/* CISLUNAR FRONT 2075 LP
   設計書: docs/design-brief.md（A+B・ダーク固定・角丸なし・主役は最初の画面の戦闘映像1つ）
   BEM はフラットなセレクタで書く。入れ子は状態とメディアクエリだけ */

:root {
  /* 色: 飽和色のアクセントはオレンジ1色（行動ボタンだけ） */
  --color-bg: #05070b;
  --color-bg-alt: #0a0e14;
  --color-text: #eef3f7;
  --color-text-muted: #a7b4c1;
  --color-primary: #5fd4e6;
  --color-accent: #ff8a3d;
  --color-border: rgba(95, 212, 230, .28);

  /* 文字 */
  --font-en: "Oxanium", system-ui, sans-serif;
  --font-ja: "Zen Kaku Gothic New", system-ui, sans-serif;
  --font-size-base: clamp(1rem, .95rem + .25vw, 1.0625rem);
  --line-height-body: 1.85;

  /* 余白・幅 */
  --space-sm: clamp(.75rem, .6rem + .5vw, 1rem);
  --space-md: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
  --space-lg: clamp(3rem, 2rem + 3vw, 5rem);
  --space-xl: clamp(5rem, 3rem + 5vw, 8rem);
  --container-max: 1200px;
  --container-padding: clamp(16px, 4vw, 56px);
  --bar: clamp(28px, 8vh, 88px);

  /* 角丸は使わない（コンセプトの制約）。影はほぼ使わない */
  --radius-md: 0;

  /* 動き（Q11 A 落ち着いた） */
  --ease-default: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-base: .6s;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body { background: var(--color-bg); color: var(--color-text); font-family: var(--font-ja); font-size: var(--font-size-base); line-height: var(--line-height-body); }
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

.nw { white-space: nowrap; }
.wrap { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }
.eyebrow { font-family: var(--font-en); font-weight: 500; font-size: .76rem; letter-spacing: .28em; color: var(--color-primary); }
.h2 { font-size: clamp(1.6rem, 3.4vw, 2.6rem); font-weight: 700; line-height: 1.35; margin-top: .6rem; word-break: keep-all; }
.lead { margin-top: var(--space-sm); color: var(--color-text-muted); word-break: keep-all; max-width: 32em; }
.lead p + p { margin-top: 1em; }
.note { font-size: .82rem; color: var(--color-text-muted); }

/* 行動ボタン: オレンジはここだけ。ホバーは反転（Q5-E）。高さ48px以上 */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 1.7rem; font-weight: 700; text-decoration: none; letter-spacing: .06em;
  background: var(--color-accent); color: #170a02; border: 1px solid var(--color-accent); border-radius: var(--radius-md);
  transition: background-color .2s, color .2s; }
.btn:hover, .btn:focus-visible { background: transparent; color: var(--color-accent); }
.btn--large { min-height: 64px; padding: 0 2.4rem; font-size: 1.15rem; }

/* 映画の黒帯（セクションの区切り） */
.band { background: #000; padding: clamp(14px, 3vh, 28px) var(--container-padding); font-family: var(--font-en); font-size: .72rem; letter-spacing: .3em; color: var(--color-text-muted);
  display: flex; justify-content: space-between; gap: 1rem; border-top: 1px solid var(--color-border); }

/* ===== 1 最初の画面（主役: 背景の戦闘映像・段3） ===== */
.hero { position: relative; height: 100dvh; min-height: 600px; overflow: clip; background: #000; }
.hero__media { position: absolute; inset: var(--bar) 0; }
/* 最初の表示（LCP）は静止画。映像は読み込めたら上に重ねる */
.hero__poster, .hero__video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__video { opacity: 0; transition: opacity .8s var(--ease-default); }
.hero__video.is-ready { opacity: 1; }
.hero__shade { position: absolute; inset: var(--bar) 0;
  background: linear-gradient(0deg, rgba(0,0,0,.88) 0%, rgba(0,0,0,.35) 46%, rgba(0,0,0,0) 66%), linear-gradient(90deg, rgba(0,0,0,.6) 0%, rgba(0,0,0,0) 58%); }
.hero__bar { position: absolute; left: 0; right: 0; height: var(--bar); display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0 var(--container-padding); font-family: var(--font-en); font-size: .72rem; letter-spacing: .3em; color: var(--color-text-muted); }
.hero__bar--top { top: 0; }
.hero__bar--bottom { bottom: 0; }
.hero__body { position: absolute; left: var(--container-padding); right: var(--container-padding); bottom: calc(var(--bar) + clamp(20px, 5vh, 56px)); max-width: 40rem; }
.hero__title { font-family: var(--font-en); font-weight: 700; font-size: clamp(2.6rem, 6.4vw, 5.2rem); line-height: .95; letter-spacing: .02em; margin-top: .5rem; }
.hero__sub { display: block; font-size: .34em; font-weight: 500; letter-spacing: .32em; color: var(--color-text-muted); margin-top: .5rem; }
.hero__lead { margin-top: 1.2rem; font-size: clamp(1.3rem, 2.6vw, 1.9rem); font-weight: 700; line-height: 1.45; word-break: keep-all; text-shadow: 0 2px 16px rgba(0,0,0,.6); }
.hero__text { margin-top: .7rem; color: var(--color-text-muted); word-break: keep-all; max-width: 32em; font-size: .95rem; }
.hero__actions { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; align-items: center; }

