/* Our Soil — 公式サイト Phase 1 デザインシステム
 * 究極のシンプル × こだわり
 * Shippori Mincho B1 単体 / ペーパーホワイト × 墨 / 焦げ茶アクセント控えめ
 * 2026-05-03 GUILLERMO 実装 / 統合4レビュー反映
 */

:root {
  --color-bg: #F8F7F2;
  --color-fg: #1A1A1A;
  --color-fg-soft: #4A4A4A;
  --color-fg-mute: #8A8A85;
  --color-accent: #3D2914;
  --color-line: #E8E4D9;

  --font-main: 'Shippori Mincho B1', 'Hiragino Mincho ProN', 'Yu Mincho', 'YuMincho', serif;

  --fs-body: 1.0625rem;
  --fs-body-pc: 1.1875rem;
  --fs-h1: clamp(2.25rem, 5.5vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.125rem);
  --fs-small: 0.9375rem;

  --leading: 1.85;
  --leading-tight: 1.4;

  --space-section: clamp(4rem, 10vw, 8rem);
  --space-paragraph: 1.5rem;
  --container-max: 720px;
  --container-wide: 1024px;
}

* { box-sizing: border-box; }
*::before, *::after { box-sizing: border-box; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  font-family: var(--font-main);
  font-size: var(--fs-body);
  line-height: var(--leading);
  color: var(--color-fg);
  background-color: var(--color-bg);
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  opacity: 0;
  animation: fadein 200ms ease forwards;
}

@keyframes fadein {
  to { opacity: 1; }
}

@media (min-width: 768px) {
  body { font-size: var(--fs-body-pc); }
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
  color: var(--color-fg);
  /* 日本語見出し: 文節単位で折り返し (Chrome 119+ BudouX) + 行末 orphan 軽減 */
  word-break: auto-phrase;
  overflow-wrap: anywhere;
  text-wrap: pretty;
  line-break: strict;
}
@supports not (word-break: auto-phrase) {
  h1, h2, h3, h4 { word-break: keep-all; }
}

h1 { font-size: var(--fs-h1); margin-bottom: 1.5rem; }
h2 { font-size: var(--fs-h2); margin-bottom: 1.25rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }

p { margin: 0 0 var(--space-paragraph); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 var(--space-paragraph); padding-left: 1.5rem; }
ul li, ol li { margin-bottom: 0.75rem; line-height: var(--leading); }

a {
  color: var(--color-fg);
  text-decoration: underline;
  text-decoration-color: var(--color-line);
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 100ms ease, color 100ms ease;
}
a:hover { text-decoration-color: var(--color-accent); color: var(--color-accent); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; border-radius: 2px; }

em { font-style: italic; color: var(--color-fg-soft); }
strong { font-weight: 600; }

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.container--wide { max-width: var(--container-wide); }

/* Section */
section { padding: var(--space-section) 0; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  z-index: 10;
  padding: 1rem 0;
}
.site-header .container {
  max-width: var(--container-wide);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.brand {
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.01em;
}
.brand:hover { color: var(--color-accent); }
.site-header nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.site-header nav a {
  font-size: var(--fs-small);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.site-header nav a:hover { color: var(--color-accent); }

@media (max-width: 600px) {
  .site-header nav { gap: 1rem; }
  .site-header nav a { font-size: 0.875rem; }
  .brand { font-size: 0.9375rem; }
}

/* Hero */
.hero {
  padding-top: clamp(5rem, 12vw, 9rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}
.hero h1 {
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}

/* Atomic Answer */
.atomic-answer {
  border-left: 3px solid var(--color-accent);
  padding: 0.25rem 0 0.25rem 1.5rem;
  margin: 2rem 0;
  font-size: 1.0625em;
  line-height: 1.75;
  color: var(--color-fg-soft);
}

/* Numbers */
.numbers-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 2rem 1.5rem;
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}
.numbers-list li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0;
  padding: 1.25rem 0;
  border-top: 1px solid var(--color-line);
}
.numbers-list .num {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
}
.numbers-list .unit {
  font-size: 0.875rem;
  color: var(--color-fg-mute);
  margin-top: 0.5rem;
}
.numbers-list .label {
  font-size: var(--fs-small);
  color: var(--color-fg-soft);
  margin-top: 0.5rem;
}

/* Not-doing */
.not-doing ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.not-doing li {
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-line);
  margin: 0;
}
.not-doing li:last-child { border-bottom: 1px solid var(--color-line); }

/* Ladder table */
.ladder {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}
.ladder th, .ladder td {
  padding: 1rem 0.75rem;
  border-top: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
  font-weight: 400;
  line-height: 1.6;
}
.ladder tr:last-child td, .ladder tr:last-child th { border-bottom: 1px solid var(--color-line); }
.ladder th {
  width: 4rem;
  color: var(--color-accent);
  font-weight: 600;
  white-space: nowrap;
}
.ladder td:last-child {
  width: 9rem;
  font-size: var(--fs-small);
  color: var(--color-fg-soft);
  white-space: nowrap;
  text-align: right;
}

@media (max-width: 600px) {
  .ladder th { width: 3.5rem; }
  .ladder td:last-child { width: auto; font-size: 0.875rem; }
}

.footnote {
  font-size: var(--fs-small);
  color: var(--color-fg-mute);
  margin-top: 1.5rem;
}

/* Patterns callout */
.patterns-callout {
  padding-top: clamp(2.5rem, 6vw, 4rem);
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
}

/* Founder excerpt */
.founder-excerpt p { margin-bottom: 1.25rem; }
.founder-excerpt p:last-of-type { margin-top: 2rem; }

/* About page biography */
.bio {
  padding-top: clamp(4rem, 8vw, 6rem);
  padding-bottom: clamp(4rem, 8vw, 6rem);
}
.bio p { line-height: 1.78; }
.bio em {
  color: var(--color-accent);
  font-style: italic;
}
.bio h2 {
  margin-top: clamp(3rem, 6vw, 5rem);
  letter-spacing: -0.01em;
}
.bio table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 var(--space-paragraph);
  font-size: var(--fs-small);
}
.bio table th, .bio table td {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
  font-weight: 400;
  line-height: 1.6;
}
.bio table tr:last-child th, .bio table tr:last-child td { border-bottom: 1px solid var(--color-line); }
.bio table th {
  white-space: nowrap;
  color: var(--color-fg-mute);
  width: 5rem;
}

.faq {
  margin: 2rem 0;
}
.faq details {
  border-top: 1px solid var(--color-line);
  padding: 1.25rem 0;
}
.faq details:last-child { border-bottom: 1px solid var(--color-line); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  padding-right: 2rem;
  position: relative;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::marker { display: none; content: ""; }
.faq details > summary { list-style: none; list-style-image: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--color-fg-mute);
  transition: transform 200ms ease;
}
.faq details[open] summary::after { content: "−"; }
.faq details[open] { padding-bottom: 1.5rem; }
.faq .answer {
  margin-top: 1rem;
  color: var(--color-fg-soft);
  line-height: var(--leading);
}

/* Contact */
.contact { padding-top: clamp(4rem, 8vw, 6rem); padding-bottom: clamp(4rem, 8vw, 6rem); }
.contact .btn-primary {
  display: inline-block;
  padding: 1.125rem 2rem;
  border: 1px solid var(--color-fg);
  background: transparent;
  color: var(--color-fg);
  text-decoration: none;
  min-height: 44px;
  font-family: inherit;
  font-size: var(--fs-body);
  letter-spacing: 0.01em;
  transition: background 200ms ease, color 200ms ease;
  margin-top: 1.5rem;
}
.contact .btn-primary:hover {
  background: var(--color-fg);
  color: var(--color-bg);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 3rem 0 2.5rem;
  font-size: var(--fs-small);
  color: var(--color-fg-soft);
}
.site-footer .container { max-width: var(--container-wide); }
.footer-org {
  line-height: 1.85;
  margin: 0 0 1.5rem;
}
.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}
.footer-nav li { margin: 0; }
.footer-nav a {
  text-decoration: none;
  font-size: var(--fs-small);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.footer-nav a:hover { color: var(--color-accent); }
.copyright {
  font-size: 0.8125rem;
  color: var(--color-fg-mute);
  margin: 0;
}

/* Legal documents (privacy, etc.) */
.legal-doc {
  padding-top: clamp(4rem, 8vw, 6rem);
  padding-bottom: clamp(4rem, 8vw, 6rem);
}
.legal-doc h1 { margin-bottom: 0.5rem; }
.legal-doc h2 {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  font-size: 1.25rem;
}
.legal-doc .updated {
  font-size: var(--fs-small);
  color: var(--color-fg-mute);
  margin-bottom: 2rem;
}

