/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0f0f0f;
  --bg-secondary: #161616;
  --text: #e8e8e8;
  --text-muted: #888;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.12);
  --border: #222;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
}

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}
a:hover { opacity: 0.75; }

/* ===== LAYOUT ===== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* ===== HEADER ===== */
header {
  border-bottom: 1px solid var(--border);
  padding: 2rem 0;
}

.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}
.site-name span {
  color: var(--accent);
}

.site-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

nav {
  display: flex;
  gap: 1.5rem;
}
nav a {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
nav a:hover { color: var(--accent); opacity: 1; }

/* ===== MAIN ===== */
main {
  flex: 1;
  padding: 3rem 0;
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ===== ARTICLE LIST (homepage) ===== */
.article-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.article-card {
  border-bottom: 1px solid var(--border);
  padding-bottom: 2.5rem;
}
.article-card:last-child {
  border-bottom: none;
}

.article-card .meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.article-card h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.article-card h2 a {
  color: inherit;
}
.article-card h2 a:hover {
  color: var(--accent);
  opacity: 1;
}

.article-card .excerpt {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.read-more {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

/* ===== ARTICLE PAGE ===== */
.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.article-header .meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.article-header h1 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 400;
  line-height: 1.25;
  color: var(--text);
}

/* ===== PROSE ===== */
.prose {
  font-size: 1rem;
  line-height: 1.85;
  color: #d0d0d0;
}

.prose p {
  margin-bottom: 1.5rem;
}

.prose strong {
  color: var(--text);
  font-weight: 600;
}

.prose em {
  font-style: italic;
  color: var(--text-muted);
}

.prose h2, .prose h3 {
  font-family: var(--font-serif);
  color: var(--text);
  margin: 2rem 0 1rem;
  font-weight: 400;
}

.prose blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1.5rem;
  margin: 2rem 0;
  color: var(--text-muted);
  font-style: italic;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.firma {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ===== CHI SONO ===== */
.bio-section {
  max-width: 600px;
}
.bio-section h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  color: var(--text);
}
.bio-section p {
  color: #c0c0c0;
  margin-bottom: 1.2rem;
  line-height: 1.8;
}
.bio-tag {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.78rem;
  margin: 0.2rem;
  letter-spacing: 0.04em;
}

/* ===== PAGE INTRO ===== */
.page-intro {
  margin-bottom: 3rem;
}
.page-intro h1 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.page-intro p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== BACK LINK ===== */
.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.back-link:hover { color: var(--accent); opacity: 1; }

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  html { font-size: 16px; }
  .header-inner { flex-direction: column; }
  .article-header h1 { font-size: 1.7rem; }
}