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

:root {
  --bg: #0d1117;
  --text: #c9d1d9;
  --accent: #58a6ff;
  --green: #3fb950;
  --dim: #484f58;
  --prompt: #58a6ff;
  --error: #f85149;
  --border: #21262d;
  --surface: #161b22;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', monospace;
  font-size: 14px;
  line-height: 1.6;
}

/* ---------- terminal ---------- */

.terminal {
  max-width: 820px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  user-select: none;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.terminal-dot:hover { opacity: 0.7; }

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

/* terminal states */
.terminal.minimized .terminal-body { display: none; }
.terminal.minimized .terminal-header { border-radius: 8px; border-bottom: 1px solid var(--border); }

.terminal.fullscreen {
  max-width: 100%;
  padding: 0;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 1000;
}

.terminal.fullscreen .terminal-header { border-radius: 0; }
.terminal.fullscreen .terminal-body {
  border-radius: 0;
  min-height: calc(100vh - 42px);
}

.terminal.closed .terminal-header,
.terminal.closed .terminal-body { display: none; }

.terminal-reopen {
  display: none;
  text-align: center;
  padding: 80px 20px;
  color: var(--dim);
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
}

.terminal-reopen:hover { color: var(--accent); }
.terminal-reopen span { border-bottom: 1px dashed var(--dim); }
.terminal-reopen:hover span { border-color: var(--accent); }
.terminal.closed + .terminal-reopen { display: block; }

.terminal-title {
  flex: 1;
  text-align: center;
  color: var(--dim);
  font-size: 12px;
}

.terminal-body {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0 0 8px 8px;
  padding: 20px;
}

/* ---------- output lines ---------- */

.output-line {
  white-space: pre-wrap;
  word-break: break-word;
}

.prompt-symbol {
  color: var(--prompt);
  user-select: none;
}

.cmd-text {
  color: var(--green);
}

.accent { color: var(--accent); }
.green { color: var(--green); }
.dim { color: var(--dim); }
.error { color: var(--error); }
.bold { font-weight: 700; }

a, a:visited {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  text-decoration: underline;
}

/* ---------- input ---------- */

.input-line {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 4px;
}

.input-line .prompt-symbol {
  flex-shrink: 0;
  padding-right: 8px;
}

#terminal-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--green);
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  caret-color: var(--green);
}

/* ---------- blog ---------- */

.blog-layout {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px;
}

.blog-layout .back {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--dim);
  transition: color 0.2s ease;
}

.blog-layout .back:hover {
  color: var(--accent);
}

.blog-layout h1 {
  color: var(--accent);
  font-size: 24px;
  margin-bottom: 8px;
}

.blog-layout .meta {
  color: var(--dim);
  font-size: 13px;
  margin-bottom: 32px;
}

.blog-layout .content h2 { color: var(--accent); margin: 28px 0 12px; font-size: 18px; }
.blog-layout .content h3 { color: var(--text); margin: 24px 0 8px; font-size: 16px; }
.blog-layout .content p { margin-bottom: 16px; }
.blog-layout .content ul, .blog-layout .content ol { margin: 0 0 16px 20px; }
.blog-layout .content li { margin-bottom: 4px; }

.blog-layout .content code {
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}

.blog-layout .content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}

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

.blog-layout .content blockquote {
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  background: rgba(88, 166, 255, 0.05);
  border-radius: 0 6px 6px 0;
  color: var(--dim);
  margin-bottom: 16px;
}

.post-list {
  list-style: none;
}

.post-list li {
  margin-bottom: 12px;
}

.post-list .date {
  color: var(--dim);
  margin-right: 12px;
  font-size: 13px;
}

/* ---------- scrollbar ---------- */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--dim);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) var(--bg);
}

/* ---------- selection ---------- */

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* ---------- cursor blink ---------- */

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

#terminal-input {
  caret-color: var(--green);
}

/* ---------- syntax highlighting helpers ---------- */

.blog-layout .content pre code .keyword { color: #ff7b72; }
.blog-layout .content pre code .string { color: #a5d6ff; }
.blog-layout .content pre code .comment { color: var(--dim); font-style: italic; }
.blog-layout .content pre code .function { color: #d2a8ff; }
.blog-layout .content pre code .number { color: #79c0ff; }

/* ---------- post navigation ---------- */

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.post-nav-link {
  color: var(--dim);
  font-size: 13px;
  max-width: 45%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.post-nav-link:hover {
  color: var(--accent);
}

.post-nav-link.next {
  margin-left: auto;
  text-align: right;
}

/* ---------- mobile ---------- */

@media (max-width: 768px) {
  html, body {
    font-size: 13px;
  }

  .terminal {
    padding: 10px;
  }

  .terminal-body {
    padding: 12px;
  }

  .terminal-header {
    padding: 8px 12px;
  }

  .blog-layout {
    padding: 24px 12px;
  }

  .blog-layout h1 {
    font-size: 20px;
  }

  .blog-layout .content h2 {
    font-size: 16px;
  }

  .blog-layout .content pre {
    padding: 12px;
    font-size: 12px;
  }
}