/* --- Root / Light Theme --- */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #1a1a1a;
  --text-muted: #666666;
  --border: #e8e8e8;
  --code-bg: #f9f9f9;
  --accent: #111111;
  --progress-bar-color: #111111;
  --font-mono: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* --- Dark Theme Overrides --- */
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #121212;
  --text: #e0e0e0;
  --text-muted: #9e9e9e;
  --border: #2c2c2c;
  --code-bg: #1b1b1b;
  --accent: #f0f0f0;
  --progress-bar-color: #f0f0f0;
}

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

html.lenis, 
html.lenis body {
  height: auto;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  padding: 0;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Reading Progress Bar */
#progressBar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--progress-bar-color);
  width: 0%;
  z-index: 1000;
  transition: width 0.05s linear;
}

/* Full-Width Header */
.site-header {
  width: 100%;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: static;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.site-title {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* GitHub Link in Navbar */
.header-repo {
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 8px;
  white-space: nowrap;
  line-height: 1;
  transition: color 0.2s ease;
}

.header-repo i {
  font-size: 1.1rem;
  line-height: 1;
  display: inline-block;
  vertical-align: middle;
}

.header-repo span {
  display: inline-block;
  vertical-align: middle;
  line-height: 1;
}

.header-repo:hover {
  color: var(--text);
  text-decoration: underline;
}

/* MDN-Style Theme Menu */
.theme-menu-container {
  position: relative;
  display: inline-block;
}

.theme-menu-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 8px;
  white-space: nowrap;
  line-height: 1;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.theme-menu-btn:hover {
  border-color: var(--text);
}

.caret-icon {
  font-size: 0.65rem;
  color: var(--text-muted);
}

.theme-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  list-style: none;
  min-width: 160px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: 200;
}

[data-theme="dark"] .theme-dropdown {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.theme-dropdown[hidden] {
  display: none;
}

.theme-option {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
}

.theme-option:hover {
  background: var(--code-bg);
}

.theme-option .checkmark {
  margin-left: auto;
  font-size: 0.75rem;
  display: none;
}

.theme-option.active {
  font-weight: 600;
}

.theme-option.active .checkmark {
  display: inline-block;
}

/* Main Content Area */
.wrapper {
  max-width: 720px;
  margin: 0 auto;
  min-height: calc(100vh - 120px);
  display: flex;
  flex-direction: column;
  padding: 0 20px;
}

main {
  flex: 1;
  padding: 40px 0;
}

.meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

h1 {
  font-size: 2rem;
  line-height: 1.3;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  word-break: break-word;
}

.writeup-section {
  margin-bottom: 40px;
}

.writeup-section h2 {
  font-size: 1.3rem;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

p {
  margin-bottom: 16px;
  color: var(--text);
  word-break: break-word;
}

.text-link {
  color: var(--text);
  text-decoration: underline;
  font-family: var(--font-mono);
  word-break: break-all;
}

.inline-packages {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 2;
  color: var(--text);
  word-break: break-word;
}

/* Real Screenshot Container */
.screenshot-container {
  width: 100%;
  margin: 24px 0 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: #000000;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.terminal-screenshot {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Clean List */
.clean-options-list {
  list-style: none;
  margin: 16px 0 24px;
}

.clean-options-list li {
  margin-bottom: 12px;
  padding-left: 14px;
  border-left: 2px solid var(--border);
  font-size: 0.95rem;
  color: var(--text);
  word-break: break-word;
}

.clean-options-list li code {
  font-weight: 600;
  color: var(--accent);
}

/* Responsive Table */
.table-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 24px 0 32px;
  border: 1px solid var(--border);
  border-radius: 4px;
  width: 100%;
}

table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

th, td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--text);
}

th {
  background: var(--code-bg);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

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

/* Code Blocks & Copy Button */
pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 18px 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 20px 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text);
  max-width: 100%;
  box-sizing: border-box;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 2px 5px;
  border-radius: 3px;
  color: var(--accent);
  word-break: break-word;
}

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

.copy-code-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.15s ease;
}

.copy-code-btn:hover {
  color: var(--text);
  border-color: var(--text);
}

.copy-code-btn.copied {
  color: #2da44e;
  border-color: #2da44e;
}

/* Feedback Form with Non-Resizable Textarea */
.writeup-form {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.writeup-form h2 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.form-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

input, 
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.2s ease;
}

textarea {
  resize: none;
}

input:focus, 
textarea:focus {
  border-color: var(--accent);
}

button[type="submit"] {
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 10px 20px;
  font-size: 0.9rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: opacity 0.2s ease;
}

button[type="submit"]:hover {
  opacity: 0.88;
}

.form-status {
  margin-top: 14px;
  font-size: 0.88rem;
  font-family: var(--font-mono);
  color: var(--text);
}

/* Full-Width Footer Matching Header */
.site-footer {
  width: 100%;
  border-top: 1px solid var(--border);
  background: var(--bg);
  margin-top: 40px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

/* Keep the footer copyright visually lighter than the navbar title */
.site-footer .site-title {
  font-weight: 400;
  font-size: 0.85rem;
  letter-spacing: 0;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  line-height: 1;
  transition: color 0.2s ease;
}

.footer-link i {
  font-size: 1.1rem;
  line-height: 1;
}

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

/* --- Mobile Responsiveness --- */
@media (max-width: 640px) {
  .header-inner,
  .footer-inner {
    padding: 12px 16px;
    gap: 10px;
  }

  .site-title {
    font-size: 1rem;
  }

  .site-footer .site-title {
    font-size: 0.78rem;
    font-weight: 400;
  }

  .header-actions,
  .footer-actions {
    gap: 10px;
    flex-wrap: wrap;
  }

  .header-repo,
  .footer-link {
    font-size: 0.75rem;
    gap: 5px;
  }

  .footer-inner {
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .theme-menu-btn {
    padding: 5px 8px;
    font-size: 0.78rem;
  }

  .wrapper {
    padding: 0 16px;
  }

  main {
    padding: 24px 0;
  }

  h1 {
    font-size: 1.55rem;
    line-height: 1.35;
    margin-bottom: 24px;
  }

  .writeup-section h2 {
    font-size: 1.18rem;
  }

  pre {
    padding: 14px 12px;
    font-size: 0.8rem;
  }
}