/* ========================================================
   anon / SIM比較メモ
   editorial × refined SaaS — paper-meets-product LP
   ======================================================== */

/* ---- リセット ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans JP", "Inter", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.85;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  font-feature-settings: "palt" 1;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration: none; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 1.5px solid var(--accent);
  outline-offset: 3px;
  border-radius: 1px;
}
p { margin: 0 0 1.2em; }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* ---- 配色: 白 + 黒 + アクセント1色 ---- */
:root {
  --paper: #fefefe;
  --paper-soft: #f6f5f1;
  --ink: #0a0a0a;
  --ink-soft: #2a2a2a;
  --ink-mute: #6b6b6b;
  --rule: #0a0a0a;
  --rule-soft: rgba(10,10,10,0.12);
  --accent: #1e3a5f;
  --accent-soft: rgba(30,58,95,0.08);
  --serif: "Inter", "Noto Sans JP", serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

:root[data-theme="dark"] {
  --paper: #0a0a0a;
  --paper-soft: #141414;
  --ink: #f1efe8;
  --ink-soft: #d6d3ca;
  --ink-mute: #8a8780;
  --rule: #f1efe8;
  --rule-soft: rgba(241,239,232,0.16);
  --accent: #7aa7d9;
  --accent-soft: rgba(122,167,217,0.12);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0a0a0a;
    --paper-soft: #141414;
    --ink: #f1efe8;
    --ink-soft: #d6d3ca;
    --ink-mute: #8a8780;
    --rule: #f1efe8;
    --rule-soft: rgba(241,239,232,0.16);
    --accent: #7aa7d9;
    --accent-soft: rgba(122,167,217,0.12);
  }
}

/* ---- タイポ基準 ---- */
h1, h2, h3, h4 {
  margin: 0;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.015em;
  line-height: 1.25;
}
h1 { font-weight: 900; }
.num, .mono { font-family: var(--mono); font-feature-settings: "tnum" 1; }
em { font-style: normal; color: var(--ink-mute); font-weight: 400; }

.muted { color: var(--ink-mute); }

/* ---- レイアウト ---- */
.container {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- ヘッダー ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--rule-soft);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px 24px;
  max-width: 1080px;
  margin: 0 auto;
}
.brand {
  font-weight: 800;
  font-size: 14px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand em { margin: 0 6px; }
.site-nav {
  margin-left: auto;
  display: flex;
  gap: 22px;
}
.site-nav a {
  font-size: 13px;
  color: var(--ink-mute);
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--ink);
  transition: right .25s ease;
}
.site-nav a:hover::after { right: 0; }
.theme-toggle {
  background: transparent;
  border: 1px solid var(--rule-soft);
  color: var(--ink);
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s ease, color .2s ease;
}
.theme-toggle:hover { border-color: var(--ink); }

/* ---- ヒーロー (左寄せ) ---- */
.hero {
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--rule-soft);
}
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 32px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}
.eyebrow .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.eyebrow .sep { color: var(--rule-soft); }
.hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  letter-spacing: -0.028em;
  line-height: 1.08;
  margin-bottom: 28px;
}
.lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 56ch;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0 0 36px;
  padding: 24px 0;
  border-top: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
}
.hero-stats > div {
  padding: 0 18px;
  border-left: 1px solid var(--rule-soft);
}
.hero-stats > div:first-child { border-left: 0; padding-left: 0; }
.hero-stats dt {
  font-size: 11px;
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-weight: 500;
}
.hero-stats dt small {
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  text-transform: none;
  font-family: "Noto Sans JP", sans-serif;
}
.hero-stats dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.hero-stats .num {
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.hero-stats .unit {
  font-size: 12px;
  color: var(--ink-mute);
  font-family: "Noto Sans JP", sans-serif;
}

.hero-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
  display: flex;
  gap: 12px;
  margin: 0 0 32px;
  flex-wrap: wrap;
}
.hero-meta .sep { color: var(--rule-soft); }

