:root {
  color-scheme: light;
  --paper: #f3f4f4;
  --card: #ffffff;
  --ink: #151719;
  --muted: #62686d;
  --line: rgba(21, 23, 25, 0.12);
  --line-strong: rgba(21, 23, 25, 0.24);
  --blue: #2f688e;
  --blue-dark: #10283b;
  --blue-soft: #dce9f1;
  --orange: #d58a36;
  --orange-soft: #f3e2cb;
  --danger: #a63c34;
  --shadow: 0 18px 50px rgba(16, 40, 59, 0.09);
  --radius: 20px;
  --container: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "Noto Sans JP", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid rgba(47, 104, 142, 0.4); outline-offset: 3px; }

.container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(243, 244, 244, 0.9);
  backdrop-filter: blur(18px);
}
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 38px; height: 38px; border-radius: 10px; }
.brand-wordmark { display: grid; gap: 2px; }
.brand-wordmark strong { font-size: 15px; font-weight: 900; letter-spacing: 0.13em; }
.brand-wordmark small { color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: 0.04em; }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--muted); font-size: 13px; font-weight: 700; text-decoration: none; transition: color 180ms ease; }
.site-nav a:hover { color: var(--ink); }
.site-nav .language-link { padding-left: 20px; border-left: 1px solid var(--line); color: var(--blue); }

.calculator-hero { padding: 74px 0 86px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 0.84fr) minmax(620px, 1.16fr); align-items: center; gap: 64px; }
.eyebrow { margin: 0 0 18px; color: var(--blue); font-size: 12px; font-weight: 850; letter-spacing: 0.16em; text-transform: uppercase; }
.hero-copy h1 { max-width: 650px; margin: 0; font-size: clamp(48px, 6.5vw, 86px); line-height: 0.98; letter-spacing: -0.055em; font-weight: 900; }
.hero-copy h1 span { display: block; color: var(--blue); }
.hero-lead { max-width: 600px; margin: 28px 0 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 32px; }
.primary-link, .secondary-link {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0 22px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}
.primary-link { background: var(--blue-dark); color: #fff; }
.primary-link:hover { background: var(--blue); }
.secondary-link { border: 1px solid var(--line-strong); color: var(--ink); }
.secondary-link:hover { border-color: var(--blue); color: var(--blue); }
.hero-facts { display: flex; flex-wrap: wrap; gap: 18px 26px; margin: 34px 0 0; padding: 22px 0 0; border-top: 1px solid var(--line); }
.hero-facts div { display: grid; gap: 4px; }
.hero-facts dt { color: var(--muted); font-size: 11px; font-weight: 700; }
.hero-facts dd { margin: 0; font-size: 13px; font-weight: 800; }

