/* PeakMode site — restrained, media-first. System fonts, one accent. */
:root {
  --accent: #D6156F;        /* brand magenta, darkened for text contrast */
  --accent-soft: #FDEBF4;
  --bg: #FFFFFF;
  --bg-alt: #F6F6F9;
  --text: #1D1D22;
  --muted: #63636C;
  --line: #E6E6EB;
  --keycap-bg: #F2F2F6;
  --keycap-line: #DCDCE4;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
          "Hiragino Sans", "Noto Sans JP", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Japanese: break lines at phrase boundaries where supported, never
   mid-word in headings; balance multi-line headings everywhere. */
:lang(ja) { word-break: auto-phrase; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
img, video { max-width: 100%; display: block; }

.wrap { max-width: 1320px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { line-height: 1.3; letter-spacing: -0.01em; }

/* ---- nav ---- */
.nav {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px;
  padding: 20px 0;
}
.nav .brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px; color: var(--text);
}
.nav .brand:hover { text-decoration: none; }
.nav .brand img { width: 32px; height: 32px; border-radius: 7px; }
.nav .links {
  margin-left: auto; display: flex; flex-wrap: wrap; align-items: center;
  gap: 8px 24px; font-size: 14px; justify-content: flex-end;
}
.nav .links a { color: var(--muted); white-space: nowrap; }
.nav .links a:hover { color: var(--text); text-decoration: none; }
.nav { position: relative; }
.nav-toggle { display: none; }
@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex; flex-direction: column;
    justify-content: center; align-items: center; gap: 4px;
    margin-left: auto; width: 42px; height: 38px;
    background: var(--bg); border: 1px solid var(--line);
    border-radius: 8px; cursor: pointer; padding: 0;
  }
  .nav-toggle span {
    display: block; width: 18px; height: 2px;
    background: var(--text); border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
  }
  .nav.open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav.open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .nav.has-toggle .links { display: none; }
  .nav.has-toggle.open .links {
    display: flex; flex-direction: column; align-items: stretch; gap: 0;
    position: absolute; top: calc(100% + 8px); left: 0; right: 0;
    background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.10);
    padding: 8px; z-index: 50;
  }
  .nav.has-toggle.open .links a { padding: 11px 14px; font-size: 15px; border-radius: 8px; }
  .nav.has-toggle.open .links a:hover { background: var(--bg-alt); color: var(--text); }
}

/* ---- hero ---- */
.hero { padding: 56px 0 0; text-align: center; }
.hero h1 {
  font-size: clamp(32px, 5.4vw, 52px);
  font-weight: 700;
  max-width: 720px; margin: 0 auto 20px;
}
.hero .sub {
  max-width: 600px; margin: 0 auto 28px;
  font-size: 17px; color: var(--muted);
}
.hero .cta { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.store-badge {
  display: inline-block;
  background: var(--text); color: #fff;
  border-radius: 10px; padding: 12px 22px;
  font-size: 15px; font-weight: 600;
}
.store-badge:hover { text-decoration: none; opacity: 0.88; }
.hero .req { font-size: 13px; color: var(--muted); }
.hero-media { margin: 48px auto 0; max-width: 880px; }

/* ---- media slots (filled with video/img later; placeholder until then) ---- */
.media { border-radius: var(--radius); overflow: hidden; }
.media video, .media img { width: 100%; height: auto; }
.media.placeholder {
  aspect-ratio: 16 / 10;
  background: var(--bg-alt);
  border: 1.5px dashed var(--keycap-line);
  display: grid; place-items: center;
}
.media.placeholder span {
  font-family: var(--mono); font-size: 12.5px; color: var(--muted);
  padding: 0 20px; text-align: center;
}

/* ---- works-with strip ---- */
.works {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  margin-top: 56px; padding: 16px 0;
}
.works .wrap {
  display: flex; flex-wrap: wrap; gap: 8px 24px;
  align-items: center; justify-content: center;
  font-size: 13.5px; color: var(--muted);
}

