/* ===== Thought Journal Base Styles ===== */

:root {
  --color-page: #fbfaf7;
  --color-surface: #ffffff;
  --color-text: #1f1f1d;
  --color-muted: #6c6962;
  --color-subtle: #f0eee8;
  --color-border: #dedbd2;
  --color-accent: #8c6f3f;
  --color-link: #315f6b;
  --font-serif: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", serif;
  --font-sans: "Hiragino Sans", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  --content-width: 720px;
  --wide-width: 1040px;
  --space-page-x: clamp(20px, 5vw, 48px);
}

[data-theme="dark"] {
  --color-page: #171715;
  --color-surface: #20201d;
  --color-text: #f0eee8;
  --color-muted: #b9b4aa;
  --color-subtle: #2b2a26;
  --color-border: #464238;
  --color-accent: #d5b878;
  --color-link: #9ec5ce;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-page);
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.9;
  overflow-wrap: anywhere;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-accent);
}

button,
input,
textarea,
select {
  font: inherit;
}

.site-shell {
  min-height: 100vh;
}

.site-header,
.site-footer {
  padding-inline: var(--space-page-x);
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(251, 250, 247, 0.92);
}

[data-theme="dark"] .site-header {
  background: rgba(23, 23, 21, 0.92);
}

.site-header-inner,
.site-footer-inner,
.wide-container {
  width: min(100%, var(--wide-width));
  margin-inline: auto;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.site-title {
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.site-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--font-sans);
  font-size: 14px;
}

.site-nav a {
  color: var(--color-muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-text);
}

.theme-toggle,
.tag-filter {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
  font-family: var(--font-sans);
  line-height: 1.4;
}

.theme-toggle {
  min-width: 64px;
  min-height: 34px;
  padding: 6px 12px;
  font-size: 12px;
}

.theme-toggle:hover,
.theme-toggle[aria-pressed="true"],
.tag-filter:hover,
.tag-filter[aria-pressed="true"] {
  border-color: var(--color-accent);
  color: var(--color-text);
}

.page-main {
  padding: clamp(48px, 8vw, 96px) var(--space-page-x);
}

.content-container {
  width: min(100%, var(--content-width));
  margin-inline: auto;
}

.eyebrow {
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-title {
  margin: 12px 0 24px;
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
}

.lead {
  color: var(--color-muted);
  font-size: clamp(17px, 2.4vw, 20px);
  line-height: 1.9;
}

.page-hero {
  padding-bottom: clamp(40px, 7vw, 72px);
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.75fr);
  align-items: center;
  gap: clamp(40px, 7vw, 88px);
  min-height: calc(100vh - 160px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.home-hero-copy {
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  margin-top: 34px;
  font-family: var(--font-sans);
  font-size: 14px;
}

.text-link {
  color: var(--color-text);
  font-weight: 700;
  text-decoration: none;
}

.text-link::after {
  content: " ->";
  color: var(--color-accent);
}

.text-link:hover {
  color: var(--color-link);
}

.journal-visual {
  position: relative;
  z-index: 0;
  min-height: 420px;
  margin: 0;
}

.journal-paper {
  position: absolute;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: 0 24px 60px rgba(31, 31, 29, 0.08);
}

.journal-paper-main {
  inset: 44px 18px 28px 34px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 18px;
  padding: 34px;
  z-index: 2;
}

.journal-paper-main::before {
  content: "";
  position: absolute;
  inset: 26px 26px auto auto;
  width: 72px;
  height: 72px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 48%, var(--color-border) 48%, var(--color-border) 52%, transparent 52%),
    linear-gradient(0deg, transparent 48%, var(--color-border) 48%, var(--color-border) 52%, transparent 52%);
}

.journal-paper-back {
  top: 0;
  right: 0;
  width: 62%;
  height: 44%;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 22px;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: rotate(4deg);
  z-index: 0;
}

.journal-paper-side {
  left: 0;
  bottom: 0;
  width: 46%;
  height: 34%;
  display: flex;
  align-items: flex-end;
  padding: 22px;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-subtle);
  z-index: 1;
}

.journal-paper-label {
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.journal-line {
  display: block;
  width: 76%;
  height: 1px;
  background: var(--color-border);
}

.journal-line-wide {
  width: 100%;
}

.journal-line-short {
  width: 48%;
}

.section-block {
  padding-block: clamp(40px, 7vw, 72px);
  border-top: 1px solid var(--color-border);
}