/* ===== 2 宇宙空間での戦闘（実際のゲーム画面＋説明・非対称） ===== */
.combat { padding: var(--space-xl) 0; background: var(--color-bg) linear-gradient(90deg, transparent calc(100% - 1px), rgba(95,212,230,.06) 0) 0 0 / 120px 120px; }
.combat__grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: var(--space-lg); align-items: start; }
.combat__shots { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; }
.shot { border: 1px solid var(--color-border); background: #000; }
.shot--main { grid-column: 1 / -1; }
.shot__img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.shot__cap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0 1rem; padding: 6px 10px; font-size: .78rem; color: var(--color-text-muted); border-top: 1px solid var(--color-border); }
.shot__cap span { white-space: nowrap; }
.shot__tag { font-family: var(--font-en); letter-spacing: .14em; color: var(--color-primary); }
.specs { margin-top: var(--space-md); border-top: 1px solid var(--color-border); }
.spec { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--color-border); }
.spec__label { font-family: var(--font-en); font-weight: 700; font-size: .8rem; letter-spacing: .18em; color: var(--color-primary); padding-top: .2rem; }
.spec__title { display: block; font-size: 1.05rem; font-weight: 700; }
.spec__text { display: block; color: var(--color-text-muted); font-size: .92rem; margin-top: .2rem; word-break: keep-all; }
.key { font-family: var(--font-en); font-size: .8rem; border: 1px solid var(--color-border); padding: 0 .35em; margin: 0 .1em; color: var(--color-text); }

/* ===== 3 世界観（タイトル絵がゆっくり寄る・段1） ===== */
.briefing { position: relative; min-height: 92vh; overflow: clip; display: grid; align-items: end; background: var(--color-bg-alt); }
.briefing__media { position: absolute; inset: 0; }
.briefing__img { width: 100%; height: 100%; object-fit: cover; object-position: 66% 50%; scale: 1.08; transition: scale 2.4s var(--ease-default); }
.briefing.is-in .briefing__img { scale: 1; }
.briefing__shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,7,11,.95) 0%, rgba(5,7,11,.75) 40%, rgba(5,7,11,.1) 72%); }
.briefing__body { position: relative; padding: var(--space-xl) var(--container-padding); max-width: 42rem; }
.log { margin-top: var(--space-md); font-family: var(--font-en); font-size: .78rem; letter-spacing: .14em; color: var(--color-text-muted); border-left: 2px solid var(--color-primary); padding-left: 1rem; line-height: 2; }

/* ===== 4 全9面（縦に並ぶ航路） ===== */
.route { padding: var(--space-xl) 0; }
.route__head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-md); align-items: end; }
.route__list { list-style: none; padding: 0; margin-top: var(--space-lg); position: relative; }
.route__list::before { content: ""; position: absolute; left: 1.4rem; top: 0; bottom: 0; width: 1px; background: var(--color-border); }
.leg { position: relative; display: grid; grid-template-columns: 2.8rem minmax(0, 220px) minmax(0, 1fr); gap: clamp(12px, 2vw, 28px); align-items: center; padding: 14px 0; }
.leg__num { position: relative; z-index: 1; width: 2.8rem; text-align: center; font-family: var(--font-en); font-weight: 700; font-size: .85rem; color: var(--color-primary); background: var(--color-bg); padding: .3rem 0; border: 1px solid var(--color-border); }
.leg__img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border: 1px solid var(--color-border); }
.leg__name { font-family: var(--font-en); font-weight: 700; font-size: clamp(1rem, 1.6vw, 1.2rem); letter-spacing: .06em; }
.leg__radio { margin-top: .2rem; word-break: keep-all; }
.leg__radio::before { content: "RIKA ── "; font-family: var(--font-en); font-size: .72rem; letter-spacing: .14em; color: var(--color-primary); }
.leg__boss { margin-top: .3rem; font-family: var(--font-en); font-size: .74rem; letter-spacing: .16em; color: var(--color-text-muted); }
.leg--last .leg__num { background: var(--color-primary); color: #001014; }

