:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #fbfbfc;
  --text: #14161a;
  --text-muted: #5c6470;
  --border: #e7e9ee;
  --border-strong: #d8dce3;
  --accent: #ff5c35;
  --accent-soft: rgba(255, 92, 53, 0.1);
  --accent-strong: #e8471f;
  --error: #d92d20;
  --error-soft: rgba(217, 45, 32, 0.08);
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(16, 22, 30, 0.05), 0 8px 24px rgba(16, 22, 30, 0.06);
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0e12;
    --surface: #16191f;
    --surface-2: #1b1f27;
    --text: #eef1f5;
    --text-muted: #98a1b0;
    --border: #262b33;
    --border-strong: #333a44;
    --accent: #ff6a45;
    --accent-soft: rgba(255, 106, 69, 0.13);
    --accent-strong: #ff7d5c;
    --error: #ff6b5e;
    --error-soft: rgba(255, 107, 94, 0.1);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 22px;
}
.brand { display: flex; align-items: center; gap: 9px; }
.brand-mark { display: inline-flex; }
.brand-name { font-weight: 650; font-size: 16px; letter-spacing: -0.01em; }
.brand-sub { color: var(--text-muted); font-size: 13px; font-weight: 450; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 13.5px; }
.nav a { color: var(--text-muted); }
.nav a:hover { color: var(--accent); }

/* ---------- hero ---------- */
.hero { padding: 14px 0 26px; }
.eyebrow {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 550;
  color: var(--accent-strong);
  background: var(--accent-soft);
  padding: 4px 11px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(30px, 5.2vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 680;
}
.hero h1 .accent { color: var(--accent); }
.lede {
  margin: 0;
  max-width: 62ch;
  color: var(--text-muted);
  font-size: 16px;
}
.lede strong { color: var(--text); font-weight: 600; }

.format-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  padding: 0;
  margin: 22px 0 0;
}
.format-chips li {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 4px 9px;
  border-radius: 7px;
}

/* ---------- converter ---------- */
.converter { margin: 8px 0 28px; }
.dropzone {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 46px 24px;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: border-color 0.15s, background 0.15s, transform 0.05s;
}
.dropzone:hover,
.dropzone.over {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone:active { transform: scale(0.997); }
.dz-icon { color: var(--accent); display: inline-flex; }
.dz-title { font-size: 16.5px; font-weight: 600; }
.dz-hint { font-size: 13px; color: var(--text-muted); }

.samples {
  margin: 14px 0 0;
  font-size: 13.5px;
  color: var(--text-muted);
}
.chip-btn {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 550;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  padding: 4px 10px;
  margin-left: 4px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.chip-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- result ---------- */
.result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 34px;
}
.result-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.file-name {
  font-weight: 600;
  font-size: 13.5px;
  overflow-wrap: anywhere;
  max-width: 32ch;
}
.format-badge {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--accent-strong);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 6px;
  text-transform: uppercase;
}
.stats {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
}
.spacer { flex: 1 1 auto; }
.tabs { display: inline-flex; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 2px; }
.tab {
  font: inherit;
  font-size: 12.5px;
  font-weight: 550;
  color: var(--text-muted);
  background: transparent;
  border: 0;
  padding: 4px 11px;
  border-radius: 6px;
  cursor: pointer;
}
.tab.active { background: var(--surface); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,0.06); }
.btn {
  font: inherit;
  font-size: 13px;
  font-weight: 550;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 5px 13px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: #fff; }

.output-wrap { max-height: 62vh; overflow: auto; }
.preview { padding: 22px 26px; }
.raw {
  margin: 0;
  padding: 22px 26px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--text);
}
.error-box {
  margin: 0;
  padding: 22px 26px;
  color: var(--error);
  background: var(--error-soft);
  font-family: var(--mono);
  font-size: 13px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- info sections ---------- */
.info { margin: 30px 0; }
.info h2 {
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}
.info-lede { color: var(--text-muted); margin: 0 0 14px; max-width: 70ch; }

.facts { display: grid; gap: 0; }
.fact {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0 18px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
}
.fact:first-child { border-top: 0; padding-top: 0; }
.fact dt { color: var(--text-muted); font-size: 13.5px; font-weight: 550; }
.fact dd { margin: 0; color: var(--text-muted); font-size: 14.5px; max-width: 70ch; }
.fact dd strong { color: var(--text); font-weight: 600; }