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--ink);
  transition: gap .25s ease;
}
.arrow-link:hover { gap: 16px; }
.arrow-link .arrow {
  display: inline-block;
  transition: transform .25s ease;
}
.arrow-link:hover .arrow { transform: translateX(2px); }

/* ---- セクション (大きな余白) ---- */
.section {
  padding: 120px 0;
  position: relative;
}
.section + .section { border-top: 1px solid var(--rule-soft); }
.section-quiet { background: var(--paper-soft); }
.section-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  margin: 0 0 20px;
  font-weight: 500;
}
.section-num::before {
  content: "—";
  margin-right: 10px;
  color: var(--rule-soft);
}
.section h2 {
  font-size: clamp(30px, 4.4vw, 42px);
  letter-spacing: -0.022em;
  line-height: 1.18;
  margin-bottom: 28px;
  max-width: 22ch;
}
.section-lead {
  color: var(--ink-soft);
  font-size: 16px;
  max-width: 56ch;
  margin-bottom: 56px;
  line-height: 1.85;
}

/* ---- キャリアリスト (テーブルではなくグリッド縦並び) ---- */
.carrier-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule-soft);
}
.carrier {
  padding: 36px 0;
  border-bottom: 1px solid var(--rule-soft);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 32px;
  align-items: start;
}
.carrier-head {
  position: sticky;
  top: 80px;
}
.carrier-name {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin: 0 0 6px;
  color: var(--ink);
}
.carrier-plan {
  font-size: 12px;
  color: var(--ink-mute);
  font-weight: 500;
  display: inline-block;
  margin-left: 4px;
}
.carrier-tag {
  font-size: 13px;
  color: var(--ink-mute);
  margin: 0;
  line-height: 1.6;
}

.carrier-body {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.price-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.price-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 0;
  padding: 6px 0;
  gap: 16px;
}
.price-line .tier {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  font-weight: 500;
}
.price-line .price {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}
.price-line .num {
  font-size: 22px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.price-line .unit {
  font-size: 12px;
  color: var(--ink-mute);
  font-family: "Noto Sans JP", sans-serif;
}
.price-line.emphasis {
  border-top: 1px solid var(--rule-soft);
  padding-top: 12px;
  margin-top: 4px;
}
.price-line.emphasis .num {
  font-size: 34px;
  font-weight: 700;
  color: var(--ink);
}

.carrier-meta {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--rule-soft);
}
.carrier-meta > div {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 4px 0;
  font-size: 13px;
}
.carrier-meta dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
  padding-top: 4px;
}
.carrier-meta dd {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

.source {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--rule-soft);
  font-size: 12px;
  color: var(--ink-mute);
  line-height: 1.7;
}

/* ---- split (整理/向き不向き) ---- */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  border-top: 1px solid var(--rule-soft);
  padding-top: 40px;
}
@media (min-width: 720px) {
  .split { grid-template-columns: 1fr 1fr; gap: 56px; }
}
.split-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
  font-weight: 500;
  display: inline-block;
}
.prose-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.prose-list li {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  padding-left: 16px;
  position: relative;
}
.prose-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.85em;
  width: 8px;
  height: 1px;
  background: var(--ink);
}

.note-text { margin-top: 32px; font-size: 13px; }

/* ---- CTA セクション ---- */
.section-cta { padding-bottom: 140px; }
.section-cta p { font-size: 16px; color: var(--ink-soft); max-width: 50ch; }

.cta-link {
  display: inline-grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 4px 24px;
  margin: 24px 0 16px;
  padding: 20px 0 18px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-weight: 700;
  color: var(--ink);
  position: relative;
  overflow: hidden;
  transition: padding-left .3s ease;
  width: 100%;
  max-width: 520px;
}
.cta-link::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: translateX(-101%);
  transition: transform .35s cubic-bezier(.4,0,.2,1);
  z-index: 0;
}
.cta-link > * { position: relative; z-index: 1; }
.cta-link:hover::before { transform: translateX(0); }
.cta-link:hover { color: var(--paper); padding-left: 16px; }
.cta-link:hover .cta-sub { color: color-mix(in srgb, var(--paper) 70%, transparent); }
.cta-label {
  font-size: 18px;
  letter-spacing: -0.01em;
}
.cta-arrow {
  font-size: 22px;
  grid-row: 1 / 3;
  grid-column: 2;
  transition: transform .3s ease;
}
.cta-link:hover .cta-arrow { transform: translateX(4px); }
.cta-sub {
  font-size: 12px;
  color: var(--ink-mute);
  font-weight: 500;
  letter-spacing: 0;
  font-family: var(--mono);
}