/* ===== 5 乗員（大きさに差をつけて並べる） ===== */
.crew { padding: var(--space-xl) 0; background: var(--color-bg-alt); }
.crew__grid { margin-top: var(--space-lg); display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: var(--space-md); align-items: start; }
.crew__side { display: grid; gap: var(--space-md); align-content: start; }
.member { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: var(--space-sm); align-items: end; border-top: 1px solid var(--color-border); padding-top: var(--space-sm); }
/* リカ（主人公）は絵を大きく、上にそろえる */
.member--lead { grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); align-items: start; }
.member--lead .member__name { font-size: clamp(1.4rem, 2.6vw, 2rem); }
.member__img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.member__role { font-family: var(--font-en); font-size: .72rem; letter-spacing: .2em; color: var(--color-primary); }
.member__name { font-size: clamp(1.15rem, 2vw, 1.5rem); font-weight: 700; margin-top: .2rem; }
.member__text { margin-top: .5rem; color: var(--color-text-muted); font-size: .92rem; word-break: keep-all; }

/* ===== 6 出撃 ===== */
.launch { position: relative; padding: var(--space-xl) 0; overflow: clip; background: #000 url(../assets/stages/s09-cislunar-front.webp) center / cover; }
.launch::before { content: ""; position: absolute; inset: 0; background: rgba(0,0,0,.72); }
.launch__inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: var(--space-lg); align-items: center; }
.launch__actions { margin-top: var(--space-md); display: grid; gap: .6rem; justify-items: start; }
.req { border-top: 1px solid var(--color-border); }
.req__row { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: 1rem; padding: .9rem 0; border-bottom: 1px solid var(--color-border); font-size: .92rem; }
.req__label { font-family: var(--font-en); font-size: .76rem; letter-spacing: .16em; color: var(--color-primary); padding-top: .15rem; }

.footer { padding: var(--space-md) var(--container-padding); display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1rem; font-family: var(--font-en); font-size: .72rem; letter-spacing: .2em; color: var(--color-text-muted); border-top: 1px solid var(--color-border); }

/* 2つ目以降の画面は、画面に近づくまで描画と並べ直しを省く（K19 長いLP向け）。
   フォントが後から届いた時の、ページ全体の並べ直しを軽くする */
.combat, .briefing, .route, .crew, .launch { content-visibility: auto; contain-intrinsic-size: auto 900px; }

/* 画像は帯が開くように現れる（Q4: 段1）。見出しは下からせり上がる（Q8: 段1） */
@supports (animation-timeline: view()) {
  .reveal-mask { animation: mask-open linear both; animation-timeline: view(); animation-range: entry 0% entry 60%; }
  .rise { animation: rise linear both; animation-timeline: view(); animation-range: entry 10% entry 70%; }
}
@keyframes mask-open { from { clip-path: inset(0 0 100% 0); } to { clip-path: inset(0 0 0 0); } }
@keyframes rise { from { opacity: 0; translate: 0 1.2em; } to { opacity: 1; translate: 0 0; } }

/* 常駐: スクロールで出る「出撃する」（K18 6.5）。最初の画面では見えず押せない */
.sticky-cta { position: fixed; right: var(--container-padding); bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 20;
  animation: cta-in linear both; animation-timeline: scroll(root); animation-range: 70vh 100vh; }
@keyframes cta-in { from { opacity: 0; visibility: hidden; translate: 0 16px; } to { opacity: 1; visibility: visible; translate: 0 0; } }

/* タッチだけの端末で「PCで遊ぶリンクを送る」を押した結果（コピーした等）を伝える。見えない時もクリックを吸わない */
.share-status { position: fixed; left: var(--container-padding); right: var(--container-padding); bottom: calc(80px + env(safe-area-inset-bottom)); z-index: 21;
  margin: 0; padding: .8rem 1rem; background: #000; border: 1px solid var(--color-primary); color: var(--color-text); font-size: .9rem; text-align: center;
  pointer-events: none; opacity: 0; visibility: hidden; transition: opacity .2s, visibility .2s; }
.share-status.is-shown { opacity: 1; visibility: visible; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero__video { display: none; }
  .briefing__img { scale: 1; transition: none; }
  .reveal-mask, .rise { animation: none; }
}

@media (max-width: 760px) {
  .hero__bar--top span:last-child { display: none; }
  .combat__grid, .route__head, .crew__grid, .launch__inner { grid-template-columns: minmax(0, 1fr); }
  .spec { grid-template-columns: minmax(0, 1fr); gap: .2rem; }
  .briefing__shade { background: linear-gradient(0deg, rgba(5,7,11,.97) 0%, rgba(5,7,11,.8) 55%, rgba(5,7,11,.2) 100%); }
  .leg { grid-template-columns: 2.8rem minmax(0, 1fr); }
  .leg__img { grid-column: 2; }
  .leg__body { grid-column: 2; }
  .member, .member--lead { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
  .req__row { grid-template-columns: minmax(0, 1fr); gap: .1rem; }
  .sticky-cta { left: var(--container-padding); }
  .footer { padding-bottom: 96px; }
}