/*
 * 明るく、余白の広い構成。
 * 文字を詰め込まず、アプリの画面そのものを見せることを優先しています。
 * サイズはすべてclamp()で指定し、モバイルからデスクトップまで同じ規則で伸縮します。
 */

:root {
  --color-ink: #1d1d1f;
  --color-muted: #6e6e73;
  --color-bg: #ffffff;
  --color-surface: #f5f5f7;
  --color-line: rgb(0 0 0 / 10%);
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-surface-strong: #ebebed;
  --color-progress-bg: #e7f5ec;
  --color-progress-ink: #17703c;
  --color-team-bg: #eceaf6;
  --color-team-ink: #4b3f8a;
  --font-base:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", "Hiragino Sans",
    "Yu Gothic", YuGothic, sans-serif;
  --container-width: 1120px;
  --page-gutter: max(20px, calc((100vw - var(--container-width)) / 2));
  --header-height: 56px;
  --radius-card: clamp(20px, 3vw, 30px);
  --transition: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-bg);
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ページ全体の移動量を、細い光のラインで知らせます。 */
body::before {
  position: fixed;
  z-index: 1001;
  top: 0;
  left: 0;
  width: calc(var(--page-progress, 0) * 100%);
  height: 8px;
  background: linear-gradient(90deg, #ff6b9c, #8b7cf6, #52b5ff);
  box-shadow: 0 0 12px rgb(115 116 255 / 45%);
  content: "";
  pointer-events: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 16px;
  border-radius: 980px;
  background: var(--color-ink);
  color: #fff;
  font-size: 14px;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------------------------------------------------------------- header -- */

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  border-bottom: 1px solid transparent;
  transition:
    background var(--transition),
    border-color var(--transition);
}

.site-header.is-scrolled {
  border-color: var(--color-line);
  background: rgb(255 255 255 / 82%);
  backdrop-filter: saturate(180%) blur(20px);
}

.header-inner {
  display: flex;
  width: min(calc(100% - 40px), var(--container-width));
  height: 100%;
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  width: 28px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 50%;
  background: var(--color-ink);
  color: #fff;
  font-size: 12px;
}

.site-navigation {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.2vw, 30px);
  font-size: 13px;
}

.site-navigation a {
  color: var(--color-muted);
  transition: color var(--transition);
}

.site-navigation a:hover {
  color: var(--color-ink);
}

.navigation-pill {
  padding: 6px 14px;
  border-radius: 980px;
  background: var(--color-surface);
}

.menu-button {
  display: none;
  padding: 10px;
  border: 0;
  background: transparent;
  color: inherit;
}

.menu-button > span:not(.visually-hidden) {
  display: block;
  width: 20px;
  height: 1.5px;
  margin: 5px auto;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--transition);
}

/* ------------------------------------------------------------- typography -- */

.eyebrow-small {
  display: flex;
  margin: 0;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--color-muted);
  font-size: clamp(12px, 1.4vw, 14px);
  font-weight: 600;
  letter-spacing: 0.01em;
}

h1,
h2,
h3 {
  font-weight: 700;
  letter-spacing: -0.022em;
}

.button {
  display: inline-flex;
  min-height: 44px;
  padding: 0 22px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  transition:
    background var(--transition),
    color var(--transition),
    opacity var(--transition);
}

.button-primary {
  background: var(--color-accent);
  color: #fff;
}

.button-primary:hover {
  background: var(--color-accent-hover);
}

.button-secondary {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.button-secondary:hover {
  background: rgb(0 113 227 / 8%);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  color: var(--color-accent);
  font-size: 15px;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.chip {
  display: inline-flex;
  padding: 7px 14px;
  align-items: center;
  border: 0;
  border-radius: 980px;
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.chip-progress {
  background: var(--color-progress-bg);
  color: var(--color-progress-ink);
}

.chip-team {
  background: var(--color-team-bg);
  color: var(--color-team-ink);
}

.chip-filter {
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition);
}

.chip-filter:hover {
  background: var(--color-surface-strong);
}

.chip-filter.is-active {
  background: var(--color-ink);
  color: #fff;
}

.chip-row {
  display: flex;
  margin-bottom: clamp(28px, 4vw, 44px);
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.chip-row-center {
  margin: 14px 0 0;
}

.upcoming {
  margin-top: clamp(36px, 5vw, 56px);
  text-align: center;
}

.upcoming .section-note {
  margin: 0;
}

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

.hero {
  position: relative;
  padding: calc(var(--header-height) + clamp(44px, 7vw, 88px)) 0 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 12%, rgb(244 210 223 / 62%), transparent 25%),
    radial-gradient(circle at 83% 18%, rgb(211 226 255 / 74%), transparent 28%),
    linear-gradient(180deg, #fbfbfd 0%, #fff 78%);
}

.hero-intro {
  position: relative;
  z-index: 2;
  display: grid;
  width: min(calc(100% - (var(--page-gutter) * 2)), 880px);
  margin-inline: auto;
  justify-items: center;
  text-align: center;
  opacity: calc(1 - (var(--hero-progress, 0) * 0.78));
  transform: translateY(calc(var(--hero-progress, 0) * -34px));
  will-change: transform, opacity;
}