.calculator-shell { overflow: hidden; border: 1px solid var(--line); border-radius: 26px; background: var(--card); box-shadow: var(--shadow); }
.calculator-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 22px; border-bottom: 1px solid var(--line); }
.calculator-title { display: flex; align-items: center; gap: 12px; }
.calculator-title img { width: 34px; height: 34px; border-radius: 9px; }
.calculator-title strong { display: block; font-size: 14px; letter-spacing: 0.1em; }
.calculator-title small { display: block; margin-top: 2px; color: var(--muted); font-size: 11px; }
.calculator-tabs { display: inline-grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; border-radius: 12px; background: var(--paper); }
.calculator-tabs button { min-width: 100px; border: 0; border-radius: 9px; background: transparent; padding: 9px 13px; color: var(--muted); font-size: 12px; font-weight: 800; }
.calculator-tabs button.is-active { background: var(--card); color: var(--ink); box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08); }
.calculator-panel { display: grid; grid-template-columns: 1.05fr 0.95fr; min-height: 480px; }
.calculator-panel[hidden] { display: none; }
.calc-form { padding: 26px; }
.calc-form h2 { margin: 0; font-size: 24px; letter-spacing: -0.025em; }
.calc-form > p { margin: 8px 0 22px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 7px; color: var(--muted); font-size: 12px; font-weight: 750; }
.input-with-unit { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); padding: 0 12px; transition: border-color 180ms ease, box-shadow 180ms ease; }
.input-with-unit:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(47, 104, 142, 0.12); }
.input-with-unit input { min-width: 0; height: 48px; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 17px; font-weight: 760; font-variant-numeric: tabular-nums; }
.input-with-unit span { color: var(--muted); font-size: 11px; font-weight: 750; }
.calc-note { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.65; }
.result-card { position: relative; display: flex; flex-direction: column; justify-content: space-between; overflow: hidden; background: var(--blue-dark); padding: 28px; color: #fff; }
.result-card::after { position: absolute; right: -50px; bottom: -70px; width: 230px; height: 230px; border: 1px solid rgba(255,255,255,0.14); border-radius: 50%; box-shadow: 0 0 0 36px rgba(255,255,255,0.035), 0 0 0 74px rgba(255,255,255,0.025); content: ""; }
.result-label { position: relative; z-index: 1; margin: 0; color: rgba(255,255,255,0.62); font-size: 11px; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; }
.result-primary { position: relative; z-index: 1; margin: 10px 0 28px; font-size: clamp(34px, 4vw, 52px); line-height: 1; font-weight: 900; letter-spacing: -0.04em; font-variant-numeric: tabular-nums; }
.result-list { position: relative; z-index: 1; display: grid; gap: 0; margin: 0; }
.result-list div { display: flex; justify-content: space-between; gap: 18px; padding: 14px 0; border-top: 1px solid rgba(255,255,255,0.14); }
.result-list dt { color: rgba(255,255,255,0.62); font-size: 12px; }
.result-list dd { margin: 0; text-align: right; font-size: 13px; font-weight: 800; font-variant-numeric: tabular-nums; }
.result-status { position: relative; z-index: 1; min-height: 36px; margin: 24px 0 0; color: rgba(255,255,255,0.62); font-size: 11px; line-height: 1.55; }
.result-status[data-state="error"] { color: #ffc6bd; }

.app-promo { overflow: hidden; background: var(--blue-dark); color: #fff; }
.promo-hero { display: grid; grid-template-columns: 0.85fr 1.15fr; align-items: center; gap: 72px; min-height: 760px; padding: 100px 0; }
.promo-hero h2 { max-width: 650px; margin: 0; font-size: clamp(50px, 7vw, 92px); line-height: 0.98; letter-spacing: -0.055em; font-weight: 900; }
.promo-lead { max-width: 570px; margin: 28px 0 0; color: rgba(255,255,255,0.67); font-size: 17px; line-height: 1.8; }
.promo-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.app-store-link { display: inline-flex; min-height: 54px; align-items: center; gap: 11px; border-radius: 12px; background: #fff; padding: 8px 18px; color: var(--blue-dark); text-decoration: none; transition: background 180ms ease; }
.app-store-link:hover { background: var(--blue-soft); }
.app-store-link svg { width: 25px; height: 25px; }
.app-store-link span { display: grid; font-size: 15px; font-weight: 850; line-height: 1.05; }
.app-store-link small { font-size: 9px; font-weight: 700; letter-spacing: 0.05em; }
.text-link-light { display: inline-flex; align-items: center; color: rgba(255,255,255,0.78); font-size: 13px; font-weight: 800; text-decoration: none; }
.text-link-light:hover { color: #fff; }
.promo-note { margin: 16px 0 0; color: rgba(255,255,255,0.45); font-size: 11px; }
.device-stage { position: relative; min-height: 610px; }
.device-stage::before { position: absolute; inset: 10% 0 0 10%; border-radius: 50%; background: radial-gradient(circle, rgba(75,137,178,0.45), transparent 65%); filter: blur(20px); content: ""; }
.phone-frame { position: absolute; overflow: hidden; border: 8px solid #0a1117; border-radius: 38px; background: #fff; box-shadow: 0 28px 70px rgba(0,0,0,0.34); }
.phone-frame img { width: 100%; height: 100%; object-fit: cover; }
.phone-main { z-index: 3; right: 16%; top: 0; width: 300px; aspect-ratio: 1290 / 2796; }
.phone-left { z-index: 1; left: 0; top: 122px; width: 225px; aspect-ratio: 1290 / 2796; transform: rotate(-7deg); opacity: 0.88; }
.phone-right { z-index: 2; right: -2%; top: 168px; width: 220px; aspect-ratio: 1290 / 2796; transform: rotate(7deg); opacity: 0.92; }