.section-title {
  margin: 0 0 24px;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.35;
}

.article-list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-card {
  padding: 22px 0;
  border-bottom: 1px solid var(--color-border);
}

.article-list-detailed .article-card {
  padding-block: 28px;
}

.article-card p {
  margin: 0;
  color: var(--color-muted);
}

.article-card-title {
  margin: 0 0 8px;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.45;
}

.article-card-title a {
  color: var(--color-text);
  text-decoration: none;
}

.article-card-title a:hover {
  color: var(--color-link);
}

.article-meta {
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 13px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  font-family: var(--font-sans);
  font-size: 12px;
}

.article-tags span {
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  padding: 3px 9px;
}

.tag-filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}

.tag-filter {
  min-height: 32px;
  padding: 5px 11px;
  font-size: 12px;
}

.empty-note {
  margin: 0;
  padding: 22px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
  list-style: none;
}

.comparison-list {
  display: grid;
  gap: 22px;
  margin: 0;
}

.comparison-item {
  padding-block: 20px;
  border-top: 1px solid var(--color-border);
}

.comparison-item:last-child {
  border-bottom: 1px solid var(--color-border);
}

.comparison-item dt {
  margin-bottom: 8px;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
}

.comparison-item dd {
  margin: 0;
  color: var(--color-muted);
}

.theme-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.theme-list li {
  padding-left: 18px;
  border-left: 2px solid var(--color-border);
  color: var(--color-muted);
}

.page-link-row {
  margin-top: 28px;
  font-family: var(--font-sans);
  font-size: 14px;
}

.prose {
  width: min(100%, var(--content-width));
  margin-inline: auto;
}

.prose h1,
.prose h2,
.prose h3 {
  line-height: 1.45;
}

.prose h1 {
  margin: 0 0 32px;
  font-size: clamp(31px, 5.5vw, 54px);
}

.prose h2 {
  margin: 56px 0 18px;
  font-size: clamp(24px, 4vw, 34px);
}

.prose p {
  margin: 0 0 1.45em;
}

.prose blockquote {
  margin: 36px 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--color-accent);
  color: var(--color-muted);
}

.article-header {
  margin-bottom: clamp(34px, 6vw, 56px);
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}

.article-page .lead {
  margin-bottom: 1.6em;
  color: var(--color-text);
}

.toc-block {
  margin: 0 0 clamp(34px, 6vw, 52px);
  padding: 18px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.toc-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 1.4em;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.7;
}

.toc-list a {
  color: var(--color-muted);
  text-decoration: none;
}

.toc-list a:hover {
  color: var(--color-link);
}

.article-footer {
  margin-top: clamp(44px, 7vw, 72px);
  padding-top: 26px;
  border-top: 1px solid var(--color-border);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 13px;
}

.site-footer-inner {
  padding-block: 28px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 720px) {
  body {
    line-height: 1.85;
  }

  .page-main {
    padding-top: 40px;
    padding-bottom: 64px;
  }

  .home-hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 24px;
    padding-bottom: 40px;
  }

  .journal-visual {
    min-height: 260px;
  }

  .journal-paper-main {
    inset: 28px 8px 18px 22px;
    padding: 26px;
  }

  .site-header-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
    padding-block: 16px;
  }

  .site-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .site-nav {
    flex-wrap: wrap;
    gap: 12px 18px;
    line-height: 1.5;
  }

  .page-title {
    margin-bottom: 20px;
  }

  .lead {
    font-size: 17px;
  }

  .section-block {
    padding-block: 40px;
  }

  .article-card,
  .article-list-detailed .article-card {
    padding-block: 22px;
  }

  .prose h1 {
    margin-bottom: 24px;
  }

  .prose h2 {
    margin-top: 44px;
  }

  .prose blockquote {
    margin-block: 30px;
    padding-left: 18px;
  }

  .article-header {
    padding-bottom: 24px;
  }
}

@media (max-width: 420px) {
  :root {
    --space-page-x: 18px;
  }

  .site-title {
    font-size: 17px;
  }

  .site-nav {
    font-size: 13px;
  }

  .page-title {
    font-size: 31px;
  }

  .section-title,
  .prose h2 {
    font-size: 24px;
  }

  .article-card-title {
    font-size: 20px;
  }

  .journal-paper-main {
    inset: 24px 8px 16px 18px;
    gap: 14px;
    padding: 22px;
  }
}