.installs { display: grid; grid-template-columns: 92px 1fr; gap: 8px 14px; align-items: baseline; }
.install { display: contents; }
.install .k { color: var(--text-muted); font-size: 13.5px; font-weight: 550; }
.install .cmd {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-user-select: all;
  user-select: all;
}
.install .dollar { color: var(--accent); user-select: none; margin-right: 4px; }

/* ---------- footer ---------- */
.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}
.footer a { text-decoration: none; }

/* ---------- markdown rendering ---------- */
.markdown-body { color: var(--text); font-size: 14.5px; line-height: 1.7; }
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
  line-height: 1.3; margin: 1.4em 0 0.6em; font-weight: 650; letter-spacing: -0.01em;
}
.markdown-body h1 { font-size: 1.7em; }
.markdown-body h2 { font-size: 1.4em; border-bottom: 1px solid var(--border); padding-bottom: 0.3em; }
.markdown-body h3 { font-size: 1.18em; }
.markdown-body p { margin: 0.7em 0; }
.markdown-body a { color: var(--accent-strong); text-decoration: underline; text-underline-offset: 2px; }
.markdown-body code {
  font-family: var(--mono); font-size: 0.88em;
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 0.12em 0.4em; border-radius: 5px;
}
.markdown-body pre {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 16px; overflow: auto;
}
.markdown-body pre code { background: none; border: 0; padding: 0; font-size: 0.85em; }
.markdown-body blockquote {
  margin: 0.9em 0; padding: 0.2em 1em; color: var(--text-muted);
  border-left: 3px solid var(--border-strong);
}
.markdown-body ul, .markdown-body ol { padding-left: 1.5em; margin: 0.6em 0; }
.markdown-body li { margin: 0.25em 0; }
.markdown-body table {
  border-collapse: collapse; width: 100%; margin: 1em 0; font-size: 13.5px;
  display: block; overflow-x: auto;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--border); padding: 7px 11px; text-align: left;
}
.markdown-body th { background: var(--surface-2); font-weight: 600; }
.markdown-body hr { border: 0; border-top: 1px solid var(--border); margin: 1.4em 0; }
.markdown-body img { max-width: 100%; border-radius: var(--radius-sm); }

@media (max-width: 600px) {
  .fact { grid-template-columns: 1fr; gap: 2px; }
  .fact dt { padding-bottom: 0; }
  .fact dd { padding-top: 0; }
  .installs { grid-template-columns: 1fr; gap: 2px; }
  .install .k { margin-top: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto; }
}

/* ---------- blog ---------- */
.more-link { margin-top: 18px; }
.more-link a { font-weight: 550; }

.postlist {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 8px 0 30px;
}
.post-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color 0.15s, transform 0.05s;
}
.post-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.post-tag {
  align-self: flex-start;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--accent-strong);
  background: var(--accent-soft);
  padding: 2px 9px;
  border-radius: 999px;
}
.post-card h3 { margin: 0; font-size: 16.5px; font-weight: 650; letter-spacing: -0.01em; line-height: 1.35; }
.post-card p { margin: 0; color: var(--text-muted); font-size: 13.5px; line-height: 1.6; }
.post-date { margin-top: auto; font-family: var(--mono); font-size: 11.5px; color: var(--text-muted); }

.post { max-width: 760px; margin: 0 auto; }
.post-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-strong);
  background: var(--accent-soft);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  margin: 0 0 14px;
}
.post > h1 {
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 22px;
}
.post-nav {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--text-muted);
}
.post-nav a { color: var(--accent-strong); }

@media (max-width: 640px) {
  .postlist { grid-template-columns: 1fr; }
}

/* ---------- cookie consent banner ---------- */
.cc-banner {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 60;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  padding: 16px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -6px 24px rgba(0, 0, 0, 0.22);
}
.cc-banner[hidden] { display: none; }
.cc-text {
  flex: 1 1 300px;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
}
.cc-text a { color: var(--accent-strong); text-decoration: underline; }
.cc-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.cc-btn {
  font: inherit;
  font-size: 13.5px;
  font-weight: 550;
  padding: 9px 18px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}
.cc-btn:hover { border-color: var(--accent); }
.cc-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.cc-btn.primary:hover { filter: brightness(1.05); }

/* ---------- ad slot ---------- */
.ad-slot {
  margin: 30px 0;
  text-align: center;
}
.ad-slot ins.adsbygoogle {
  display: block;
  background: var(--surface-2);
  border-radius: var(--radius);
  min-height: 1px;
}

@media (max-width: 560px) {
  .cc-banner { flex-direction: column; align-items: stretch; }
  .cc-actions { justify-content: flex-end; }
}