/*
  Ryokōya — ryokoya.app
  ---------------------------------------------------------------------------
  The site is a page torn out of the thing it is selling: a night sky, a route
  drawn across it, and a small creature keeping notes. Every colour below is
  lifted from DesignSystem.swift so the web and the app are the same object.

  TYPOGRAPHY, and why there is not a single webfont.
  `ui-rounded` resolves to SF Rounded on Apple platforms — literally the app's
  typeface — and `ui-serif` resolves to New York, Apple's editorial serif, which
  is exactly the guidebook voice this wants. Both cost zero requests. That is
  not only a performance nicety: the privacy page claims the site loads nothing
  from anyone else, and pulling fonts from a CDN would quietly make that untrue.
  The audience is iPhone owners, so the good case is also the common case.
*/

:root {
  /* Straight from DesignSystem.swift */
  --teal:    #26adb8;
  --coral:   #ff6b6b;
  --gold:    #ffc247;
  --purple:  #8c5ccc;
  --success: #33c78c;

  /* The share card's night canvas */
  --night-0: #0b1028;
  --night-1: #161340;
  --night-2: #241a4e;

  --ink:       #f4f2ff;
  --ink-soft:  rgba(244, 242, 255, 0.72);
  --ink-faint: rgba(244, 242, 255, 0.45);
  --rule:      rgba(244, 242, 255, 0.12);

  --display: ui-serif, "New York", Georgia, "Times New Roman", serif;
  --ui: ui-rounded, "SF Pro Rounded", -apple-system, "Segoe UI", system-ui, sans-serif;

  --measure: 68ch;
  --page: 1120px;
}

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

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

body {
  margin: 0;
  font-family: var(--ui);
  color: var(--ink);
  background: var(--night-0);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------------------------------------------------------------- atmosphere
   Three layers, none of them an image request: a vertical night gradient, two
   colour blooms borrowed from the share card, and a grain overlay generated by
   an inline SVG turbulence filter. Grain is what stops a large flat gradient
   reading as a cheap CSS backdrop. */

.sky {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 620px at 12% 4%, rgba(38, 173, 184, 0.20), transparent 62%),
    radial-gradient(760px 560px at 88% 26%, rgba(140, 92, 204, 0.22), transparent 60%),
    radial-gradient(820px 620px at 42% 82%, rgba(255, 107, 107, 0.13), transparent 62%),
    linear-gradient(178deg, var(--night-0) 0%, var(--night-1) 46%, var(--night-2) 100%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* A fixed starfield, deterministic rather than random, so the sky is the same
   sky on every visit. */
.stars { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
.stars i {
  position: absolute;
  border-radius: 50%;
  background: #fff;
  animation: twinkle 6s ease-in-out infinite;
}
@keyframes twinkle { 0%, 100% { opacity: 0.28; } 50% { opacity: 0.85; } }
@media (prefers-reduced-motion: reduce) { .stars i { animation: none; } }

/* ------------------------------------------------------------------- shell */

.wrap { width: min(100% - 2.5rem, var(--page)); margin-inline: auto; }

header.masthead {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 0.9rem 0;
  backdrop-filter: blur(14px);
  background: rgba(11, 16, 40, 0.62);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
header.masthead.stuck { border-bottom-color: var(--rule); background: rgba(11, 16, 40, 0.86); }

.masthead .wrap { display: flex; align-items: center; gap: 1.25rem; }
.masthead img { height: 30px; width: auto; display: block; }
.masthead nav { margin-left: auto; display: flex; gap: 1.5rem; align-items: center; }
.masthead nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s ease;
}
.masthead nav a:hover { color: var(--gold); }
@media (max-width: 640px) { .masthead nav a.hide-sm { display: none; } }

/* -------------------------------------------------------------------- type */

h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(2.7rem, 7.5vw, 5.1rem); line-height: 1.02; }
h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); line-height: 1.1; }
h3 { font-size: 1.16rem; font-family: var(--ui); font-weight: 700; letter-spacing: -0.01em; }

p { line-height: 1.65; margin: 0 0 1.1rem; max-width: var(--measure); }
a { color: var(--gold); }

.eyebrow {
  font-family: var(--ui);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 1rem;
}
.lede { font-size: clamp(1.06rem, 2vw, 1.24rem); color: var(--ink-soft); }
.jp { font-family: var(--ui); color: var(--teal); letter-spacing: 0.3em; font-size: 0.8rem; }

/* -------------------------------------------------------------------- hero */

.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5.5rem); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; } }

.hero h1 em {
  font-style: italic;
  color: var(--gold);
  /* The one place the display face is allowed to show off. */
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2rem; align-items: center; }

.btn {
  font-family: var(--ui);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  padding: 0.95rem 1.6rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.btn-primary {
  background: linear-gradient(120deg, var(--gold), #ffb01f);
  color: #2b1a00;
  box-shadow: 0 10px 30px rgba(255, 194, 71, 0.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(255, 194, 71, 0.38); }
.btn-ghost { color: var(--ink); border: 1px solid var(--rule); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }

.hero-note { font-size: 0.86rem; color: var(--ink-faint); margin-top: 1.4rem; }

/* Phone: tilted, not flat-on — a diary lying on a table rather than a spec sheet. */
.phone {
  position: relative;
  border-radius: 30px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.55), 0 0 0 8px rgba(255, 255, 255, 0.03);
  transform: rotate(-3deg);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  max-width: 300px;
  margin-inline: auto;
}
.phone:hover { transform: rotate(-1deg) translateY(-6px); }
.phone img { display: block; width: 100%; height: auto; }

/* ------------------------------------------------------------------- route
   The spine of the page: a dashed line drawn as you scroll, the same motif the
   app stamps on its books and share cards. */

.route { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }
.route path {
  fill: none;
  stroke: rgba(244, 242, 255, 0.30);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 1 10;
}

/* ---------------------------------------------------------------- sections */

section { position: relative; padding: clamp(3.5rem, 8vw, 6.5rem) 0; }
.section-head { max-width: 62ch; margin-bottom: clamp(2rem, 4vw, 3.2rem); }

/* Three beats, offset so the eye walks rather than scans. */
.beats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; }
@media (max-width: 820px) { .beats { grid-template-columns: 1fr; } }
.beat {
  position: relative;
  padding: 1.9rem 1.6rem 1.7rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--rule);
}
.beats .beat:nth-child(2) { transform: translateY(1.8rem); }
.beats .beat:nth-child(3) { transform: translateY(3.6rem); }
@media (max-width: 820px) { .beats .beat { transform: none !important; } }
.beat .num {
  font-family: var(--display);
  font-size: 2.6rem;
  line-height: 1;
  color: var(--gold);
  opacity: 0.5;
  display: block;
  margin-bottom: 0.7rem;
}
.beat p { font-size: 0.96rem; color: var(--ink-soft); margin-bottom: 0; }
.beat h3 { margin-bottom: 0.5rem; }

/* Feature grid */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); gap: 1.4rem; }
.card {
  padding: 1.7rem 1.5rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--rule);
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.card:hover { border-color: rgba(255, 194, 71, 0.4); transform: translateY(-3px); background: rgba(255, 255, 255, 0.06); }
.card p { font-size: 0.94rem; color: var(--ink-soft); margin-bottom: 0; }
.card h3 { margin-bottom: 0.5rem; }
.card .mark {
  width: 38px; height: 38px; border-radius: 12px;
  display: grid; place-items: center;
  margin-bottom: 1rem;
}
.card .mark svg { width: 21px; height: 21px; display: block; }

/* Split: text beside a phone */
.split { display: grid; grid-template-columns: 1fr 0.75fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.split.flip { grid-template-columns: 0.75fr 1fr; }
@media (max-width: 860px) { .split, .split.flip { grid-template-columns: 1fr; } }

/* The promise block — the app's actual differentiator, so it gets the weight */
.promise {
  border-radius: 26px;
  padding: clamp(2rem, 4.5vw, 3.2rem);
  background: linear-gradient(150deg, rgba(38, 173, 184, 0.13), rgba(140, 92, 204, 0.10));
  border: 1px solid rgba(38, 173, 184, 0.28);
}
.promise ul { list-style: none; padding: 0; margin: 1.6rem 0 0; display: grid; gap: 0.9rem; }
/* NOT display:flex. A flex li makes every child its own flex item, so a <b>
   followed by plain text becomes two columns — which fragmented these lines into
   "Your trips live on your device" | ", and" | "your" | "in". The check is
   positioned instead, and the content stays ordinary flowing text. */
.promise li {
  position: relative;
  padding-left: 1.75rem;
  color: var(--ink-soft);
  line-height: 1.55;
}
.promise li b { color: var(--ink); font-weight: 700; }
.promise li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--success);
  font-weight: 800;
}

/* Numbers */
.tally { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 2.5rem; }
@media (max-width: 700px) { .tally { grid-template-columns: repeat(2, 1fr); } }
.tally div { text-align: center; padding: 1.2rem 0.5rem; border-radius: 16px; background: rgba(255,255,255,0.035); border: 1px solid var(--rule); }
.tally b { display: block; font-family: var(--display); font-size: 2rem; line-height: 1; color: var(--gold); }
.tally span { display: block; margin-top: 0.4rem; font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); }