.hero-eyebrow {
  margin: 0 0 14px;
  color: var(--color-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.hero-intro h1 {
  max-width: 12em;
  margin: 0;
  font-size: clamp(36px, 7vw, 72px);
  line-height: 1.04;
}

.hero-lead {
  max-width: 38em;
  margin: clamp(22px, 3vw, 30px) 0 0;
  color: var(--color-muted);
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.8;
}

.hero-action {
  display: inline-flex;
  margin-top: clamp(22px, 3vw, 30px);
  padding-bottom: 5px;
  align-items: center;
  border-bottom: 1px solid currentColor;
  font-size: 13px;
  font-weight: 600;
  gap: 9px;
}

.hero-action span {
  transition: transform var(--transition);
}

.hero-action:hover span {
  transform: translateY(3px);
}

.hero-summary {
  display: flex;
  margin: clamp(22px, 3vw, 30px) 0 0;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 22px;
  color: var(--color-muted);
  font-size: 13px;
}

.hero-summary span {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
}

.hero-summary strong {
  color: var(--color-ink);
  font-size: 20px;
  font-variant-numeric: tabular-nums;
}

/* -------------------------------------------------------------- device -- */

.device {
  width: 100%;
  aspect-ratio: 880 / 1787;
}

.device-frame {
  position: relative;
  height: 100%;
}

.device-frame::before {
  position: absolute;
  z-index: 0;
  inset: 1.9% 3.8% 1.5%;
  border-radius: 13.5% / 6.4%;
  background: #0b0c0a;
  box-shadow: 0 20px 28px rgb(0 0 0 / 20%);
  content: "";
  transition: box-shadow 320ms ease;
}

.device-screen {
  position: absolute;
  z-index: 1;
  inset: 1.9% 3.8% 1.5%;
  overflow: hidden;
  border-radius: 13.5% / 6.4%;
  background: #0b0c0a;
}

.device-shot {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.device-island {
  position: absolute;
  z-index: 2;
  top: 2.4%;
  left: 50%;
  width: 28%;
  height: 3.25%;
  border-radius: 999px;
  background: #050505;
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 2%);
  transform: translateX(-50%);
}

.device-shell {
  position: absolute;
  z-index: 3;
  width: 100%;
  height: 100%;
  inset: 0;
  object-fit: fill;
  pointer-events: none;
  user-select: none;
}

.device-placeholder {
  display: grid;
  height: 100%;
  align-content: center;
  justify-items: center;
  gap: 10px;
  padding: 0 12%;
  text-align: center;
}

.device-placeholder-paper {
  background: var(--color-surface);
}

.device-placeholder-night {
  background: radial-gradient(130% 78% at 50% 8%, #3c4874 0%, #1a2140 52%, #0a0d1b 100%);
  color: #eef1ff;
}

.device-placeholder-mark {
  font-size: 22px;
  font-weight: 600;
}

.device-placeholder-caption {
  font-size: 11px;
  line-height: 1.6;
  opacity: 0.8;
}

/* ------------------------------------------------------------ carousel -- */

.carousel {
  /* 車輪の幾何。画面幅ごとの調整はこの4つを差し替えるだけで済みます。 */
  --wheel-radius: 2600px;
  --wheel-step: 4.05;
  --wheel-visible: 4;
  --device-width: 168px;
  --carousel-accent: var(--color-surface);

  position: relative;
  margin-top: clamp(10px, 2vw, 24px);
  opacity: calc(1 - (var(--hero-progress, 0) * 0.48));
  transform: translateY(calc(var(--hero-progress, 0) * -72px))
    scale(calc(1 - (var(--hero-progress, 0) * 0.07)))
    rotate(calc(var(--hero-progress, 0) * -1.4deg));
  transform-origin: 50% 20%;
  will-change: transform;
}

.carousel-head {
  padding: 0 var(--page-gutter);
}

/* アプリ1本ずつの情報は、端末の真上の中央に置きます。 */
.carousel-panel {
  position: relative;
  z-index: 200;
  display: grid;
  margin-top: clamp(24px, 4vw, 40px);
  padding: 0 var(--page-gutter);
  justify-items: center;
  gap: clamp(14px, 2vw, 20px);
  text-align: center;
}

.carousel-panel-body {
  display: grid;
  max-width: 34em;
  justify-items: center;
  gap: 8px;
}

.carousel-panel-body > .carousel-category,
.carousel-panel-body > .carousel-name,
.carousel-panel-body > .carousel-tagline,
.carousel-panel-body .carousel-actions {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
  transition:
    opacity 140ms ease,
    transform 180ms ease,
    filter 180ms ease;
}

/* 中央の端末が変わるとき、操作ボタンは残してアプリ情報だけを薄くします。 */
.carousel-panel-body.is-changing > .carousel-category,
.carousel-panel-body.is-changing > .carousel-name,
.carousel-panel-body.is-changing > .carousel-tagline,
.carousel-panel-body.is-changing .carousel-actions {
  opacity: 0;
  transform: translateY(4px);
  filter: blur(2px);
}

/*
 * 行数を測るための複製置き場です。
 * アプリごとに名前の長さも説明の行数も違うので、切り替えるたびにボタンや端末の位置が
 * 上下しないよう、JavaScriptが全アプリぶんをここへ並べて、いちばん高い行数を測ります。
 * 幅はパネル本体と同じにしてあるので、折り返しの行数も同じになります。
 * 測り終えた時点で取り除かれるため、画面には出ません。
 */
.carousel-panel-bench {
  position: absolute;
  z-index: -1;
  top: 0;
  right: var(--page-gutter);
  left: var(--page-gutter);
  visibility: hidden;
  pointer-events: none;
}

.carousel-category {
  display: flex;
  margin: 0;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 600;
}

.carousel-status {
  padding: 5px 12px;
  border-radius: 980px;
  background: var(--color-surface);
  color: var(--color-muted);
}

.carousel-team {
  padding: 5px 12px;
  border-radius: 980px;
  background: var(--color-team-bg);
  color: var(--color-team-ink);
}

/* displayを持つ要素にも効くよう、専用のクラスで隠します。 */
.is-hidden {
  display: none !important;
}

.carousel-status.is-progress {
  background: var(--color-progress-bg);
  color: var(--color-progress-ink);
}

.carousel-name {
  margin: 2px 0 0;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.15;
}

.carousel-tagline {
  margin: 0;
  color: var(--color-muted);
  font-size: clamp(14px, 1.8vw, 17px);
  line-height: 1.5;
}

.carousel-toolbar,
.carousel-actions,
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
}

.carousel-toolbar {
  margin-top: 6px;
  gap: clamp(14px, 2vw, 22px);
}

.carousel-actions {
  gap: clamp(12px, 1.6vw, 18px);
}

.carousel-controls {
  gap: 14px;
}

.carousel-button {
  display: grid;
  width: 40px;
  aspect-ratio: 1;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-ink);
  cursor: pointer;
  transition:
    background var(--transition),
    transform var(--transition);
}

.carousel-button:hover {
  background: var(--color-surface-strong);
}

.carousel-button:active {
  transform: scale(0.94);
}

.carousel-counter {
  min-width: 56px;
  margin: 0;
  color: var(--color-muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

/*
 * 高さはJavaScriptが実測して --stage-height に入れます。
 * 端末は車輪の中心を軸に回るため、外側ほど下がって傾き、外接矩形が縦に伸びるからです。
 * ここでの値はJavaScriptが動かない場合の目安です。
 */
.carousel-stage {
  position: relative;
  height: var(--stage-height, calc(var(--device-width) * 2.17 + 200px));
  margin-top: clamp(16px, 2.5vw, 28px);
  touch-action: pan-y;
}

.carousel.is-ready .carousel-stage {
  cursor: grab;
}

.carousel.is-dragging .carousel-stage {
  cursor: grabbing;
}

/* 中央のアプリの色を、背景の光として受けます。 */
.carousel.is-ready .carousel-stage::before {
  position: absolute;
  inset: 0;
  background: radial-gradient(closest-side at 50% 46%, var(--carousel-accent), transparent 78%);
  content: "";
  opacity: 0.85;
  transition: background 420ms ease;
}

/*
 * 既定はJavaScriptなしでも読める横スクロール。
 * is-ready が付いたときだけ円弧レイアウトへ切り替えます。
 */
.carousel-track {
  display: flex;
  height: 100%;
  margin: 0;
  padding: 0 var(--page-gutter);
  align-items: center;
  gap: 20px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}

.carousel-track > li {
  flex: 0 0 var(--device-width);
  scroll-snap-align: center;
}

.carousel.is-ready .carousel-track {
  position: absolute;
  display: block;
  padding: 0;
  inset: 0;
  overflow: visible;
}

.carousel.is-ready .carousel-slot {
  position: absolute;
  top: 24px;
  left: 50%;
  width: var(--device-width);
  margin-left: calc(var(--device-width) / -2);
  transform-origin: 50% var(--wheel-radius);
  will-change: transform, opacity;
}

.carousel.is-ready .carousel-link {
  display: block;
  transform: scale(var(--slot-scale, 1));
  transform-origin: 50% 50%;
}

.carousel-slot.is-active .device-frame::before {
  box-shadow:
    0 30px 60px rgb(0 0 0 / 22%),
    inset 0 0 0 1px rgb(255 255 255 / 26%);
}

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

.section {
  padding: clamp(64px, 9vw, 120px) var(--page-gutter);
}

.series-section,
.contact-section {
  background: var(--color-surface);
}

.section-heading {
  margin-bottom: clamp(32px, 5vw, 60px);
  text-align: center;
}

.section-heading h2 {
  max-width: 16em;
  margin: 8px auto 0;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.12;
}

.section-note {
  max-width: 30em;
  margin: 14px auto 0;
  color: var(--color-muted);
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.6;
}