/* ---- primary features: alternating rows ---- */
.features { padding: 72px 0 8px; }
.features > .wrap > h2 {
  font-size: clamp(26px, 3.6vw, 34px); font-weight: 700;
  margin-bottom: 6px;
}
.features .lede { color: var(--muted); margin-bottom: 48px; max-width: 660px; }
.feature-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 44px; align-items: center;
  padding: 28px 0;
}
.feature-row .text h3 { font-size: 21px; font-weight: 700; margin-bottom: 10px; }
.feature-row .text p { color: var(--muted); font-size: 15.5px; margin-bottom: 14px; }
.feature-row:nth-of-type(even) .media { order: -1; }
.keycap {
  display: inline-block;
  font-family: var(--mono); font-size: 12px; color: var(--muted);
  background: var(--keycap-bg);
  border: 1px solid var(--keycap-line);
  border-bottom-width: 2px;
  border-radius: 6px; padding: 3px 10px;
  white-space: nowrap;
}

/* ---- secondary features: compact list ---- */
.more { padding: 48px 0 24px; }
.more h2 { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
.more-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.more-item {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 18px 16px;
}
.more-item h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 5px; }
.more-item p { font-size: 13.5px; color: var(--muted); margin-bottom: 10px; }

/* ---- privacy strip ---- */
.privacy-strip {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  margin-top: 64px; padding: 56px 0;
}
body:has(.privacy-strip) footer { margin-top: 0; }
.privacy-strip h2 { font-size: 24px; font-weight: 700; margin-bottom: 10px; }
.privacy-strip p { color: var(--muted); max-width: 640px; font-size: 15.5px; }
.privacy-strip .facts {
  display: flex; flex-wrap: wrap; gap: 8px 10px; margin: 20px 0 16px;
}
.privacy-strip .fact {
  font-size: 13.5px; color: var(--text);
  background: var(--bg); border: 1px solid var(--line);
  border-radius: 999px; padding: 6px 16px;
}

/* ---- faq / article pages ---- */
.faq { padding: 56px 0 8px; max-width: 900px; margin: 0 auto; }
.faq h1 { font-size: clamp(28px, 4vw, 36px); font-weight: 700; margin-bottom: 28px; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 2px; }
.faq summary {
  font-weight: 600; font-size: 16px; cursor: pointer;
  list-style: none; display: flex; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-family: var(--mono); }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); font-size: 15px; padding: 10px 0 4px; max-width: 860px; }

.contact-box {
  margin-top: 40px; padding: 24px;
  background: var(--bg-alt); border: 1px solid var(--line);
  border-radius: var(--radius);
}
.contact-box h2 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.contact-box p { color: var(--muted); font-size: 14.5px; margin-bottom: 14px; }
.button {
  display: inline-block;
  background: var(--accent); color: #fff;
  border-radius: 8px; padding: 10px 20px;
  font-size: 14.5px; font-weight: 600;
}
.button:hover { text-decoration: none; opacity: 0.9; }

.article { padding: 56px 0 8px; max-width: 900px; margin: 0 auto; }
.article h1 { font-size: clamp(28px, 4vw, 36px); font-weight: 700; margin-bottom: 6px; }
.article .date { font-family: var(--mono); font-size: 12.5px; color: var(--muted); margin-bottom: 32px; }
.article h2 { font-size: 19px; font-weight: 700; margin: 30px 0 8px; }
.article p, .article li { color: #3E3E46; font-size: 15px; }
.article ul { padding-left: 22px; margin: 6px 0; }
.article .callout {
  border: 1px solid var(--line);
  background: var(--bg-alt); border-radius: 10px;
  padding: 14px 18px; margin: 18px 0; font-size: 14.5px;
}

/* ---- feature list page ---- */
.article .lede { color: var(--muted); margin-bottom: 20px; max-width: 720px; }
.feature-toc { display: flex; flex-wrap: wrap; gap: 8px 10px; margin: 0 0 12px; }
.feature-toc a {
  font-size: 13.5px; color: var(--text);
  background: var(--bg-alt); border: 1px solid var(--line);
  border-radius: 999px; padding: 5px 14px; white-space: nowrap;
}
.feature-toc a:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }
.article h2 .keycap { margin-left: 10px; vertical-align: 2px; }
.article h2 { scroll-margin-top: 16px; }
.article li { margin-bottom: 5px; }
.article li ul { margin: 5px 0 2px; }
.table-scroll { overflow-x: auto; margin: 14px 0 6px; }
.article table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.article th {
  text-align: left; font-size: 12.5px; color: var(--muted);
  border-bottom: 2px solid var(--line); padding: 8px 10px; white-space: nowrap;
}
.article td { border-bottom: 1px solid var(--line); padding: 9px 10px; }
.more .all-link { margin-top: 22px; font-size: 15px; }