.feature-section { padding: 110px 0 120px; background: #eef1f2; color: var(--ink); }
.section-heading { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 50px; align-items: end; margin-bottom: 48px; }
.section-heading h2 { margin: 0; font-size: clamp(44px, 6vw, 76px); line-height: 1.03; letter-spacing: -0.05em; }
.section-heading p:last-child { max-width: 560px; justify-self: end; margin: 0 0 8px; color: var(--muted); font-size: 16px; line-height: 1.8; }
.feature-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 18px; }
.feature-card { position: relative; min-height: 360px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 34px; }
.feature-card-wide { grid-row: span 2; min-height: 738px; background: var(--blue-soft); }
.feature-card-dark { background: var(--blue-dark); color: #fff; }
.feature-card-accent { background: var(--orange-soft); }
.feature-number { color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: 0.14em; }
.feature-card-dark .feature-number { color: #8dc3e5; }
.feature-card h3 { max-width: 520px; margin: 18px 0 12px; font-size: clamp(28px, 3.1vw, 44px); line-height: 1.08; letter-spacing: -0.035em; }
.feature-card p { max-width: 500px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.feature-card-dark p { color: rgba(255,255,255,0.64); }
.feature-card .mini-screen { position: absolute; right: 34px; bottom: -150px; width: 300px; border: 7px solid #121a20; border-radius: 34px; box-shadow: 0 24px 55px rgba(16,40,59,0.22); }
.feature-card-wide .mini-screen { right: 50%; bottom: -170px; width: 330px; transform: translateX(50%); }
.feature-card-accent::after { position: absolute; right: -45px; bottom: -45px; width: 190px; height: 190px; border: 2px solid rgba(213,138,54,0.5); border-radius: 50%; box-shadow: 0 0 0 28px rgba(213,138,54,0.1); content: ""; }

.privacy-strip { padding: 92px 0; background: #fff; }
.privacy-grid { display: grid; grid-template-columns: 0.78fr 1.22fr; gap: 70px; align-items: start; }
.privacy-grid h2 { margin: 0; font-size: clamp(40px, 5vw, 66px); line-height: 1.03; letter-spacing: -0.045em; }
.privacy-points { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 36px; }
.privacy-point { padding-top: 16px; border-top: 1px solid var(--line-strong); }
.privacy-point strong { display: block; font-size: 15px; }
.privacy-point p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.closing { padding: 95px 0; background: var(--orange); color: #17120c; }
.closing-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center; }
.closing h2 { margin: 0; font-size: clamp(46px, 6vw, 76px); line-height: 0.98; letter-spacing: -0.05em; }
.closing-copy { max-width: 500px; justify-self: end; }
.closing-copy p { margin: 0 0 24px; font-size: 16px; line-height: 1.8; }
.closing .primary-link { background: #17120c; color: #fff; }

.site-footer { padding: 30px 0 38px; border-top: 1px solid rgba(255,255,255,0.13); background: #0a1b29; color: rgba(255,255,255,0.72); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.footer-brand { display: grid; gap: 4px; }
.footer-brand strong { color: #fff; font-size: 13px; letter-spacing: 0.12em; }
.footer-brand small { font-size: 11px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-links a { font-size: 11px; font-weight: 700; text-decoration: none; }
.footer-links a:hover { color: #fff; }