.section-more {
  margin: clamp(28px, 4vw, 44px) 0 0;
  text-align: center;
}

.empty-note {
  margin: 32px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  text-align: center;
}

/* ------------------------------------------------------ featured card -- */

.feature-cards {
  display: grid;
  gap: clamp(22px, 3.6vw, 48px);
}

.feature-card {
  --scene-focus: 0;
  --scene-shift: 0;

  position: relative;
  display: grid;
  min-height: min(720px, 72vw);
  padding: clamp(18px, 2.4vw, 32px);
  align-items: center;
  overflow: hidden;
  border: 1px solid rgb(0 0 0 / 6%);
  border-radius: clamp(24px, 4vw, 46px);
  background:
    radial-gradient(circle at 90% 8%, var(--app-accent), transparent 28%),
    var(--color-surface);
  box-shadow: 0 22px 70px rgb(0 0 0 / 7%);
  gap: clamp(28px, 5vw, 72px);
  grid-template-columns: minmax(0, 1.25fr) minmax(240px, 0.75fr);
}

.feature-card::before {
  position: absolute;
  z-index: 0;
  right: clamp(18px, 4vw, 54px);
  bottom: clamp(-28px, -2vw, -8px);
  color: rgb(29 29 31 / 5%);
  content: attr(data-feature-number);
  font-size: clamp(110px, 17vw, 210px);
  font-weight: 800;
  letter-spacing: -0.09em;
  line-height: 1;
  pointer-events: none;
}

.feature-card > * {
  position: relative;
  z-index: 1;
}

.feature-visual {
  --scene-focus: 0;
  --scene-shift: 0;

  position: relative;
  display: block;
  width: 100%;
  min-height: clamp(420px, 52vw, 650px);
  overflow: hidden;
  border-radius: clamp(18px, 3vw, 32px);
  background: var(--app-accent);
  box-shadow: 0 30px 70px rgb(0 0 0 / calc(0.08 + (var(--scene-focus) * 0.12)));
  isolation: isolate;
  transform: scale(calc(0.94 + (var(--scene-focus) * 0.06)))
    rotate(calc(var(--scene-shift) * -0.45deg));
  transform-origin: 50% 50%;
  will-change: transform;
}

.feature-ambient {
  position: absolute;
  width: 112%;
  height: 112%;
  inset: -6%;
  object-fit: cover;
  filter: blur(16px) saturate(0.9);
  opacity: 0.2;
  transform: translateY(calc(var(--scene-shift) * -64px))
    scale(calc(1.16 + (var(--scene-focus) * 0.06)));
  transition: filter 500ms ease;
  will-change: transform;
}

.feature-visual::after {
  position: absolute;
  z-index: 1;
  background: linear-gradient(140deg, rgb(255 255 255 / 18%), rgb(0 0 0 / 15%));
  content: "";
  inset: 0;
}

.feature-device-primary,
.feature-device-secondary {
  position: absolute;
  z-index: 3;
}

.feature-device-primary {
  top: 7%;
  left: 50%;
  width: min(39%, 250px);
  transform: translateX(-50%) translateY(calc(var(--scene-shift) * -68px))
    rotate(calc(-1.5deg + (var(--scene-shift) * 4deg)))
    scale(calc(0.9 + (var(--scene-focus) * 0.1)));
  will-change: transform;
}

.feature-visual:has(.feature-device-secondary) .feature-device-primary {
  left: 18%;
  transform: translateY(calc(var(--scene-shift) * -68px))
    rotate(calc(-4deg + (var(--scene-shift) * 4deg)))
    scale(calc(0.9 + (var(--scene-focus) * 0.1)));
}

.feature-device-secondary {
  right: 15%;
  bottom: 3%;
  width: min(33%, 210px);
  transform: translateY(calc(var(--scene-shift) * 82px))
    rotate(calc(6deg - (var(--scene-shift) * 5deg)))
    scale(calc(0.88 + (var(--scene-focus) * 0.12)));
  will-change: transform;
}

.feature-visual-recolle .feature-ambient {
  filter: saturate(0.86) brightness(0.72);
  opacity: 1;
}

.feature-visual-recolle::after {
  background: linear-gradient(115deg, rgb(2 8 18 / 10%), rgb(2 8 18 / 48%));
}

.feature-open {
  position: absolute;
  z-index: 5;
  top: 18px;
  right: 18px;
  display: inline-flex;
  padding: 10px 14px;
  align-items: center;
  border: 1px solid rgb(255 255 255 / 42%);
  border-radius: 999px;
  background: rgb(20 20 22 / 48%);
  color: #fff;
  font-size: 12px;
  backdrop-filter: blur(14px);
  gap: 7px;
}

.feature-open span {
  transition: transform var(--transition);
}

.feature-visual:hover .feature-open span {
  transform: translate(2px, -2px);
}

.feature-card:nth-child(even) {
  grid-template-columns: minmax(240px, 0.75fr) minmax(0, 1.25fr);
}

