/* ===== CSS Variables (テーマ変更可能) ===== */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-terminal: #0d1117;
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --text-accent: #58a6ff;
  --text-success: #3fb950;
  --text-error: #f85149;
  --text-system: #6e7681;
  --border-color: #21262d;
  --link-color: #58a6ff;
  --link-hover: #79c0ff;
  --terminal-prompt: #3fb950;
  --font-mono: "Courier New", "MS Gothic", monospace;
  --font-body: "Segoe UI", "Hiragino Kaku Gothic Pro", "Noto Sans JP", sans-serif;
}

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

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

/* ===== Site Layout ===== */
.site-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ===== Header ===== */
.site-header {
  text-align: center;
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.site-title {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--text-primary);
}

.site-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* ===== Log List ===== */
.log-list {
  margin-bottom: 3rem;
}

.log-list h2 {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.log-entries {
  list-style: none;
}

.log-entries li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.log-entries li a {
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.log-entries li time {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* ===== Terminal ===== */
.terminal-section {
  margin-top: 2rem;
}

.terminal {
  background: var(--bg-terminal);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.terminal-header {
  background: var(--bg-secondary);
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.5;
}

.terminal-output {
  max-height: 400px;
  overflow-y: auto;
  margin-bottom: 0.5rem;
}

.terminal-line {
  padding: 0.15rem 0;
  white-space: pre-wrap;
  word-break: break-all;
}

.terminal-line.system {
  color: var(--text-system);
}

.terminal-line.error {
  color: var(--text-error);
}

.terminal-line.result {
  color: var(--text-primary);
}

.terminal-line.echo {
  color: var(--text-secondary);
}

.terminal-line .prompt {
  color: var(--terminal-prompt);
}

.terminal-line a {
  color: var(--link-color);
}

.terminal-input-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.terminal-prompt {
  color: var(--terminal-prompt);
  font-weight: bold;
  user-select: none;
}

.terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  caret-color: var(--terminal-prompt);
}

/* ===== Page Content ===== */
.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}

.breadcrumb a {
  color: var(--text-secondary);
}

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

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 400;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.published-at {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-top: 0.3rem;
}

.page-content {
  line-height: 1.8;
}

.page-content h2 {
  font-size: 1.3rem;
  font-weight: 400;
  margin: 2rem 0 0.8rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border-color);
}

.page-content h3 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}

.page-content p {
  margin-bottom: 1rem;
}

.page-content code {
  background: var(--bg-secondary);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.page-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
}

.page-content pre code {
  background: none;
  padding: 0;
}

.page-content blockquote {
  border-left: 3px solid var(--border-color);
  padding-left: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.page-content ul, .page-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.page-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

/* ===== Footer ===== */
.site-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.page-footer {
  margin-top: 3rem;
  padding-top: 1rem;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .site-wrapper {
    padding: 1rem;
  }

  .site-title {
    font-size: 1.5rem;
  }

  .terminal-body {
    font-size: 0.8rem;
  }

  .log-entries li {
    flex-direction: column;
    gap: 0.2rem;
  }
}

/* ===== Scrollbar (Terminal) ===== */
.terminal-output::-webkit-scrollbar {
  width: 6px;
}

.terminal-output::-webkit-scrollbar-track {
  background: var(--bg-terminal);
}

.terminal-output::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}