/* ===================== Themes ===================== */

:root,
[data-theme="minimal"] {
  --bg: #fafafa;
  --bg-card: #ffffff;
  --bg-hover: #f5f5f5;
  --text: #111111;
  --text-secondary: #555555;
  --text-muted: #999999;
  --border: rgba(0, 0, 0, 0.06);
  --border-hover: rgba(0, 0, 0, 0.12);
  --accent: #111111;
  --accent-subtle: rgba(0, 0, 0, 0.04);
  --tag-bg: rgba(0, 0, 0, 0.05);
  --tag-bg-active: #111111;
  --tag-text: #555555;
  --tag-text-active: #ffffff;
  --code-bg: #f0f0f0;
  --code-border: rgba(0, 0, 0, 0.06);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --toggle-icon: "\263E"; /* moon */
}

[data-theme="terminal"] {
  --bg: #0c0c0c;
  --bg-card: #161616;
  --bg-hover: #1a1a1a;
  --text: #e0e0e0;
  --text-secondary: #888888;
  --text-muted: #555555;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --accent: #00e639;
  --accent-subtle: rgba(0, 230, 57, 0.06);
  --tag-bg: rgba(0, 230, 57, 0.08);
  --tag-bg-active: #00e639;
  --tag-text: #00cc33;
  --tag-text-active: #0c0c0c;
  --code-bg: #111111;
  --code-border: rgba(0, 230, 57, 0.1);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 2px 12px rgba(0, 230, 57, 0.06);
  --font: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  --radius: 4px;
  --radius-sm: 3px;
  --radius-xs: 2px;
  --toggle-icon: "\2600"; /* sun */
}

/* ===================== Reset ===================== */

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

/* ===================== Base ===================== */

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ===================== Header ===================== */

header {
  margin-bottom: 2.5rem;
}

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

[data-theme="terminal"] h1 {
  color: var(--accent);
}

[data-theme="terminal"] h1::before {
  content: "~ ";
  opacity: 0.4;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

#theme-toggle {
  appearance: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  transition: all 0.2s ease;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

#theme-toggle:hover {
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

#theme-toggle .theme-icon::after {
  content: var(--toggle-icon);
}

/* ===================== Filters ===================== */

#filters {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

#tag-filter,
#date-filter {
  appearance: none;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-family: var(--font);
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: border-color 0.15s ease;
}

#date-filter:hover {
  border-color: var(--border-hover);
}

/* ===================== Entries ===================== */

.entry {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  background: var(--bg-card);
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.entry:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.entry-link {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.entry-preview {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.entry-header {
  margin-bottom: 0.75rem;
}

.entry-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin-bottom: 0.4rem;
}

.entry-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.entry-date {
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

[data-theme="terminal"] .entry-date::before {
  content: "$ ";
  opacity: 0.4;
}

.entry-tags {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 12px;
  font-weight: 500;
  padding: 0.125rem 0.45rem;
  border-radius: 100px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ===================== Entry content ===================== */

.entry-content {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Hide the h1 title (already shown in entry-header) */
.entry-content > h1:first-child,
.entry-content > p:first-child:empty {
  display: none;
}

.entry-content > *:first-child {
  margin-top: 0;
}

.entry-content > *:last-child {
  margin-bottom: 0;
}

.entry-content h2,
.entry-content h3,
.entry-content h4 {
  color: var(--text);
  margin: 0.75rem 0 0.25rem;
  font-weight: 600;
}

.entry-content p {
  margin: 0.4rem 0;
}

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

.entry-content em {
  font-style: italic;
}

.entry-content code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82em;
  border: 1px solid var(--code-border);
  word-break: break-word;
}

.entry-content pre {
  background: var(--code-bg);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 0.5rem 0;
  border: 1px solid var(--code-border);
  line-height: 1.45;
}

.entry-content pre code {
  background: none;
  padding: 0;
  border: none;
  font-size: 0.8rem;
  word-break: normal;
}

.entry-content ul,
.entry-content ol {
  padding-left: 1.25rem;
  margin: 0.35rem 0;
}

.entry-content li {
  margin: 0.15rem 0;
}

.entry-content li > ul,
.entry-content li > ol {
  margin: 0.1rem 0;
}

.entry-content li > p {
  margin: 0.15rem 0;
}

.entry-content blockquote {
  border-left: 3px solid var(--border-hover);
  padding-left: 0.75rem;
  margin: 0.5rem 0;
  color: var(--text-muted);
  font-style: italic;
}

.entry-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.entry-content a:hover {
  border-bottom-color: var(--accent);
}

.entry-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0.75rem 0;
}

/* ===================== States ===================== */

.loading, .empty {
  text-align: center;
  color: var(--text-muted);
  padding: 4rem 0;
  font-size: 0.9rem;
}

[data-theme="terminal"] .loading::after {
  content: "_";
  animation: blink 0.8s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ===================== Back nav & header link ===================== */

.header-link {
  color: inherit;
  text-decoration: none;
}

.header-link:hover {
  opacity: 0.7;
}

.back-nav {
  margin-bottom: 1.5rem;
}

.back-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.15s ease;
}

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

[data-theme="terminal"] .back-link:hover {
  color: var(--accent);
}

/* ===================== Entry full (detail page) ===================== */

.entry-full {
  border: none;
  box-shadow: none;
  background: transparent;
  padding: 0;
}

.entry-full:hover {
  box-shadow: none;
  border-color: transparent;
}

.entry-full .entry-header {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.entry-full .entry-title {
  font-size: 1.35rem;
}

/* ===================== Footer ===================== */

footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

/* ===================== Responsive ===================== */

@media (max-width: 520px) {
  body {
    padding: 2rem 1rem 3rem;
  }
  h1 { font-size: 1.5rem; }
  .entry { padding: 1.25rem; }
  #filters { flex-direction: column; align-items: flex-start; }
}