/* ============================================================
   Roomtone LP
   アプリのデザイン言語に準拠:
   - 黒背景 (#000) + 白テキスト、opacity 階層 (0.9 / 0.55 / 0.3)
   - monospace、ALL CAPS + 広い letter-spacing
   - 装飾は罫線 (0.5px, 白 8〜12%) のみ
   ============================================================ */

:root {
    --fg: rgba(255, 255, 255, 0.9);
    --fg-mid: rgba(255, 255, 255, 0.55);
    --fg-dim: rgba(255, 255, 255, 0.3);
    --line: rgba(255, 255, 255, 0.12);
    --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    background: #000;
    color: var(--fg);
    font-family: var(--mono);
    -webkit-font-smoothing: antialiased;
}

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

/* ---------- 背景 canvas ---------- */

#bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    display: block;
}

/* ---------- Hero (index) ---------- */

.hero {
    position: relative;
    z-index: 1;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 24px;
    gap: 40px;
}

.hero__logo img {
    width: clamp(190px, 42vw, 340px);
    height: auto;
    display: block;
    opacity: 0.92;
}

.appstore-badge {
    display: inline-block;
    margin-top: 8px;
}

.appstore-badge img {
    display: block;
    height: 48px;
    width: auto;
    opacity: 0.92;
    transition: opacity 0.25s ease;
}

.appstore-badge:hover img { opacity: 1; }

/* ---------- Footer (全ページ共通) ---------- */

.foot {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 28px 24px 36px;
    border-top: 0.5px solid var(--line);
}

/* index では viewport 下端に固定気味に置く */
.hero + .foot {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    border-top: none;
    padding-bottom: 24px;
    background: linear-gradient(rgba(0,0,0,0), rgba(0,0,0,0.7));
}

.foot__links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 22px;
}

.foot__links a {
    font-size: 10px;
    letter-spacing: 0.25em;
    color: var(--fg-mid);
    transition: color 0.25s ease;
}

.foot__links a:hover { color: var(--fg); }

.foot__copy {
    display: flex;
    gap: 8px;
    font-size: 9px;
    letter-spacing: 0.2em;
    color: var(--fg-dim);
}

/* ---------- 下層ページ共通 (nav + 本文) ---------- */

.nav {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    border-bottom: 0.5px solid var(--line);
}

.nav__brand {
    font-size: 12px;
    letter-spacing: 0.42em;
    color: var(--fg);
}

.nav__back {
    font-size: 10px;
    letter-spacing: 0.25em;
    color: var(--fg-mid);
}

.nav__back:hover { color: var(--fg); }

.page {
    position: relative;
    z-index: 1;
    max-width: 640px;
    margin: 0 auto;
    padding: 56px 28px 96px;
}

.page__title {
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.45em;
    color: var(--fg);
    margin-bottom: 8px;
}

.page__updated {
    font-size: 9px;
    letter-spacing: 0.15em;
    color: var(--fg-dim);
    margin-bottom: 12px;
}

/* legal: 日英併記の言語ジャンプリンク */
.page__lang {
    font-size: 9px;
    letter-spacing: 0.15em;
    margin-bottom: 48px;
}

.page__lang a {
    color: var(--fg-mid);
    text-decoration: none;
    border-bottom: 0.5px solid var(--line);
}

.page__lang a:hover {
    color: var(--fg);
}

/* ---------- リリースノート ---------- */

.ver {
    padding: 36px 0;
    border-top: 0.5px solid var(--line);
}

.ver__head {
    display: flex;
    align-items: baseline;
    gap: 14px;
    margin-bottom: 20px;
}

.ver__num {
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--fg);
}

.ver__date {
    font-size: 9px;
    letter-spacing: 0.15em;
    color: var(--fg-dim);
}

.ver__latest {
    font-size: 8px;
    letter-spacing: 0.25em;
    color: var(--fg-mid);
    border: 0.5px solid var(--line);
    padding: 3px 8px;
}

.ver p {
    font-size: 11px;
    letter-spacing: 0.08em;
    line-height: 2;
    color: var(--fg-mid);
    margin-bottom: 14px;
}

.ver__cat {
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 0.3em;
    color: var(--fg);
    margin: 22px 0 10px;
}

.ver ul { list-style: none; }

.ver li {
    font-size: 11px;
    letter-spacing: 0.08em;
    line-height: 1.9;
    color: var(--fg-mid);
    padding-left: 16px;
    position: relative;
    margin-bottom: 8px;
}

.ver li::before {
    content: "\2014";   /* — */
    position: absolute;
    left: 0;
    color: var(--fg-dim);
}

/* ---------- Legal ---------- */

.legal h2 {
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.35em;
    color: var(--fg);
    margin: 56px 0 24px;
    padding-top: 32px;
    border-top: 0.5px solid var(--line);
}

.legal h3 {
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--fg);
    margin: 28px 0 10px;
}

.legal p {
    font-size: 11px;
    letter-spacing: 0.08em;
    line-height: 2;
    color: var(--fg-mid);
    margin-bottom: 12px;
}

.legal ul { list-style: none; margin-bottom: 12px; }

.legal li {
    font-size: 11px;
    letter-spacing: 0.08em;
    line-height: 1.9;
    color: var(--fg-mid);
    padding-left: 16px;
    position: relative;
    margin-bottom: 6px;
}

.legal li::before {
    content: "\2014";
    position: absolute;
    left: 0;
    color: var(--fg-dim);
}

.legal a {
    color: var(--fg);
    border-bottom: 0.5px solid var(--fg-dim);
}

.legal strong { color: var(--fg); font-weight: 400; }

/* ---------- 404 ---------- */

.notfound {
    position: relative;
    z-index: 1;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.notfound h1 {
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.45em;
    color: var(--fg);
}

.notfound a {
    font-size: 10px;
    letter-spacing: 0.25em;
    color: var(--fg-mid);
}