F8F7F4,
   Sky #2E6FDE (focus). Large type and high contrast for older readers. */

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/InterVariable.woff2") format("woff2");
}

:root {
  --forest: #1B5E4B;
  --forest-dark: #144636;
  --leaf: #4CAF7A;
  --slate: #1F2937;
  --muted: #4B5563;
  --mist: #E5EBF0;
  --sand: #F8F7F4;
  --sky: #2E6FDE;
  --tint: #E8F1EC;
  --overlay: 16, 38, 32;
  --radius: 16px;
  font-size: 112.5%; /* 18px, follows the reader's own setting */
}

* { box-sizing: border-box; }

html { background: #10261F; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.55;
  color: var(--slate);
  position: relative;
  isolation: isolate;
}

/* Full-page background photograph. A fixed layer rather than
   background-attachment: fixed, which iOS ignores. Each page picks its
   photo with a body class; the overlay keeps white text above 4.5:1
   contrast everywhere on it (re-measure if a photo changes).

   Home:  hands holding a seedling (people look out for people)
   About: moss garden with a young maple (the Japanese name)
   Other pages use the home photo. */
body {
  --bg-wide: image-set(url("/assets/img/hands-1536.webp") type("image/webp"), url("/assets/img/hands-1536.jpg") type("image/jpeg"));
  --bg-mid: image-set(url("/assets/img/hands-1024.webp") type("image/webp"), url("/assets/img/hands-1024.jpg") type("image/jpeg"));
  --bg-tall: image-set(url("/assets/img/hands-portrait-900.webp") type("image/webp"), url("/assets/img/hands-portrait-900.jpg") type("image/jpeg"));
  --bg-tall-s: image-set(url("/assets/img/hands-portrait-600.webp") type("image/webp"), url("/assets/img/hands-portrait-600.jpg") type("image/jpeg"));
  --bg-pos: 75% 55%;
  --bg-pos-tall: 50% 60%;
  --shade-top: .82; --shade-mid: .64; --shade-bottom: .76;
}
body.page-about {
  --bg-wide: image-set(url("/assets/img/moss-1536.webp") type("image/webp"), url("/assets/img/moss-1536.jpg") type("image/jpeg"));
  --bg-mid: image-set(url("/assets/img/moss-1024.webp") type("image/webp"), url("/assets/img/moss-1024.jpg") type("image/jpeg"));
  --bg-tall: image-set(url("/assets/img/moss-portrait-900.webp") type("image/webp"), url("/assets/img/moss-portrait-900.jpg") type("image/jpeg"));
  --bg-tall-s: image-set(url("/assets/img/moss-portrait-600.webp") type("image/webp"), url("/assets/img/moss-portrait-600.jpg") type("image/jpeg"));
  --bg-pos: 70% 60%;
  --bg-pos-tall: 50% 65%;
  --shade-top: .78; --shade-mid: .58; --shade-bottom: .72;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-color: #10261F;
  background-image:
    linear-gradient(180deg, rgba(var(--overlay), var(--shade-top)) 0%, rgba(var(--overlay), var(--shade-mid)) 40%, rgba(var(--overlay), var(--shade-bottom)) 100%),
    var(--bg-wide);
  background-size: cover;
  background-position: var(--bg-pos);
  background-repeat: no-repeat;
}
@media (max-width: 1100px) {
  body::before {
    background-image:
      linear-gradient(180deg, rgba(var(--overlay), var(--shade-top)) 0%, rgba(var(--overlay), var(--shade-mid)) 40%, rgba(var(--overlay), var(--shade-bottom)) 100%),
      var(--bg-mid);
  }
}
/* Phones and portrait tablets: a portrait crop that keeps the subject. */
@media (orientation: portrait) and (max-width: 900px) {
  body::before {
    background-image:
      linear-gradient(180deg, rgba(var(--overlay), var(--shade-top)) 0%, rgba(var(--overlay), var(--shade-mid)) 45%, rgba(var(--overlay), var(--shade-bottom)) 100%),
      var(--bg-tall);
    background-position: var(--bg-pos-tall);
  }
}
@media (orientation: portrait) and (max-width: 480px) {
  body::before {
    background-image:
      linear-gradient(180deg, rgba(var(--overlay), var(--shade-top)) 0%, rgba(var(--overlay), var(--shade-mid)) 45%, rgba(var(--overlay), var(--shade-bottom)) 100%),
      var(--bg-tall-s);
  }
}

a { color: var(--forest); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: -999px; top: 0; }
.skip:focus { left: 1rem; top: 1rem; z-index: 10; background: #fff; color: var(--slate); padding: .5rem .75rem; }

/* ---- Header ---- */
.site-header {
  max-width: 72rem; margin: 0 auto; padding: 1.25rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.logo img { display: block; height: 48px; width: auto; }
.site-header nav { display: flex; gap: .25rem 1.25rem; flex-wrap: wrap; }
.site-header nav a {
  color: #fff; text-decoration: none; font-weight: 500; padding: .5rem .25rem;
  border-bottom: 2px solid transparent;
}
.site-header nav a:hover, .site-header nav a[aria-current] { border-bottom-color: var(--leaf); }

main { max-width: 72rem; margin: 0 auto; padding: 0 1.5rem 3rem; }

/* ---- Hero (text straight on the photo) ---- */
.hero { color: #fff; padding: clamp(2.5rem, 9vh, 7rem) 0 clamp(3rem, 12vh, 8rem); max-width: 44rem; }
.hero-mark { display: block; width: 96px; height: auto; margin-bottom: 1.25rem;
  background: rgba(255,255,255,.94); border-radius: 22px; padding: 12px; }
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem); line-height: 1.08; letter-spacing: -.02em;
  margin: 0 0 1rem; font-weight: 700; text-wrap: balance;
}
.hero-lead { font-size: clamp(1.2rem, 2.6vw, 1.6rem); font-weight: 600; color: #D7EEE2; margin: 0 0 1.25rem; }
.hero-body { font-size: 1.1rem; max-width: 38rem; margin: 0 0 2rem; color: #F1F5F3; }
.hero-actions, .hub-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin: 0; }
.hero, .hero a { text-shadow: 0 1px 2px rgba(0,0,0,.25); }
.hero .button { text-shadow: none; }

