/* Nagi Tools site. One stylesheet for every page and language; colors follow the app's Ocean Blue. */
:root {
  --blue: #2b8cdb;
  --blue-deep: #1e5f9e;
  --blue-soft: #dceeff;
  --ink: #16202b;
  --ink-2: #4a5866;
  --line: #e3e9f0;
  --bg: #f5f8fc;
  --card: #ffffff;
  --accent: #f08a6c;
  --strong: #1e5f9e;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(22, 32, 43, 0.08);
  --max: 1120px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eef5;
    --ink-2: #a6b4c2;
    --line: #2a3644;
    --bg: #0f151c;
    --card: #17202a;
    --blue-soft: #1d3a55;
    --strong: #8cc8ff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}
:lang(ja) body, body:lang(ja) { line-height: 1.85; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); }
a:hover { color: var(--blue-deep); }
h1, h2, h3 { line-height: 1.3; margin: 0 0 0.5em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.15rem; }
h1, h2 { text-wrap: balance; }
/* Japanese: break at phrase boundaries, not in the middle of a word. */
:lang(ja) h1, :lang(ja) h2, :lang(ja) h3, :lang(ja) .lead { word-break: auto-phrase; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.wrap.narrow { max-width: 900px; }
.muted { color: var(--ink-2); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; background: var(--card); padding: 8px 12px; border-radius: 8px; z-index: 10; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--ink); text-decoration: none; font-size: 1.1rem; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  display: grid; place-items: center; color: #fff; font-size: 0.95rem; font-weight: 800;
}
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a { color: var(--ink); text-decoration: none; padding: 8px 12px; border-radius: 10px; font-weight: 600; font-size: 0.95rem; }
.nav a:hover, .nav a[aria-current="page"] { background: var(--blue-soft); color: var(--strong); }
.lang { margin-left: 8px; border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px !important; font-size: 0.85rem !important; }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; color: var(--ink); font: inherit; }
@media (max-width: 760px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--card); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
  .nav.open { display: flex; }
  .lang { margin: 8px 0 0; text-align: center; }
}

/* Hero */
.hero { padding: 64px 0 40px; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.eyebrow { display: inline-block; font-weight: 700; color: var(--strong); background: var(--blue-soft); padding: 4px 12px; border-radius: 999px; font-size: 0.85rem; margin-bottom: 16px; }
.lead { font-size: 1.15rem; color: var(--ink-2); max-width: 36em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px;
  font-weight: 700; text-decoration: none; border: 2px solid transparent; font-size: 1rem;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-deep); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--card); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.badge-soon { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 12px; background: var(--card); border: 1px dashed var(--blue); color: var(--ink-2); font-weight: 600; font-size: 0.95rem; }
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero { padding-top: 40px; }
}

/* Phone frames */
.phones { position: relative; display: flex; justify-content: center; gap: 18px; }
.phone {
  width: min(260px, 44vw); aspect-ratio: 9 / 20; border-radius: 34px; padding: 9px;
  background: #0f151c; box-shadow: 0 24px 50px rgba(15, 30, 50, 0.28);
}
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 26px; }
.phones .phone:nth-child(2) { transform: translateY(36px); }
.phone.small { width: min(220px, 70vw); }

/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 44em; margin-bottom: 32px; }
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
section.alt .card { box-shadow: none; background: var(--bg); }
.icon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: var(--blue-soft); color: var(--strong); margin-bottom: 14px;
}
.icon svg { width: 24px; height: 24px; }

/* Feature rows: text beside a phone */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 28px 0; }
.feature-row.flip .feature-text { order: 2; }
.feature-row .phone { margin: 0 auto; width: min(240px, 60vw); }
.feature-row ul { padding-left: 1.2em; margin: 0; }
.feature-row li { margin: 0.3em 0; }
@media (max-width: 860px) {
  .feature-row { grid-template-columns: 1fr; gap: 24px; }
  .feature-row.flip .feature-text { order: 0; }
}

/* Steps */
.steps { counter-reset: step; display: grid; gap: 16px; grid-template-columns: repeat(3, 1fr); }
.step { position: relative; padding-top: 56px; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: 20px; left: 24px; width: 30px; height: 30px; border-radius: 50%;
  background: var(--blue); color: #fff; font-weight: 800; display: grid; place-items: center;
}
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* Feature list */
.checks { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 28px; }
.checks li { padding-left: 30px; position: relative; }
.checks li::before { content: ""; position: absolute; left: 0; top: 0.45em; width: 18px; height: 18px; border-radius: 50%; background: var(--blue-soft); }
.checks li::after { content: ""; position: absolute; left: 6px; top: calc(0.45em + 4px); width: 5px; height: 9px; border: solid var(--blue); border-width: 0 2px 2px 0; transform: rotate(45deg); }
@media (max-width: 700px) { .checks { grid-template-columns: 1fr; } }

/* Notes and callouts */
.callout { border-left: 4px solid var(--blue); background: var(--blue-soft); padding: 16px 20px; border-radius: 0 12px 12px 0; }
.callout p:last-child { margin: 0; }
.price-box { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 860px) { .price-box { grid-template-columns: 1fr; } }

/* App list */
.app-card { display: grid; grid-template-columns: 96px 1fr; gap: 20px; align-items: center; text-decoration: none; color: var(--ink); }
.app-card img { width: 96px; height: 96px; border-radius: 22px; }
.app-card:hover h3 { color: var(--blue); }

/* Docs (guide, FAQ, policies) */
.doc { display: grid; grid-template-columns: 240px 1fr; gap: 40px; padding: 40px 0 64px; }
.toc { position: sticky; top: 84px; align-self: start; font-size: 0.95rem; }
.toc ol { padding-left: 1.2em; margin: 0; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--blue); }
.doc-body h2 { margin-top: 1.8em; padding-top: 0.4em; scroll-margin-top: 84px; }
.doc-body h2:first-child { margin-top: 0; }
.doc-body h3 { margin-top: 1.4em; scroll-margin-top: 84px; }
.doc-body ul, .doc-body ol { padding-left: 1.3em; }
.doc-body li { margin: 0.3em 0; }
.doc-body table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: 0.95rem; }
.doc-body th, .doc-body td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.doc-body th { background: var(--blue-soft); width: 32%; }
@media (max-width: 860px) {
  .doc { grid-template-columns: 1fr; }
  .toc { position: static; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; }
}
.ui { font-weight: 700; white-space: nowrap; }
kbd { font-family: inherit; background: var(--blue-soft); border-radius: 6px; padding: 1px 7px; font-weight: 700; font-size: 0.92em; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; margin: 10px 0; }
details summary { cursor: pointer; font-weight: 700; padding: 14px 0; list-style: none; position: relative; padding-right: 28px; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; position: absolute; right: 0; top: 10px; font-size: 1.4rem; color: var(--blue); }
details[open] summary::after { content: "−"; }
details > div { padding-bottom: 14px; }
.page-head { padding: 48px 0 8px; }
.crumbs { font-size: 0.9rem; color: var(--ink-2); margin-bottom: 8px; }
.crumbs a { color: var(--ink-2); }
.subnav { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; }
.subnav a { text-decoration: none; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink); font-weight: 600; font-size: 0.9rem; background: var(--card); }
.subnav a[aria-current="page"] { background: var(--blue); border-color: var(--blue); color: #fff; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0; font-size: 0.92rem; color: var(--ink-2); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-footer a { color: var(--ink-2); text-decoration: none; }
.site-footer a:hover { color: var(--blue); }

/* Language chooser page */
.chooser { min-height: 100vh; display: grid; place-items: center; text-align: center; padding: 24px; }
.chooser .row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }