/* ==========================================================================
   Hodozip 公式サイト スタイルシート
   - フレームワーク / 外部フォント / 外部 CDN 不使用
   - ライト / ダークは prefers-color-scheme で自動切替
   ========================================================================== */

:root {
  color-scheme: light dark;

  --bg: #f7f8fa;
  --surface: #ffffff;
  --border: #e3e7ec;
  --text: #1b2430;
  --muted: #5a6572;

  --accent: #3a5bd9;
  --accent-strong: #2c46ad;
  --accent-soft: rgba(58, 91, 217, 0.09);
  --accent-contrast: #ffffff;

  --warn-fg: #9a5b0b;
  --warn-bg: #fbf0dc;

  --code-bg: #eef1f5;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06);

  --header-bg: rgba(247, 248, 250, 0.85);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --surface: #1a2029;
    --border: #2b333f;
    --text: #e8ebf1;
    --muted: #9aa5b2;

    --accent: #90a5f5;
    --accent-strong: #b7c4fb;
    --accent-soft: rgba(144, 165, 245, 0.14);
    --accent-contrast: #10131a;

    --warn-fg: #f0bd63;
    --warn-bg: rgba(240, 189, 99, 0.1);

    --code-bg: #212833;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);

    --header-bg: rgba(18, 22, 29, 0.85);
  }
}

/* --------------------------------------------------------------------------
   基本
   -------------------------------------------------------------------------- */

* {
  box-sizing: border-box;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

ul, ol {
  margin: 0.5em 0;
  padding-left: 1.4em;
}

li + li {
  margin-top: 0.3em;
}

a {
  color: inherit;
}

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

kbd {
  display: inline-block;
  padding: 0.05em 0.45em;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--surface);
  font-family: inherit;
  font-size: 0.85em;
}

code {
  font-family: ui-monospace, Consolas, "Cascadia Mono", Menlo, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  border-radius: 4px;
  padding: 0.1em 0.4em;
}

pre {
  margin: 0.7em 0;
  padding: 12px 15px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
  line-height: 1.6;
  font-size: 0.87rem;
}

pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

.container {
  max-width: 980px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 24px);
}

.inline-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.note {
  color: var(--muted);
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   ボタン
   -------------------------------------------------------------------------- */

.btn {
  display: inline-block;
  padding: 0.75em 1.5em;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.4;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  border-color: transparent;
  background: var(--accent);
  color: var(--accent-contrast);
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   サイトヘッダー（sticky 上部バー）
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  min-height: 56px;
  padding-block: 6px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: auto;
  color: var(--text);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.site-brand-icon {
  display: block;
  width: 30px;
  height: 30px;
  flex: none;
  border-radius: 8px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px 14px;
}

.site-nav a {
  padding: 4px 2px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
}

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

.site-nav .nav-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.site-nav .nav-github svg {
  width: 15px;
  height: 15px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ヒーロー内スタイルの言語切替を、ヘッダー内では横一列・縦中央に据える */
.site-header .lang-switch {
  justify-content: flex-start;
  margin-bottom: 0;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   ヒーロー
   -------------------------------------------------------------------------- */

.hero {
  padding: clamp(52px, 9vw, 96px) 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.lang-switch {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}

.lang-switch span,
.lang-switch a {
  padding: 0.3em 0.85em;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
}

.lang-switch a:hover {
  border-color: var(--accent);
}

.lang-switch [aria-current="page"] {
  border-color: transparent;
  background: var(--accent-soft);
  color: var(--accent);
}

.hero-eyebrow {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 0.05em;
}

.hero-title {
  margin: 0.4em 0 0;
  font-size: clamp(2.5rem, 7vw, 3.9rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.hero-tagline {
  margin-top: 0.15em;
  color: var(--accent);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  font-weight: 700;
}

.hero-lead {
  margin-top: 0.9em;
  max-width: 36em;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.12rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 1.7em;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 1.9em 0 0;
  padding: 0;
  list-style: none;
}

.hero-chips li {
  padding: 0.3em 0.85em;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--muted);
  font-size: 0.8rem;
  white-space: nowrap;
}

.hero-chips .chip-accent {
  border-color: transparent;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   ヒーロー: 画像ローテーション（右カラム / 狭い画面ではテキストの下）
   - フレームは 16:10 固定、画像は object-fit: contain で全体を表示する
   - 切り替えは docs/js/hero-rotator.js（素の JavaScript）
   -------------------------------------------------------------------------- */

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: center;
}

.hero-rot {
  margin: 0;
}

.hero-rot-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  background: var(--bg);
  box-shadow: var(--shadow);
}

.hero-rot-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
}

.hero-rot-slide.is-active {
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-rot-slide {
    transition: opacity 0.6s ease;
  }
}

/* キャプション（アプリの窓らしく、フレーム下部に帯で置く） */
.hero-rot-caption {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  margin: 0;
  padding: 0.4em 0.9em 0.45em;
  border-top: 1px solid var(--border);
  background: var(--code-bg);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-align: center;
}

.hero-rot-dots {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: 10px;
}

.hero-rot-dot {
  position: relative;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.hero-rot-dot::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--border);
}

@media (prefers-reduced-motion: no-preference) {
  .hero-rot-dot::before {
    transition: background-color 0.2s ease;
  }