.feature-card:nth-child(even) .feature-visual {
  order: 2;
}

.feature-body {
  display: grid;
  justify-items: start;
  gap: 10px;
  text-align: left;
  opacity: calc(0.62 + (var(--scene-focus) * 0.38));
  transform: translateY(calc(var(--scene-shift) * -18px));
  will-change: transform, opacity;
}

.feature-body .eyebrow-small {
  justify-content: flex-start;
}

.feature-body h3 {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.2;
}

.feature-value {
  max-width: 15em;
  margin: 8px 0 2px;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.feature-tagline {
  max-width: 26em;
  margin: 0;
  color: var(--color-muted);
  font-size: clamp(14px, 1.7vw, 17px);
  line-height: 1.5;
}

.development-card {
  min-height: 0;
  margin-top: clamp(16px, 2vw, 24px);
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
}

.development-card .feature-visual {
  display: grid;
  min-height: clamp(390px, 44vw, 540px);
  padding: clamp(24px, 4vw, 44px);
  place-items: center;
}

.development-card .feature-visual::after {
  display: none;
}

.development-card .feature-visual > .device {
  position: relative;
  z-index: 2;
  width: min(210px, 54vw);
}

.app-actions {
  display: flex;
  margin-top: 10px;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
}

/* -------------------------------------------------------------- series -- */

.series-grid {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
  list-style: none;
}

.series-tile > a {
  display: grid;
  min-height: 132px;
  padding: 18px 10px 14px;
  align-content: center;
  justify-items: center;
  border: 1px solid rgb(255 255 255 / 9%);
  border-radius: 22px;
  background: rgb(255 255 255 / 5%);
  gap: 10px;
  text-align: center;
  transition:
    background var(--transition),
    transform var(--transition);
}

.tile-icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 2px 10px rgb(0 0 0 / 10%);
  transition: transform var(--transition);
}

.tile-icon-text {
  display: grid;
  place-items: center;
  background: var(--app-accent);
  font-size: 22px;
  font-weight: 700;
}

.series-tile > a:hover .tile-icon {
  transform: scale(1.07);
}

.series-tile > a:hover {
  background: rgb(255 255 255 / 10%);
  transform: translateY(-3px);
}

.series-grid.is-play-pending .series-tile {
  opacity: 0;
  transform: translateY(22px) scale(0.92);
}

.series-grid.is-play-visible .series-tile {
  animation: tile-rise 620ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.series-grid.is-play-visible .series-tile:nth-child(6n + 2) {
  animation-delay: 45ms;
}

.series-grid.is-play-visible .series-tile:nth-child(6n + 3) {
  animation-delay: 90ms;
}

.series-grid.is-play-visible .series-tile:nth-child(6n + 4) {
  animation-delay: 135ms;
}

.series-grid.is-play-visible .series-tile:nth-child(6n + 5) {
  animation-delay: 180ms;
}

.series-grid.is-play-visible .series-tile:nth-child(6n + 6) {
  animation-delay: 225ms;
}

@keyframes tile-rise {
  from {
    opacity: 0;
    transform: translateY(22px) scale(0.92);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.tile-name {
  color: #fff;
  font-size: 12px;
  line-height: 1.4;
}

.series-section {
  background: #111216;
  color: #fff;
}

.series-heading-grid {
  display: grid;
  margin-bottom: clamp(32px, 5vw, 58px);
  align-items: end;
  gap: 28px;
  grid-template-columns: minmax(0, 1fr) auto;
}

.series-heading-grid .section-heading {
  margin: 0;
  text-align: left;
}

.series-heading-grid .section-heading h2,
.series-heading-grid .section-note {
  margin-left: 0;
}

.series-heading-grid .section-note {
  color: rgb(255 255 255 / 60%);
}

.series-count {
  display: grid;
  margin: 0;
  justify-items: end;
  color: rgb(255 255 255 / 60%);
  font-size: 12px;
  gap: 4px;
}

.series-count strong {
  color: #fff;
  font-size: clamp(72px, 12vw, 132px);
  font-weight: 700;
  letter-spacing: -0.08em;
  line-height: 0.8;
}

.series-section .chip-filter {
  background: rgb(255 255 255 / 8%);
  color: rgb(255 255 255 / 66%);
}

.series-section .chip-filter:hover {
  background: rgb(255 255 255 / 14%);
}

.series-section .chip-filter.is-active {
  background: #fff;
  color: #111216;
}

/* --------------------------------------------------------- development -- */

.progress-list {
  display: grid;
  margin: 14px 0 0;
  padding: 0;
  gap: 8px;
  list-style: none;
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-muted);
  font-size: 13px;
}

.progress-mark {
  width: 10px;
  height: 10px;
  flex: 0 0 10px;
  border: 1.5px solid var(--color-muted);
  border-radius: 50%;
}

.progress-done,
.progress-doing {
  color: var(--color-ink);
}

.progress-done .progress-mark {
  border-color: var(--color-progress-ink);
  background: var(--color-progress-ink);
}

