/* ============================================================
   fktr journal — 共通スタイルシート
   Web表現実験記録サイト
   ============================================================ */

/* ============================================================
   1. Design Tokens + Reset + Body
   ============================================================ */

:root {
  --color-ground:    #f5f0e8;
  --color-parchment: #ece6d9;
  --color-sepia:     #8b7355;
  --color-body:      #5a4a3a;
  --color-ink:       #1a1a1a;
  --color-crimson:   #D42B2B;
  --color-rule:      #ddd5c0;
  --color-white:     #fff;
  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", Georgia, serif;
  --font-sans:  "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  --font-mono:  "SF Mono", "Fira Code", "Consolas", monospace;
  --measure:      680px;
  --reading-size: 18px;
  --leading:      1.85;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; }

body {
  background: var(--color-ground);
  color: var(--color-ink);
  font-family: var(--font-serif);
  font-size: var(--reading-size);
  line-height: var(--leading);
  font-feature-settings: "palt" 1;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }


/* ============================================================
   2. Site Header
   ============================================================ */

.site-header {
  border-bottom: 2px solid var(--color-ink);
  padding: 12px 24px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  background: var(--color-ground);
}

.logo-main {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-ink);
  letter-spacing: 0.01em;
}

.logo-sub {
  font-family: var(--font-sans);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-crimson);
  text-transform: uppercase;
}

.site-nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-sepia);
}

.site-nav a:hover { color: var(--color-ink); }


/* ============================================================
   3. Layout
   ============================================================ */

.container {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 24px;
}

.container--wide {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.divider {
  border: none;
  border-top: 1px solid var(--color-rule);
  margin: 3rem 0;
}


/* ============================================================
   4. Article Body
   ============================================================ */

.article-body {
  font-size: var(--reading-size);
  line-height: var(--leading);
  color: var(--color-body);
}

.article-body p { margin-bottom: 1.75em; }

.article-body h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.3;
  margin: 3rem 0 1.5rem;
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-ink);
  margin: 2.5rem 0 1rem;
}


/* ============================================================
   5. Visual Components
   ============================================================ */

/* Pull Quote */
.pullquote {
  border-left: 4px solid var(--color-crimson);
  padding: 1rem 1.5rem;
  margin: 2.5rem 0;
  background: var(--color-white);
}

.pullquote p {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--color-ink);
  margin-bottom: 0;
}

/* Callout */
.callout {
  background: #f0f9ff;
  border-left: 4px solid #0ea5e9;
  border-radius: 0 6px 6px 0;
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}

.callout--sepia {
  background: var(--color-parchment);
  border-left-color: var(--color-sepia);
}

.callout-label {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #0ea5e9;
  margin-bottom: 0.5rem;
}

.callout--sepia .callout-label { color: var(--color-sepia); }

.callout p { font-size: 0.95rem; margin-bottom: 0; }
.callout p + p { margin-top: 0.75em; }

/* Tags */
.tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 2px;
  margin-right: 4px;
  text-transform: uppercase;
}

.tag--crimson { background: var(--color-crimson); color: #fff; }
.tag--ink     { background: var(--color-ink); color: var(--color-ground); }

/* Section Number */
.section-number {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-crimson);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

/* Drop Cap */
.drop-cap::first-letter {
  float: left;
  font-size: 5.2rem;
  line-height: 0.82;
  font-weight: 700;
  color: var(--color-crimson);
  padding-right: 0.12em;
  margin-top: 0.04em;
}

/* Highlight */
mark {
  background: #fef08a;
  color: inherit;
  padding: 0.1em 0.25em;
  border-radius: 2px;
}

/* Code */
pre {
  background: var(--color-ink);
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.65;
  overflow-x: auto;
  margin: 2rem 0;
}

code {
  background: var(--color-parchment);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

pre code { background: none; padding: 0; }

/* Table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
}

.spec-table th {
  text-align: left;
  padding: 0.6rem 1rem;
  background: var(--color-parchment);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  border-bottom: 2px solid var(--color-rule);
}

.spec-table td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--color-rule);
  vertical-align: top;
}

.spec-table tr:last-child td { border-bottom: none; }

.spec-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-crimson);
  font-weight: 700;
}


/* ============================================================
   6. Progress Bar + Footer + Responsive
   ============================================================ */

/* Progress Bar */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--color-crimson);
  z-index: 100;
  transition: width 0.1s linear;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-rule);
  padding: 2rem 24px;
  margin-top: 4rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-sepia);
}

/* Responsive */
@media (max-width: 600px) {
  :root { --reading-size: 17px; }
  .site-header { padding: 10px 16px; }
  .container { padding: 0 16px; }
}