/* Otonagi: still water at dusk, ink and paper.
   System fonts only and no external loads, so the site itself tracks no one. */
:root {
  --paper: #f3f0e8;
  --paper-2: #ebe6da;
  --card: #fbf9f4;
  --ink: #232d2f;
  --ink-soft: #5f6b6a;
  --line: #d8d1c2;
  --water: #4c7676;
  --accent: #b0533b; /* torii red, used sparingly */
  --todo: #f2e0a0;
  --night-1: #0b1215;
  --night-2: #16222a;
  --night-3: #2a3c45;
  --moon: #e9e4d6;
  --serif: "Hiragino Mincho ProN", "Yu Mincho", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Segoe UI", Roboto, sans-serif;
  --radius: 22px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #10171a;
    --paper-2: #141d21;
    --card: #182227;
    --ink: #e7e2d6;
    --ink-soft: #9ba7a5;
    --line: #26323a;
    --water: #8db7b3;
    --accent: #d47a62;
    --todo: #5b4a1b;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.75 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--water); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 680px; }

/* ---------- Header ---------- */
header.site {
  position: absolute; inset: 0 0 auto 0; z-index: 5;
  color: var(--moon);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 6px 20px; padding-top: 20px; padding-bottom: 20px;
}
.brand {
  font-family: var(--serif); font-size: 20px; letter-spacing: 0.22em;
  color: inherit; text-decoration: none;
}
.brand span { opacity: 0.55; font-size: 14px; letter-spacing: 0.1em; margin-left: 8px; }
nav a {
  color: inherit; opacity: 0.72; text-decoration: none; font-size: 14px;
  letter-spacing: 0.12em; text-transform: uppercase; margin-left: 22px;
}
nav a:first-child { margin-left: 0; }
nav a:hover { opacity: 1; color: inherit; }
nav a[aria-current="page"] { opacity: 1; border-bottom: 1px solid var(--accent); padding-bottom: 2px; }

/* ---------- Night scenes (hero and page banners) ---------- */
.night {
  position: relative; overflow: hidden; color: var(--moon);
  background:
    radial-gradient(ellipse 70% 55% at 50% 62%, var(--night-3) 0%, transparent 70%),
    linear-gradient(180deg, var(--night-1) 0%, var(--night-2) 58%, #0e171b 100%);
}
.hero { min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; }
.hero-text {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 120px 24px 24px;
}
.hero h1 {
  font-family: var(--serif); font-weight: 400; margin: 0;
  font-size: clamp(46px, 11vw, 88px); letter-spacing: 0.28em; margin-right: -0.28em;
  line-height: 1.1;
}
.hero .tagline {
  font-family: var(--serif); font-style: italic; opacity: 0.7;
  font-size: clamp(17px, 3.6vw, 21px); margin: 14px 0 0;
}
.hero .kanji {
  font-family: var(--serif); font-size: 15px; letter-spacing: 0.6em; margin-right: -0.6em;
  opacity: 0.5; margin-top: 26px;
}
.pill {
  display: inline-block; margin-top: 40px; padding: 11px 26px;
  border: 1px solid rgba(233, 228, 214, 0.35); border-radius: 999px;
  color: var(--moon); text-decoration: none; font-size: 14px; letter-spacing: 0.14em;
  text-transform: uppercase; background: rgba(233, 228, 214, 0.04);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.scene { display: block; width: 100%; height: auto; }
.scene .sil { fill: #070c0e; }
.scene .refl { fill: #070c0e; opacity: 0.5; }
.scene .shimmer { stroke: #2b3c44; stroke-width: 2; }
.scene .glow { fill: #c9d6d6; opacity: 0.04; }

/* Slow ripples drifting on the water */
.ripples ellipse { fill: none; stroke: #9fb6b6; stroke-width: 1; opacity: 0; transform-origin: center; transform-box: fill-box; animation: ripple 9s ease-out infinite; }
.ripples ellipse:nth-child(2) { animation-delay: 3s; }
.ripples ellipse:nth-child(3) { animation-delay: 6s; }
@keyframes ripple {
  0% { transform: scale(0.2); opacity: 0; }
  15% { opacity: 0.45; }
  100% { transform: scale(1.6); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ripples ellipse { animation: none; opacity: 0.2; }
  html { scroll-behavior: auto; }
}

/* ---------- Sections ---------- */
section.block { padding: 96px 0; }
.eyebrow {
  font-size: 13px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--ink-soft);
  margin: 0 0 14px; text-align: center;
}
h2 {
  font-family: var(--serif); font-weight: 400; font-size: clamp(28px, 5vw, 40px);
  line-height: 1.25; margin: 0 0 18px; text-align: center; letter-spacing: 0.02em;
}
.lead {
  font-family: var(--serif); font-size: clamp(19px, 3.4vw, 23px); line-height: 1.7;
  text-align: center; color: var(--ink); max-width: 640px; margin: 0 auto;
}
.center { text-align: center; }
.muted { color: var(--ink-soft); }