.progress-doing .progress-mark {
  border-color: var(--color-progress-ink);
}

/* -------------------------------------------------------------- contact -- */

.contact-section {
  text-align: center;
}

.contact-pending {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
}

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

.site-footer {
  padding: clamp(32px, 4vw, 48px) var(--page-gutter);
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 12px;
}

.footer-identity a {
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 600;
}

.footer-identity p {
  margin: 4px 0 0;
}

.footer-navigation {
  display: flex;
  margin-top: 18px;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.footer-navigation a:hover {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.copyright {
  margin: 20px 0 0;
}

/* -------------------------------------------------------- detail page -- */

.detail-page {
  width: min(calc(100% - 40px), var(--container-width));
  margin-inline: auto;
  padding: calc(var(--header-height) + clamp(28px, 5vw, 56px)) 0 clamp(64px, 8vw, 100px);
}

.breadcrumb {
  display: flex;
  margin-bottom: clamp(24px, 4vw, 40px);
  flex-wrap: wrap;
  gap: 8px;
  color: var(--color-muted);
  font-size: 13px;
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.detail-hero {
  display: grid;
  align-items: center;
  gap: clamp(28px, 5vw, 60px);
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.7fr);
}

.detail-hero h1 {
  margin: 0;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.12;
}

.detail-value {
  max-width: 14em;
  margin: 0 0 18px;
  font-size: clamp(24px, 3.8vw, 40px);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.3;
}

.feature-meta {
  display: flex;
  margin: 0 0 14px;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 600;
}

.status-badge {
  padding: 5px 12px;
  border-radius: 980px;
  background: var(--color-surface);
}

.status-badge-progress {
  background: var(--color-progress-bg);
  color: var(--color-progress-ink);
}

.detail-fullname {
  margin: 10px 0 0;
  color: var(--color-muted);
  font-size: 13px;
}

.detail-tagline {
  max-width: 26em;
  margin: 16px 0 0;
  color: var(--color-muted);
  font-size: clamp(15px, 2vw, 19px);
  line-height: 1.5;
}

.detail-hero-visual .device {
  width: min(240px, 62vw);
  margin-inline: auto;
}

.detail-body {
  display: grid;
  padding: clamp(40px, 6vw, 64px) 0;
  gap: clamp(28px, 5vw, 60px);
  grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
}

.detail-main h2 {
  margin: 32px 0 12px;
  font-size: clamp(19px, 2.2vw, 22px);
}

.detail-main h2:first-child {
  margin-top: 0;
}

.detail-main p {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.75;
}

/* 概要を段落で分けたときだけ、あいだを空けます。 */
.detail-main p + p {
  margin-top: 1em;
}

.feature-list,
.note-list {
  margin: 0;
  padding-left: 1.2em;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.85;
}

.note-list {
  font-size: 13px;
}

.detail-facts,
.app-facts {
  margin: 0 0 20px;
  padding: clamp(18px, 2.5vw, 24px);
  border-radius: clamp(14px, 2vw, 18px);
  background: var(--color-surface);
  font-size: 13px;
}

.detail-facts div,
.app-facts div {
  display: grid;
  padding: 8px 0;
  gap: 4px;
  grid-template-columns: 92px 1fr;
}

.detail-facts dt,
.app-facts dt {
  color: var(--color-muted);
}

.detail-facts dd,
.app-facts dd {
  margin: 0;
}

.detail-gallery,
.detail-related {
  padding: clamp(32px, 5vw, 48px) 0;
  border-top: 1px solid var(--color-line);
}

.detail-gallery h2,
.detail-related h2 {
  margin: 0 0 22px;
  font-size: clamp(19px, 2.2vw, 22px);
}

.gallery-track {
  display: flex;
  margin: 0;
  padding: 0 0 16px;
  gap: 16px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.gallery-track > li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.gallery-track .device {
  width: 170px;
}

.related-list {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  list-style: none;
}

.related-list a {
  display: grid;
  padding: 12px 16px;
  align-items: center;
  gap: 12px;
  border-radius: 14px;
  background: var(--color-surface);
  font-size: 14px;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  transition: background var(--transition);
}

.related-list a:hover {
  background: var(--color-surface-strong);
}

.related-list img {
  border-radius: 10px;
}

.related-list .tile-icon-text {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 17px;
}

.related-list i {
  color: var(--color-muted);
  font-style: normal;
}

/* ---------------------------------------------------------------- legal -- */

.legal-page {
  display: grid;
  width: min(calc(100% - 40px), var(--container-width));
  margin-inline: auto;
  padding: calc(var(--header-height) + clamp(28px, 5vw, 56px)) 0 clamp(64px, 8vw, 100px);
  gap: clamp(28px, 5vw, 60px);
  grid-template-columns: minmax(0, 240px) minmax(0, 700px);
}

.legal-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  align-self: start;
}

.legal-sidebar h1 {
  margin: 0 0 16px;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1.2;
}

.legal-sidebar > p:last-child {
  margin: 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.8;
}

.legal-notice {
  margin-bottom: 32px;
  padding: 20px;
  border-radius: 16px;
  background: var(--color-surface);
  font-size: 13px;
  line-height: 1.8;
}