  .hero-rot-dot:hover::before {
    background: var(--muted);
  }
}

.hero-rot-dot:hover::before {
  background: var(--muted);
}

.hero-rot-dot.is-active::before {
  background: var(--accent);
}

/* 広い画面ではテキストとローテーションを 2 カラムにする */
@media (min-width: 901px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 440px);
    gap: 44px;
  }
}

/* --------------------------------------------------------------------------
   セクション共通
   -------------------------------------------------------------------------- */

.section {
  padding: clamp(46px, 8vw, 84px) 0;
  scroll-margin-top: 64px; /* サイトヘッダー（56px）+ 余白 */
}

main .section + .section {
  border-top: 1px solid var(--border);
}

main .section:first-child {
  border-top: 0;
}

.section-title {
  margin: 0 0 0.9em;
  font-size: clamp(1.45rem, 3vw, 1.8rem);
  font-weight: 800;
}

.section-title::after {
  content: "";
  display: block;
  width: 2.2rem;
  height: 3px;
  margin-top: 0.5em;
  border-radius: 2px;
  background: var(--accent);
}

.section-lead {
  color: var(--muted);
  margin-bottom: 1.6em;
  max-width: 40em;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: var(--shadow);
}

/* --------------------------------------------------------------------------
   特徴
   -------------------------------------------------------------------------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature h3 {
  margin: 14px 0 6px;
  font-size: 1.02rem;
}

.feature p {
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.features-note {
  margin-top: 18px;
}

/* --------------------------------------------------------------------------
   スクリーンショット
   -------------------------------------------------------------------------- */

.shot-frame {
  display: grid;
  place-items: center;
  margin: 0;
  aspect-ratio: 16 / 9;
  border: 1.5px dashed var(--border);
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
}

.shot-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6em;
  color: var(--muted);
  font-size: 0.95rem;
}

.shot-icon svg {
  width: 38px;
  height: 38px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 実画像に差し替えたあとの見た目（<figure class="shot-frame has-image"> を使う） */
.shot-frame.has-image {
  aspect-ratio: auto;
  border-style: solid;
  padding: 10px;
}

.shot-frame.has-image img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

#screenshots .note {
  margin-top: 12px;
}

/* --------------------------------------------------------------------------
   ダウンロード
   -------------------------------------------------------------------------- */

.dl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 16px;
}

.dl-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dl-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.dl-head h3 {
  margin: 0;
  font-size: 1.15rem;
}

.badge {
  padding: 0.28em 0.8em;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
}

.badge-warn {
  background: var(--warn-bg);
  color: var(--warn-fg);
}

.dl-file {
  color: var(--muted);
  font-family: ui-monospace, Consolas, "Cascadia Mono", Menlo, monospace;
  font-size: 0.85rem;
}

.dl-list {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.dl-card .btn {
  margin-top: auto;
  align-self: flex-start;
}

.callout {
  margin-top: 28px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  font-size: 0.93rem;
}

.callout p {
  margin: 0;
}

/* --------------------------------------------------------------------------
   使い方
   -------------------------------------------------------------------------- */

.howto-block {
  margin-top: 20px;
  padding: clamp(18px, 3vw, 28px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.howto-block:first-of-type {
  margin-top: 0;
}

.howto-block h3 {
  margin: 0 0 0.6em;
  font-size: 1.15rem;
}

.howto-block h4 {
  margin: 1.4em 0 0.4em;
  font-size: 1rem;
}

.howto-block p {
  margin: 0.6em 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.howto-block li {
  color: var(--muted);
  font-size: 0.94rem;
}

.howto-block li strong,
.howto-block h3 strong {
  color: var(--text);
}

#howto .note {
  margin-top: 0.8em;
}

/* --------------------------------------------------------------------------
   開発を支援する
   -------------------------------------------------------------------------- */

#support {
  text-align: center;
}

#support .section-lead {
  margin-inline: auto;
  margin-bottom: 0;
}

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

/* --------------------------------------------------------------------------
   フッター
   -------------------------------------------------------------------------- */

.footer {
  padding: 34px 0 42px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.87rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6em 1.8em;
}

.footer-item {
  margin: 0;
}

.footer-item strong {
  color: var(--text);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6em 1.4em;
}

.footer-copy {
  margin-left: auto;
}

/* --------------------------------------------------------------------------
   狭い画面
   -------------------------------------------------------------------------- */

@media (max-width: 560px) {
  .footer-copy {
    margin-left: 0;
  }

  .hero-chips li {
    white-space: normal;
  }
}

/* --------------------------------------------------------------------------
   サイトヘッダー: 狭い画面では「ダウンロード」と言語切替が残るよう間引く
   （ハンバーガーメニュー等の JavaScript は使わない。あふれる場合は折り返す）
   -------------------------------------------------------------------------- */

@media (max-width: 640px) {
  .site-nav a:not(.nav-download) {
    display: none;
  }

  .site-brand {
    font-size: 1rem;
  }

  .lang-switch span,
  .lang-switch a {
    padding: 0.25em 0.65em;
    font-size: 0.75rem;
  }
}

@media (max-width: 400px) {
  /* 折り返してヘッダーが高くなる端末では、アンカー位置の余白も広げる */
  .section {
    scroll-margin-top: 96px;
  }
}