/* ---- Buttons ---- */
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: .7rem 1.4rem; border-radius: 10px;
  font: inherit; font-weight: 600; text-decoration: none; text-shadow: none;
  border: 2px solid transparent; cursor: pointer;
}
.button.primary { background: var(--forest); color: #fff; border-color: var(--forest); }
.button.primary:hover { background: var(--forest-dark); border-color: var(--forest-dark); }
.hero .button.primary { background: #fff; color: var(--forest); border-color: #fff; }
.hero .button.primary:hover { background: var(--tint); }
.button.ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.85); }
.button.ghost:hover { background: rgba(255,255,255,.12); }
.button.secondary { background: #fff; color: var(--forest); border-color: var(--forest); }
.button.secondary:hover { background: var(--tint); }

/* ---- Panels (white cards over the photo) ---- */
.panel {
  background: #fff;
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 3rem);
  margin: 0 0 1.5rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
}
.panel-first { margin-top: 2rem; }
.panel h1 { font-size: 2.2rem; margin: 0 0 1rem; letter-spacing: -.01em; }
.panel h2 { font-size: clamp(1.6rem, 3.5vw, 2.1rem); line-height: 1.2; margin: 0 0 1.25rem; letter-spacing: -.01em; }
.panel h3 { font-size: 1.15rem; margin: 0 0 .35rem; }
.panel p { max-width: 46rem; }
.panel-hubs { border-top: 8px solid var(--forest); }

.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.steps li { display: flex; gap: 1rem; align-items: flex-start; }
.steps p { margin: 0; color: var(--muted); }
.step-n {
  flex: none; width: 2.6rem; height: 2.6rem; border-radius: 50%;
  display: grid; place-items: center; font-weight: 700;
  background: var(--tint); color: var(--forest); border: 2px solid var(--leaf);
}

.promises { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.25rem 2rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.promises li { padding-left: 1rem; border-left: 4px solid var(--leaf); }
.promises p { margin: 0; color: var(--muted); }

.ticks { padding: 0; list-style: none; margin: 0 0 1.25rem; }
.ticks li { position: relative; padding-left: 2rem; margin: 0 0 .6rem; }
.ticks li::before {
  content: ""; position: absolute; left: .2rem; top: .45em; width: .9rem; height: .5rem;
  border-left: 3px solid var(--forest); border-bottom: 3px solid var(--forest); transform: rotate(-45deg);
}

/* ---- About page ---- */
.hero-about { text-align: left; }
.kanji-hero { display: block; width: clamp(12rem, 30vw, 18rem); height: auto; margin: 0 0 1rem; opacity: .96; }
.hero-about h1 .reading { display: block; font-size: .55em; font-weight: 600; color: #D7EEE2; letter-spacing: .02em; margin-top: .35rem; }
.hero-about h1 span[lang="ja"] { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.meanings { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 1rem; margin: 1.5rem 0 0; }
.meanings div { background: var(--sand); border-radius: 12px; padding: 1rem 1.25rem; border: 1px solid var(--mist); }
.meanings dt { font-weight: 700; color: var(--forest); font-size: 1.15rem; }
.meanings dd { margin: .2rem 0 0; color: var(--muted); }

.char-explain { display: grid; grid-template-columns: auto 1fr; gap: 2rem; align-items: start; }
.char-figure { margin: 0; text-align: center; background: var(--sand); border: 1px solid var(--mist); border-radius: 16px; padding: 1rem 1.25rem .5rem; }
.char-figure img { display: block; width: 9rem; height: auto; }
.char-figure figcaption { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.inline-glyph { width: 1.4em; height: 1.4em; vertical-align: -.35em; }
@media (max-width: 40rem) { .char-explain { grid-template-columns: 1fr; } .char-figure { justify-self: start; } }

.footer-line-inline { font-size: 1.3rem; font-weight: 600; color: var(--forest); }

/* ---- Footer ---- */
.site-footer { background: rgba(16, 38, 32, .92); color: #E3ECE8; }
.footer-inner { max-width: 72rem; margin: 0 auto; padding: 2.5rem 1.5rem; font-size: .95rem; }
.footer-inner p { max-width: 50rem; }
.footer-line { font-size: 1.3rem; font-weight: 600; color: #fff; margin-top: 0; }
.site-footer a { color: #fff; }
.site-footer strong { color: #fff; }
.legal { color: #C3D2CB; font-size: .88rem; }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }

@media (max-width: 34rem) {
  .site-header { padding: 1rem; row-gap: .5rem; }
  .logo img { height: 40px; }
  .site-header nav { gap: 0 1rem; font-size: .95rem; }
  .site-header nav a { padding: .35rem 0; }
  .hero { padding-top: 1.5rem; }
  .hero-mark { width: 72px; border-radius: 18px; padding: 9px; }
  main { padding: 0 1rem 2rem; }
  .hero-actions .button, .hub-actions .button { width: 100%; }
}