.other-carriers {
  margin-top: 24px;
  border-top: 1px solid var(--rule-soft);
  padding-top: 16px;
  max-width: 520px;
}
.other-carriers summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-mute);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
}
.other-carriers summary::-webkit-details-marker { display: none; }
.other-carriers summary::before {
  content: "+";
  font-family: var(--mono);
  font-weight: 400;
  transition: transform .25s ease;
  display: inline-block;
}
.other-carriers[open] summary::before { transform: rotate(45deg); }
.other-carriers summary:hover { color: var(--ink); }
.link-list {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
}
.link-list li { border-top: 1px solid var(--rule-soft); }
.link-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  padding: 12px 0;
  color: var(--ink-soft);
  transition: color .2s ease, padding-left .25s ease;
}
.link-list a:hover { color: var(--ink); padding-left: 6px; }

/* ---- モバイル固定CTA ---- */
.sticky-cta {
  display: none;
  position: fixed;
  left: 16px; right: 16px;
  bottom: 16px;
  z-index: 40;
  background: var(--ink);
  color: var(--paper);
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 700;
  justify-content: space-between;
  align-items: center;
  border-radius: 2px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.18);
  transition: transform .25s ease;
}
.sticky-cta .arrow { transition: transform .25s ease; }
.sticky-cta:active .arrow { transform: translateX(3px); }
@media (max-width: 720px) {
  .sticky-cta { display: flex; }
  main { padding-bottom: 80px; }
}

/* ---- フッター ---- */
.site-footer {
  border-top: 1px solid var(--rule-soft);
  padding: 56px 0 40px;
  margin-top: 0;
  background: var(--paper);
}
.disclosure {
  border-left: 2px solid var(--ink);
  padding: 4px 0 4px 16px;
  margin-bottom: 32px;
}
.disclosure-tag { margin: 0 0 8px; font-size: 13px; font-family: var(--mono); }
.disclosure p:last-child { margin-bottom: 0; font-size: 13px; line-height: 1.8; }
.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 13px;
  margin-bottom: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--rule-soft);
}
.footer-nav a { color: var(--ink-mute); }
.footer-nav a:hover { color: var(--ink); }
.copy { font-size: 12px; font-family: var(--mono); }

/* ---- アニメーション (fade-in + slide-up) ---- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s cubic-bezier(.4,0,.2,1), transform .7s cubic-bezier(.4,0,.2,1);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- レスポンシブ ---- */
@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .site-nav { display: none; }
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: clamp(34px, 9vw, 44px); }
  .lead { font-size: 16px; margin-bottom: 36px; }
  .hero-stats { grid-template-columns: 1fr; gap: 0; padding: 8px 0; }
  .hero-stats > div {
    border-left: 0;
    border-top: 1px solid var(--rule-soft);
    padding: 14px 0;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
  }
  .hero-stats > div:first-child { border-top: 0; padding-top: 8px; }
  .hero-stats dt { margin: 0; flex-direction: row; align-items: baseline; gap: 8px; }
  .section { padding: 80px 0; }
  .section h2 { font-size: clamp(26px, 7vw, 32px); }
  .section-lead { margin-bottom: 40px; }
  .carrier {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 28px 0;
  }
  .carrier-head { position: static; }
  .price-line.emphasis .num { font-size: 28px; }
  .cta-label { font-size: 16px; }
  .cta-link { max-width: 100%; }
}

/* ---- prefers-reduced-motion 対応 ---- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---- print ---- */
@media print {
  .site-header, .sticky-cta, .theme-toggle { display: none; }
  body { color: #000; background: #fff; }
}