/* ---- docs layout (feature reference) ---- */
.docs {
  max-width: 1320px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 236px minmax(0, 1fr);
  gap: 56px; align-items: start;
}
.docs-nav {
  position: sticky; top: 0;
  max-height: 100vh; overflow-y: auto;
  padding: 44px 0 32px; font-size: 13.5px;
}
.docs-nav .group {
  font-size: 11.5px; font-weight: 700; letter-spacing: 0.08em;
  color: var(--muted); text-transform: uppercase;
  margin: 22px 0 6px; padding-left: 15px;
}
.docs-nav .group:first-child { margin-top: 0; }
.docs-nav a {
  display: block; padding: 6px 14px;
  color: var(--muted); border-left: 2px solid var(--line);
}
.docs-nav a:hover { color: var(--text); text-decoration: none; }
.docs-nav a.active {
  color: var(--accent); border-left-color: var(--accent);
  font-weight: 600; background: var(--accent-soft);
}
.docs-main { padding: 40px 0 8px; min-width: 0; }
.docs-main .crumbs { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.docs-main .crumbs a { color: var(--muted); }
.docs-main h1 { font-size: clamp(28px, 4vw, 38px); font-weight: 700; margin-bottom: 10px; }
.docs-main .lede { color: var(--muted); max-width: 760px; }
.docs-main h2 {
  font-size: 23px; font-weight: 700;
  margin: 46px 0 10px; padding-top: 30px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 20px;
}
.docs-main p, .docs-main li { color: #3E3E46; font-size: 15px; }
.docs-main p { max-width: 780px; }
.docs-main ul { padding-left: 22px; margin: 10px 0; max-width: 800px; }
.docs-main li { margin-bottom: 6px; }
.docs-media {
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; margin: 20px 0 10px; max-width: 900px;
}
.docs-media img { width: 100%; height: auto; display: block; }
.docs-media figcaption {
  font-size: 13px; color: var(--muted);
  padding: 9px 14px; border-top: 1px solid var(--line);
  background: var(--bg-alt);
}
.docs-main .table-scroll { max-width: 900px; }
.docs-main .contact-box { max-width: 900px; }
.docs-main .contact-box h2 {
  font-size: 18px; margin: 0 0 6px;
  border-top: 0; padding-top: 0;
}
.docs-toc-toggle { display: none; }
@media (max-width: 920px) {
  .docs { display: block; }
  .docs-nav {
    position: static; max-height: none; overflow: visible;
    display: flex; flex-wrap: wrap; gap: 6px 8px; padding: 28px 0 0;
  }
  .docs-nav .group { display: none; }
  .docs-nav a { border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px; }
  .docs-nav a.active { border-color: var(--accent); background: var(--accent-soft); }
  .docs-toc-toggle {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; margin-top: 24px; padding: 11px 16px;
    background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
    font-size: 15px; font-weight: 600; color: var(--text);
    font-family: var(--font); cursor: pointer;
  }
  .docs-toc-toggle::after {
    content: ""; width: 8px; height: 8px;
    border-right: 1.5px solid var(--muted); border-bottom: 1.5px solid var(--muted);
    transform: rotate(45deg) translateY(-2px); transition: transform 0.2s;
  }
  .docs-toc-toggle[aria-expanded="true"]::after { transform: rotate(-135deg) translateY(-2px); }
  .docs-nav.collapsible { display: none; }
  .docs-nav.collapsible.open { display: flex; padding-top: 12px; }
  .docs-main { padding-top: 18px; }
  .docs-main h2 { margin-top: 34px; padding-top: 24px; }
}

/* ---- footer ---- */
footer {
  border-top: 1px solid var(--line);
  margin-top: 72px; padding: 30px 0 44px;
  font-size: 13.5px; color: var(--muted);
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 26px; align-items: center; }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }
footer .copy { margin-left: auto; }

@media (max-width: 720px) {
  .hero { padding-top: 36px; }
  .feature-row { grid-template-columns: 1fr; gap: 18px; padding: 22px 0; }
  .feature-row:nth-of-type(even) .media { order: 0; }
  footer .copy { margin-left: 0; }
}