.legal-content section {
  padding: 28px 0;
  border-top: 1px solid var(--color-line);
}

.legal-content h2 {
  margin: 0 0 14px;
  font-size: 18px;
}

.legal-content p,
.legal-content li {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.85;
}

.legal-content ul {
  padding-left: 1.3em;
}

.legal-content a {
  color: var(--color-accent);
}

.legal-app-list {
  display: grid;
  gap: 10px;
}

.legal-app-list > a {
  display: grid;
  padding: 14px 16px;
  align-items: center;
  border-radius: 14px;
  background: var(--color-surface);
  gap: 12px;
  grid-template-columns: auto minmax(0, 1fr) auto;
}

.legal-app-icon {
  display: grid;
  width: 40px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 10px;
  background: var(--app-accent);
  font-size: 16px;
  font-weight: 700;
}

.legal-app-list strong,
.legal-app-list small {
  display: block;
  font-size: 14px;
}

.legal-app-list small {
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 11px;
}

.legal-app-list i {
  color: var(--color-muted);
  font-style: normal;
}

/* ---------------------------------------------------------------- motion -- */

/* JavaScriptが動かない環境では、隠したままにせず最初から見せます。 */
@media (scripting: none) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 700ms ease,
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ----------------------------------------------------------- responsive -- */

/* 十分な高さがあるPCでは、代表作を一枚ずつ重ねるカードデッキにします。 */
@media (min-width: 861px) and (min-height: 680px) {
  .feature-cards {
    padding-bottom: 16vh;
    gap: 18vh;
  }

  .feature-card {
    position: sticky;
    top: calc(var(--header-height) + 20px);
    min-height: calc(100svh - var(--header-height) - 38px);
    align-self: start;
  }

  .feature-card .feature-visual {
    min-height: min(650px, calc(100svh - 150px));
  }
}

@media (max-width: 1100px) {
  .carousel {
    --wheel-radius: 2300px;
    --wheel-step: 4.4;
    --wheel-visible: 3;
    --device-width: 158px;
  }
}

@media (max-width: 860px) {
  .menu-button {
    position: relative;
    z-index: 102;
    display: block;
  }

  .menu-button[aria-expanded="true"] > span:first-child {
    transform: translateY(3.2px) rotate(45deg);
  }

  .menu-button[aria-expanded="true"] > span:nth-child(2) {
    transform: translateY(-3.2px) rotate(-45deg);
  }

  .site-navigation {
    position: fixed;
    z-index: 101;
    inset: 0;
    padding: calc(var(--header-height) + 32px) 28px 40px;
    align-items: flex-start;
    justify-content: flex-start;
    flex-direction: column;
    background: var(--color-bg);
    gap: 0;
    font-size: 22px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 240ms ease;
  }

  .site-navigation a {
    width: 100%;
    padding: 15px 0;
    border-bottom: 1px solid var(--color-line);
    color: var(--color-ink);
  }

  .site-navigation.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  .navigation-open .site-header {
    border-color: var(--color-line);
    background: var(--color-bg);
    backdrop-filter: none;
  }

  .navigation-pill {
    padding: 15px 0;
    border-radius: 0;
    background: transparent;
  }

  .navigation-open {
    overflow: hidden;
  }

  .carousel {
    --wheel-radius: 1900px;
    --wheel-step: 5.2;
    --wheel-visible: 3;
    --device-width: 146px;
  }

  /* モバイルでも、作品カードが同じ位置へ集まって重なるカードデッキにします。 */
  .feature-cards {
    padding-bottom: 12vh;
    gap: 14vh;
  }

  .feature-card,
  .feature-card:nth-child(even),
  .development-card {
    min-height: 0;
    gap: clamp(20px, 4vw, 28px);
    grid-template-columns: 1fr;
    text-align: center;
  }

  .feature-cards > .feature-card {
    position: sticky;
    top: calc(var(--header-height) + 12px);
    height: calc(100svh - var(--header-height) - 24px);
    min-height: 0;
    align-self: start;
    grid-template-rows: minmax(0, 1fr) auto;
  }

  /* 画像の最低高でカードを画面外へ押し出さず、アプリ名や操作も固定枠内に収めます。 */
  .feature-cards > .feature-card .feature-visual {
    height: 100%;
    min-height: 0;
  }

  .feature-card:nth-child(even) .feature-visual {
    order: 0;
  }

  .feature-visual {
    min-height: min(650px, 58svh);
  }

  .development-card .feature-visual {
    min-height: 430px;
  }

  .development-card .feature-visual > .device {
    width: min(180px, 48vw);
  }

  .feature-body {
    justify-items: center;
    text-align: center;
  }

  .feature-body .eyebrow-small {
    justify-content: center;
  }

  .app-actions {
    justify-content: center;
  }

  .series-heading-grid {
    align-items: start;
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .detail-hero,
  .detail-body {
    grid-template-columns: 1fr;
  }

  .detail-hero-visual {
    order: -1;
  }

  .legal-page {
    grid-template-columns: 1fr;
  }

  .legal-sidebar {
    position: static;
  }
}

@media (max-width: 560px) {
  .hero {
    padding-top: calc(var(--header-height) + 34px);
  }

  .hero-intro h1 {
    font-size: clamp(34px, 12vw, 50px);
  }

  .hero-summary {
    gap: 7px 16px;
  }

  .carousel {
    --wheel-radius: 1400px;
    --wheel-step: 6.4;
    --wheel-visible: 2;
    --device-width: 138px;
  }

  .series-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .tile-icon {
    width: 54px;
    height: 54px;
  }

  .series-tile > a {
    min-height: 122px;
    padding-inline: 6px;
    border-radius: 18px;
  }

  .series-heading-grid {
    align-items: start;
    grid-template-columns: 1fr;
  }

  .series-count {
    justify-items: start;
  }

  .feature-card {
    padding: 12px 12px 26px;
    border-radius: 28px;
  }

  .feature-visual {
    min-height: min(470px, 52svh);
    border-radius: 20px;
  }

  .feature-device-primary {
    top: 7%;
    width: 45%;
  }

  .feature-visual:has(.feature-device-secondary) .feature-device-primary {
    left: 9%;
  }

  .feature-device-secondary {
    right: 7%;
    bottom: 2%;
    width: 38%;
  }

  .feature-body {
    padding-inline: 10px;
  }

  .development-card .feature-visual {
    min-height: 400px;
  }

  .development-card .feature-visual > .device {
    width: min(170px, 48vw);
  }

  /* 狭い画面でもストア・公式サイト・詳しくを同じ行から並べ、足りない場合だけ折り返します。 */
  .app-actions {
    align-items: center;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .app-actions .button {
    width: auto;
  }

  .carousel-toolbar {
    width: 100%;
    flex-wrap: wrap;
    gap: 9px;
  }

  .carousel-actions {
    flex: 0 0 auto;
  }

  .carousel-controls {
    flex: 0 0 100%;
    gap: 9px;
  }

  .carousel-actions .button {
    min-height: 40px;
    padding-inline: 16px;
    font-size: 14px;
  }

  .carousel-button {
    width: 38px;
  }

  .detail-facts div,
  .app-facts div {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

.app-theme-app-6799114422 { --app-accent: #fbdce8; }
.app-theme-app-6793824889 { --app-accent: #dcefec; }
.app-theme-app-6793827936 { --app-accent: #e6e0f8; }
.app-theme-app-6793828455 { --app-accent: #dff0e1; }
.app-theme-app-6793827257 { --app-accent: #fbe0eb; }
.app-theme-app-6793826572 { --app-accent: #fbf3c4; }
.app-theme-app-6793824803 { --app-accent: #dcefec; }
.app-theme-app-6793826812 { --app-accent: #fbf3c4; }
.app-theme-app-6793824795 { --app-accent: #dcefec; }
.app-theme-app-6793825075 { --app-accent: #fbe0eb; }
.app-theme-app-6793826304 { --app-accent: #fbe7ce; }
.app-theme-app-6793827567 { --app-accent: #fbdcd1; }
.app-theme-app-6793824321 { --app-accent: #dbe8fb; }
.app-theme-app-6793826989 { --app-accent: #fbdcd1; }
.app-theme-app-6793824546 { --app-accent: #dcefec; }
.app-theme-app-6794031016 { --app-accent: #dbe8fb; }
.app-theme-app-6794024715 { --app-accent: #fbe7ce; }
.app-theme-app-6794030456 { --app-accent: #fbdcd1; }
.app-theme-app-6794026991 { --app-accent: #dff0e1; }
.app-theme-app-6794026354 { --app-accent: #dff0e1; }
.app-theme-app-6794026217 { --app-accent: #dff0e1; }
.app-theme-app-6794030013 { --app-accent: #fbf3c4; }
.app-theme-app-6794023915 { --app-accent: #fbe7ce; }
.app-theme-app-6793825501 { --app-accent: #fbe7ce; }
.app-theme-app-6794028648 { --app-accent: #dbe8fb; }
.app-theme-app-6794025892 { --app-accent: #fbf3c4; }
.app-theme-app-6794029112 { --app-accent: #fbe1dd; }
.app-theme-app-6794028112 { --app-accent: #fbdcd1; }
.app-theme-app-6794030050 { --app-accent: #dff0e1; }
.app-theme-app-6794024577 { --app-accent: #fbf3c4; }
.app-theme-app-6794029422 { --app-accent: #fbe1dd; }
.app-theme-app-6761267088 { --app-accent: #dbeade; }
.app-theme-app-6651861195 { --app-accent: #dbe8fb; }
.app-theme-app-6664053071 { --app-accent: #dbe8fb; }
.app-theme-app-6670407637 { --app-accent: #fae3cd; }
.app-theme-app-6470490487 { --app-accent: #f7dfec; }
.app-theme-app-6504882761 { --app-accent: #f7dfec; }
.app-theme-confida { --app-accent: #dbeade; }
.app-theme-omikuji-sama { --app-accent: #f7dfec; }