.legal-main { min-height: calc(100vh - 72px); padding: 70px 0 100px; }
.legal-layout { display: grid; grid-template-columns: minmax(240px, 0.42fr) minmax(0, 1fr); gap: 72px; align-items: start; }
.legal-intro { position: sticky; top: 112px; }
.legal-intro .eyebrow { margin-bottom: 14px; }
.legal-intro h1 { margin: 0; font-size: clamp(42px, 5vw, 66px); line-height: 1; letter-spacing: -0.05em; }
.legal-intro p { margin: 20px 0 0; color: var(--muted); font-size: 13px; line-height: 1.75; }
.legal-card { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: clamp(28px, 5vw, 62px); box-shadow: var(--shadow); }
.legal-card section + section { margin-top: 42px; padding-top: 42px; border-top: 1px solid var(--line); }
.legal-card h2 { margin: 0 0 14px; font-size: 23px; letter-spacing: -0.02em; }
.legal-card h3 { margin: 24px 0 8px; font-size: 16px; }
.legal-card p, .legal-card li { color: #41474c; font-size: 14px; line-height: 1.85; }
.legal-card p { margin: 0; }
.legal-card p + p { margin-top: 12px; }
.legal-card ul, .legal-card ol { margin: 12px 0 0; padding-left: 1.3em; }
.legal-card a { color: var(--blue); font-weight: 750; text-underline-offset: 3px; }
.notice-box { margin: 26px 0 0; border-left: 4px solid var(--orange); background: var(--orange-soft); padding: 18px 20px; }
.notice-box strong { display: block; margin-bottom: 5px; }
.support-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.support-actions .primary-link { color: #fff; }
.faq-list { display: grid; gap: 10px; }
.faq-list details { border: 1px solid var(--line); border-radius: 14px; background: var(--paper); }
.faq-list summary { cursor: pointer; padding: 18px 20px; font-size: 14px; font-weight: 800; }
.faq-list details p { padding: 0 20px 20px; }

@media (max-width: 1060px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; }
  .calculator-shell { max-width: 820px; }
  .promo-hero { grid-template-columns: 1fr; }
  .device-stage { width: min(720px, 100%); margin-inline: auto; }
  .phone-main { right: 28%; }
  .section-heading, .privacy-grid { grid-template-columns: 1fr; gap: 26px; }
  .section-heading p:last-child { justify-self: start; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, var(--container)); }
  .header-inner { min-height: 64px; }
  .brand-wordmark small { display: none; }
  .site-nav a:not(.language-link) { display: none; }
  .site-nav .language-link { padding-left: 0; border-left: 0; }
  .calculator-hero { padding: 48px 0 64px; }
  .hero-copy h1 { font-size: clamp(44px, 15vw, 66px); }
  .hero-lead { font-size: 16px; }
  .hero-grid { gap: 42px; }
  .calculator-head { align-items: flex-start; flex-direction: column; }
  .calculator-tabs { width: 100%; }
  .calculator-tabs button { min-width: 0; }
  .calculator-panel { grid-template-columns: 1fr; }
  .field-grid { grid-template-columns: 1fr; }
  .result-card { min-height: 360px; }
  .promo-hero { min-height: auto; padding: 82px 0 60px; }
  .promo-hero h2 { font-size: clamp(48px, 14vw, 70px); }
  .device-stage { min-height: 510px; margin-top: 22px; }
  .phone-main { right: 20%; width: 230px; }
  .phone-left { top: 110px; width: 175px; }
  .phone-right { right: -8%; top: 145px; width: 170px; }
  .feature-section { padding: 78px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card, .feature-card-wide { grid-row: auto; min-height: 560px; }
  .feature-card-dark, .feature-card-accent { min-height: 330px; }
  .feature-card .mini-screen { width: 260px; }
  .privacy-strip { padding: 70px 0; }
  .privacy-points { grid-template-columns: 1fr; }
  .closing-grid { grid-template-columns: 1fr; }
  .closing-copy { justify-self: start; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .legal-main { padding: 46px 0 72px; }
  .legal-layout { grid-template-columns: 1fr; gap: 28px; }
  .legal-intro { position: static; }
  .legal-card { padding: 26px 22px; }
}

@media (max-width: 390px) {
  .hero-actions, .support-actions { align-items: stretch; flex-direction: column; }
  .primary-link, .secondary-link { width: 100%; }
  .calc-form, .result-card { padding: 22px; }
  .phone-main { right: 14%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}