.enso { display: block; width: 54px; height: 54px; margin: 0 auto 30px; color: var(--ink-soft); opacity: 0.6; }

/* Mood cards: tap to turn over */
.moods {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin: 48px auto 0; max-width: 820px;
}
.flip {
  position: relative; display: block; width: 100%; aspect-ratio: 325 / 477; padding: 0; border: 0;
  background: none; color: inherit; font: inherit; text-align: center; cursor: pointer;
  perspective: 1200px; -webkit-tap-highlight-color: transparent; border-radius: 18px;
}
.flip .face {
  position: absolute; inset: 0; display: block; overflow: hidden; border-radius: 18px;
  -webkit-backface-visibility: hidden; backface-visibility: hidden;
  transition: transform 0.7s cubic-bezier(0.45, 0.05, 0.25, 1);
  box-shadow: 0 22px 44px -24px rgba(10, 20, 24, 0.6);
}
.flip .front { transform: rotateY(0deg); }
.flip .back {
  transform: rotateY(180deg);
  background: var(--card); border: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 22px 20px;
}
.flip[aria-pressed="true"] .front { transform: rotateY(-180deg); }
.flip[aria-pressed="true"] .back { transform: rotateY(0deg); }
.flip:hover .front { transform: rotateY(-6deg); }
.flip[aria-pressed="true"]:hover .front { transform: rotateY(-180deg); }
.flip:focus-visible { outline: 2px solid var(--water); outline-offset: 4px; }
.flip img { width: 100%; height: 100%; object-fit: cover; display: block; }
.back .k { font-family: var(--serif); font-size: 34px; line-height: 1; color: var(--water); }
.back .n { font-family: var(--serif); font-size: 21px; letter-spacing: 0.24em; text-transform: uppercase; margin-top: 14px; }
.back .m { font-family: var(--serif); font-style: italic; color: var(--ink-soft); font-size: 15px; margin-top: 2px; }
.back .d { font-size: 15px; line-height: 1.6; color: var(--ink); margin-top: 16px; }
.back .tag {
  margin-top: 18px; font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--ink-soft);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px;
}
.more .front img { filter: blur(7px) saturate(0.9); transform: scale(1.12); }
.more .plus {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #f3f0e8; background: rgba(20, 16, 10, 0.22); font-size: 14px; letter-spacing: 0.14em; text-transform: lowercase;
}
.more .plus .big { font-family: var(--serif); font-size: 54px; letter-spacing: 0.02em; line-height: 1.1; }
.more .list { display: block; margin-top: 14px; text-align: left; }
.more .list span { display: block; font-size: 14px; line-height: 1.45; color: var(--ink-soft); margin: 0 0 8px; }
.more .list b { color: var(--ink); font-weight: 600; }
.moods-note { text-align: center; color: var(--ink-soft); font-size: 15px; margin-top: 28px; }
@media (prefers-reduced-motion: reduce) {
  .flip .face { transition: none; }
  .flip:hover .front { transform: none; }
}

/* Features */
.alt { background: var(--paper-2); }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; }
.feature {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px 26px;
}
.feature .glyph {
  font-family: var(--serif); font-size: 34px; line-height: 1; color: var(--water); display: block; margin-bottom: 18px;
}
.feature h3 { font-family: var(--serif); font-weight: 400; font-size: 21px; margin: 0 0 6px; }
.feature p { margin: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.65; }

/* Phones */
.phones { display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px; margin-top: 56px; align-items: start; }
.phone { margin: 0; text-align: center; }
.phone .frame {
  border-radius: 38px; padding: 9px; background: #0b1012;
  box-shadow: 0 30px 60px -30px rgba(10, 20, 24, 0.7), inset 0 0 0 1px #2a3338;
  max-width: 280px; margin: 0 auto;
}
.phone .frame img { border-radius: 30px; width: 100%; height: auto; aspect-ratio: 600 / 1235; object-fit: cover; }
.phone figcaption { margin-top: 20px; font-family: var(--serif); font-size: 18px; }
.phone figcaption span { display: block; font-family: var(--sans); font-size: 15px; color: var(--ink-soft); margin-top: 2px; }

/* Pricing */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 760px; margin: 48px auto 0; }
.plan {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 30px;
}
.plan.plus { border-color: var(--water); }
.plan h3 { font-family: var(--serif); font-weight: 400; font-size: 24px; margin: 0; }
.plan .price { font-family: var(--serif); font-size: 18px; color: var(--ink-soft); margin: 4px 0 18px; }
.plan ul { margin: 0; padding: 0; list-style: none; }
.plan li { padding: 9px 0; border-top: 1px solid var(--line); font-size: 16px; }