/* ------------------------------------------------------------------ footer */

footer {
  border-top: 1px solid var(--rule);
  padding: 3rem 0 3.5rem;
  margin-top: 2rem;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 1.6rem 2.5rem; align-items: center; }
footer img { height: 26px; opacity: 0.85; }
footer nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
footer a { color: var(--ink-soft); text-decoration: none; font-size: 0.9rem; }
footer a:hover { color: var(--gold); }
footer .legal { width: 100%; color: var(--ink-faint); font-size: 0.8rem; margin: 0; }

/* ------------------------------------------------------- document pages
   Legal pages are for reading, not for looking at. Same sky, quieter fittings,
   a comfortable measure and real hierarchy. */

.doc { padding: clamp(2.5rem, 6vw, 4.5rem) 0 5rem; }
.doc .wrap { max-width: 800px; }
.doc h1 { font-size: clamp(2.1rem, 5vw, 3.1rem); margin-bottom: 0.6rem; }
.doc .updated { color: var(--ink-faint); font-size: 0.86rem; margin-bottom: 2.5rem; }
.doc h2 { font-size: 1.42rem; margin: 2.6rem 0 0.85rem; }
.doc h3 { margin: 1.8rem 0 0.5rem; color: var(--gold); }
.doc p, .doc li { color: var(--ink-soft); }
.doc ul { padding-left: 1.15rem; margin: 0 0 1.2rem; }
.doc li { margin-bottom: 0.55rem; line-height: 1.6; }
.doc strong { color: var(--ink); }
.doc table { width: 100%; border-collapse: collapse; margin: 1.2rem 0 1.8rem; font-size: 0.92rem; }
.doc th, .doc td { text-align: left; padding: 0.7rem 0.6rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
.doc th { color: var(--ink); font-family: var(--ui); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; }
.doc td:first-child { color: var(--ink); font-weight: 600; white-space: nowrap; }
.doc .callout {
  border-left: 3px solid var(--teal);
  background: rgba(38, 173, 184, 0.08);
  padding: 1.1rem 1.3rem;
  border-radius: 0 14px 14px 0;
  margin: 1.6rem 0;
}
.doc .callout p:last-child { margin-bottom: 0; }

/* ---------------------------------------------------------------- reveals */

.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* Hero load-in: one orchestrated cascade rather than scattered fidgeting. */
.js .rise { opacity: 0; animation: rise 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) forwards; }
.rise:nth-child(1) { animation-delay: 0.05s; }
.rise:nth-child(2) { animation-delay: 0.15s; }
.rise:nth-child(3) { animation-delay: 0.25s; }
.rise:nth-child(4) { animation-delay: 0.35s; }
.rise:nth-child(5) { animation-delay: 0.45s; }
@keyframes rise { to { opacity: 1; transform: none; } }
.js .rise { transform: translateY(20px); }
@media (prefers-reduced-motion: reduce) {
  .js .rise { opacity: 1; transform: none; animation: none; }
}

:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 6px; }

/* ------------------------------------------------------------- brandmark
   A 30px mark in the masthead is navigation; it does not tell a first-time
   visitor where they have landed. The hero opens with the wordmark at real
   size, the kanji, and a plain gloss of what the word means — most of the
   audience will never have seen it before. */

.brandmark { margin-bottom: 1.6rem; }
.brandmark img {
  display: block;
  width: min(340px, 74vw);
  height: auto;
}
.brandmark-gloss {
  margin: 0.85rem 0 0;
  font-size: 0.92rem;
  color: var(--ink-faint);
  letter-spacing: 0.01em;
}
.brandmark-gloss i { color: var(--teal); font-style: italic; }

/* Honest labelling for anything that does not ship on day one. */
.soon {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.84rem;
  color: var(--gold);
  opacity: 0.85;
}

/* ------------------------------------------------------------ the flock
   Overlapping portraits, because a character lineup is the hook and a list of
   names is not. Each sits slightly higher than the last so the row reads as a
   crowd leaning in rather than a row of buttons. */

.flock {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  padding-left: 26px;      /* balances the negative margin below */
  margin-top: 2.5rem;
}
.flock img {
  width: clamp(74px, 11vw, 116px);
  height: clamp(74px, 11vw, 116px);
  border-radius: 50%;
  margin-left: -26px;
  border: 3px solid rgba(11, 16, 40, 0.9);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45);
  background: var(--night-1);
  position: relative;
  /* Stagger: alternating lift, so the row has a pulse instead of a flat edge. */
  transform: translateY(calc(var(--i) % 2 * -14px));
  z-index: calc(10 - var(--i));
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), z-index 0s;
}
.flock img:hover {
  transform: translateY(calc(var(--i) % 2 * -14px)) translateY(-12px) scale(1.07);
  z-index: 20;
}
@media (prefers-reduced-motion: reduce) { .flock img { transition: none; } }