/* Examples — pricing & scope */
.examples-intro {
  padding-top: clamp(4rem, 8vw, 6rem);
  padding-bottom: clamp(2rem, 5vw, 3rem);
}
.examples-intro .lede {
  font-size: 1.125em;
  color: var(--color-fg-soft);
  line-height: 1.78;
  margin: 1.5rem 0;
}
.examples-intro .note {
  font-size: var(--fs-small);
  color: var(--color-fg-mute);
}

.examples-cat {
  padding-top: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--color-line);
}
.examples-cat .cat-intro {
  color: var(--color-fg-soft);
  margin-bottom: 2rem;
}

.plan {
  padding: 2rem 0;
  border-top: 1px solid var(--color-line);
}
.plan:last-of-type { border-bottom: 1px solid var(--color-line); }
.plan-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: -0.005em;
}
.plan-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: var(--fs-small);
  color: var(--color-fg-soft);
  margin-bottom: 1.25rem;
  min-width: 0;
}
.plan-meta > span {
  min-width: 0;
  word-break: normal;
  overflow-wrap: anywhere;
}
.plan-meta .key {
  color: var(--color-fg-mute);
  margin-right: 0.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}
.plan-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem 2rem;
  margin: 1rem 0 1.25rem;
}
@media (max-width: 600px) {
  .plan-body { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
}
.plan-col {
  min-width: 0;
}
.plan-col-head {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-fg-mute);
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}
.plan-col ul {
  margin: 0;
  padding-left: 1.25rem;
  list-style: disc;
}
.plan-col li {
  font-size: var(--fs-small);
  line-height: 1.7;
  margin-bottom: 0.375rem;
  overflow-wrap: anywhere;
}
.plan-target {
  font-size: var(--fs-small);
  color: var(--color-fg-soft);
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-line);
  overflow-wrap: anywhere;
  margin: 0;
}
.plan-target .key {
  color: var(--color-fg-mute);
  margin-right: 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.examples-decline ul,
.examples-faq dl {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}
.examples-decline li,
.examples-faq dl > div {
  padding: 1.25rem 0;
  border-top: 1px solid var(--color-line);
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 2fr;
  gap: 1rem 1.5rem;
}
.examples-decline li:last-child,
.examples-faq dl > div:last-child { border-bottom: 1px solid var(--color-line); }
@media (max-width: 600px) {
  .examples-decline li,
  .examples-faq dl > div { grid-template-columns: minmax(0, 1fr); gap: 0.5rem; }
}
.examples-decline .what,
.examples-faq dt {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.005em;
}
.examples-decline .why,
.examples-faq dd {
  font-size: var(--fs-small);
  color: var(--color-fg-soft);
  line-height: 1.78;
  margin: 0;
}

.fine-print {
  padding: 2rem 0 1rem;
  border-top: 1px solid var(--color-line);
  font-size: 0.8125rem;
  color: var(--color-fg-mute);
  line-height: 1.85;
}
.fine-print p { margin: 0 0 0.5rem; }

/* Newsletter LP */
.nl-hero {
  padding-top: clamp(5rem, 12vw, 9rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}
.nl-label {
  font-size: var(--fs-small);
  color: var(--color-fg-mute);
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}
.nl-hook {
  font-size: 1.125em;
  line-height: 1.78;
  color: var(--color-fg-soft);
  border-left: 3px solid var(--color-accent);
  padding: 0.25rem 0 0.25rem 1.5rem;
  margin: 2rem 0;
}
.nl-meta {
  list-style: none;
  padding: 0;
  margin: 0 0 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.nl-meta li {
  font-size: var(--fs-small);
  color: var(--color-fg-soft);
  margin: 0;
  padding-left: 1rem;
  position: relative;
}
.nl-meta li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-fg-mute);
}
.nl-form-area {
  padding: 2rem 0;
  border-top: 1px solid var(--color-line);
}
.nl-form-placeholder {
  color: var(--color-fg-mute);
  font-size: var(--fs-small);
  margin: 0;
}
.nl-magnet,
.nl-arc,
.nl-from {
  padding-top: clamp(3rem, 7vw, 5rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
  border-top: 1px solid var(--color-line);
}
.nl-arc-list {
  margin: 1.5rem 0;
  padding-left: 1.75rem;
}
.nl-arc-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-line);
  margin: 0;
  font-size: var(--fs-small);
  line-height: var(--leading);
}
.nl-arc-list li:first-child { border-top: 1px solid var(--color-line); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}