/* Closing scene */
.closing { text-align: center; padding: 110px 24px 0; }
.closing p { font-family: var(--serif); font-size: clamp(22px, 4.4vw, 30px); margin: 0; letter-spacing: 0.04em; }
.closing .muted { color: var(--moon); opacity: 0.6; font-size: 16px; font-family: var(--sans); margin-top: 10px; letter-spacing: 0.02em; }

/* ---------- Legal and support pages ---------- */
.banner { padding: 130px 24px 0; text-align: center; }
.banner h1 {
  font-family: var(--serif); font-weight: 400; font-size: clamp(34px, 7vw, 52px);
  letter-spacing: 0.06em; margin: 0;
}
.banner .kanji { font-family: var(--serif); letter-spacing: 0.5em; margin-right: -0.5em; opacity: 0.5; font-size: 15px; margin: 10px 0 0; }
.banner .scene { margin-top: 26px; }

.doc { padding: 56px 0 96px; }
.doc .updated { color: var(--ink-soft); font-size: 14px; text-align: center; margin: 0 0 36px; letter-spacing: 0.04em; }
.doc h2 { text-align: left; font-size: 25px; margin: 52px 0 10px; }
.doc h2::before {
  content: ""; display: block; width: 28px; height: 1px; background: var(--accent); margin-bottom: 18px;
}
.doc h3 { font-family: var(--serif); font-weight: 400; font-size: 20px; margin: 30px 0 4px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.summary {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px; margin: 0 0 12px;
}
.summary p { margin: 6px 0; }
.summary strong { font-family: var(--serif); font-weight: 400; font-size: 19px; }

details.faq { border-top: 1px solid var(--line); padding: 4px 0; }
details.faq:last-of-type { border-bottom: 1px solid var(--line); }
details.faq summary {
  cursor: pointer; list-style: none; font-family: var(--serif); font-size: 19px; padding: 16px 32px 16px 0; position: relative;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 13px; font-family: var(--sans); font-weight: 300; font-size: 24px; color: var(--ink-soft);
  transition: transform 0.3s ease;
}
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq p { margin: 0 0 18px; color: var(--ink-soft); }

/* Placeholders to fill in before publishing */
.todo { background: var(--todo); padding: 0 4px; border-radius: 3px; }

/* ---------- Footer ---------- */
footer.site { background: #0b1215; color: #9aa7a7; padding: 36px 0 44px; text-align: center; }
footer.site .brand { color: var(--moon); font-size: 17px; display: inline-block; margin-bottom: 10px; }
footer.site p { margin: 4px 0; font-size: 14px; }
footer.site a { color: #c2ccca; text-decoration: none; margin: 0 10px; }
footer.site a:hover { color: #fff; }
footer.site .social { display: flex; justify-content: center; gap: 6px; margin: 2px 0 10px; }
footer.site .social a { display: inline-grid; place-items: center; width: 38px; height: 38px; margin: 0; border-radius: 50%; }
footer.site .social a:hover { background: rgba(255,255,255,.08); }
footer.site .fine { opacity: 0.6; font-size: 12px; margin-top: 14px; }

/* ---------- Small screens ---------- */
@media (max-width: 860px) {
  .moods { gap: 16px; }
  .back .d { font-size: 14px; }
  .features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  section.block { padding: 72px 0; }
  nav a { margin-left: 16px; font-size: 12px; }
  .brand { font-size: 17px; }
  .features, .plans { grid-template-columns: 1fr; }
  .phones { grid-template-columns: 1fr; gap: 44px; }
  .phone .frame { max-width: 250px; }
  .moods { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .flip .back { padding: 10px 10px; }
  .back .k { font-size: 22px; }
  .back .n { font-size: 15px; margin-top: 6px; letter-spacing: 0.18em; }
  .back .m { font-size: 13px; }
  .back .d { font-size: 12px; line-height: 1.4; margin-top: 6px; }
  .back .tag { display: none; }
  .more .n { font-size: 13px; margin-top: 0; }
  .more .list { margin-top: 6px; }
  .more .list span { font-size: 11px; line-height: 1.28; margin-bottom: 4px; }
}

/* The scene keeps the torii large on narrow screens by cropping the sides */
.hero .scene { height: clamp(240px, 38vw, 440px); }
.banner .scene { height: clamp(120px, 20vw, 190px); }
.closing .scene { height: clamp(200px, 30vw, 340px); margin-top: 40px; }
@media (max-width: 640px) {
  .pill { font-size: 12px; letter-spacing: 0.1em; padding: 10px 20px; white-space: nowrap; }
}

/* Safari: keep grid items at their natural height so pictures are never stretched */
.moods, .phones, .features, .plans { align-items: start; }
.flip, .phone { align-self: start; min-width: 0; }