:root {
  --bg: #fafafa;
  --text: #1c1d20;
  --muted: #6a6c72;
  --border: #dddee1;
  --accent: #9c6b16;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1d21;
    --text: #e6e6e8;
    --muted: #8c8e94;
    --border: #34363c;
    --accent: #e2b23f;
  }
}

html[data-theme="light"] {
  --bg: #fafafa;
  --text: #1c1d20;
  --muted: #6a6c72;
  --border: #dddee1;
  --accent: #9c6b16;
}

html[data-theme="dark"] {
  --bg: #1b1d21;
  --text: #e6e6e8;
  --muted: #8c8e94;
  --border: #34363c;
  --accent: #e2b23f;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

body {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.65; }

.wrap { max-width: 680px; margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: 880px; margin: 0 auto; padding: 0 24px; }

header.site { border-bottom: 1px solid var(--border); }
.header-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.logo { font-weight: 600; font-size: 15px; }
nav.links { display: flex; align-items: center; gap: 22px; }
nav.links a { font-size: 13px; color: var(--muted); }
nav.links a[aria-current="page"] { color: var(--accent); }

.theme-toggle {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px;
  cursor: pointer;
  background: none;
  color: var(--accent);
}
.theme-toggle svg { display: block; }
html[data-theme="dark"] .icon-sun { display: none; }
html[data-theme="light"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .icon-sun { display: none; }
}
@media (prefers-color-scheme: light) {
  html:not([data-theme]) .icon-moon { display: none; }
}

main { padding: 64px 0 96px; flex: 1 0 auto; }

.kicker { font-size: 13px; color: var(--accent); letter-spacing: 0.04em; margin-bottom: 16px; }
h1 { font-size: 32px; line-height: 1.3; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 12px; }
h1 a:hover { opacity: 1; }
.meta { font-size: 12px; color: var(--muted); margin-bottom: 28px; }

.lede, .post-body p { font-size: 15px; line-height: 1.85; margin: 0 0 18px; max-width: 620px; }
.post-body p { opacity: 0.92; }

.continue { display: inline-block; font-size: 14px; color: var(--accent); border-bottom: 1px solid var(--accent); padding-bottom: 2px; margin-top: 8px; }

footer.site { border-top: 1px solid var(--border); }
.footer-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-links { display: flex; gap: 18px; }

.page-head { margin-bottom: 40px; }
.page-head p { color: var(--muted); font-size: 14px; max-width: 500px; margin: 0; }

.tool-search {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  margin-bottom: 24px;
}
.tool-search::placeholder { color: var(--muted); }

.tools-empty { color: var(--muted); font-size: 14px; }

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.card { border: 1px solid var(--border); padding: 22px; }
.card h3 { font-size: 16px; font-weight: 600; margin: 0 0 8px; }
.card p { font-size: 13px; color: var(--muted); line-height: 1.6; margin: 0 0 16px; }
.card .tags { font-size: 11px; color: var(--muted); margin-bottom: 14px; }
.card a { font-size: 13px; color: var(--accent); }

.post-list { display: flex; flex-direction: column; gap: 30px; }
.post-item .meta-row { display: flex; gap: 14px; align-items: baseline; }
.post-item .date { font-size: 12px; color: var(--accent); width: 90px; flex-shrink: 0; font-variant-numeric: tabular-nums; }
.post-item h2 { font-size: 17px; font-weight: 600; margin: 0; }
.post-item .excerpt { font-size: 14px; color: var(--muted); margin: 6px 0 0 104px; line-height: 1.6; }

.back-link { font-size: 13px; color: var(--muted); margin-bottom: 28px; display: inline-block; }

.skills { font-size: 13px; color: var(--muted); line-height: 1.9; }

.converter { max-width: 520px; }
.cv-select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  margin-bottom: 16px;
}
.cv-row { display: flex; align-items: stretch; gap: 12px; }
.cv-field { flex: 1; min-width: 0; }
.cv-inputwrap { position: relative; }
.cv-input {
  width: 100%;
  height: 46px;
  font: inherit;
  line-height: 1.4;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0 14px;
}
.cv-output {
  display: flex;
  align-items: center;
  padding-right: 60px;
  color: var(--accent);
  overflow-x: auto;
  white-space: nowrap;
}
.cv-btn {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  font: inherit;
  font-size: 11px;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  padding: 4px 8px;
  cursor: pointer;
}
.cv-btn:hover { opacity: 0.65; }
.cv-arrow { align-self: center; color: var(--muted); }

.xfer { max-width: 560px; }
.xfer-modes { display: flex; gap: 8px; margin-bottom: 24px; }
.xfer-mode {
  font: inherit;
  font-size: 13px;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  padding: 8px 16px;
  cursor: pointer;
}
.xfer-mode.is-active { color: var(--accent); border-color: var(--accent); }
.xfer-step { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.xfer-step span { display: block; margin-bottom: 8px; }
.xfer-step input[type="file"] { font: inherit; font-size: 13px; color: var(--text); }
.xfer-code {
  display: block;
  width: 100%;
  font: inherit;
  font-size: 12px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 12px;
  resize: vertical;
}
.xfer-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.xfer-copy, .xfer-qrbtn, .xfer-scanbtn {
  font: inherit;
  font-size: 11px;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  padding: 4px 8px;
  cursor: pointer;
}
.xfer-copy:hover, .xfer-qrbtn:hover, .xfer-scanbtn:hover { opacity: 0.65; }
.xfer-qr { margin-top: 12px; font-size: 12px; color: var(--muted); }
.xfer-qr svg { width: 100%; max-width: 300px; height: auto; display: block; background: #fff; padding: 8px; }
.xfer-video { width: 100%; max-width: 320px; margin-top: 12px; border: 1px solid var(--border); }

.fmt { max-width: 720px; }
.fmt-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 12px; }
.fmt-select {
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 10px;
}
.fmt-detected { font-size: 12px; color: var(--muted); }
.fmt-area {
  display: block;
  width: 100%;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  resize: vertical;
}
.fmt-actions { display: flex; gap: 8px; margin: 12px 0; }
.fmt-btn {
  font: inherit;
  font-size: 13px;
  color: var(--accent);
  background: none;
  border: 1px solid var(--accent);
  padding: 8px 16px;
  cursor: pointer;
}
.fmt-btn:hover { opacity: 0.65; }
.fmt-btn-sub { color: var(--muted); border-color: var(--border); }
.fmt-msg { font-size: 12px; color: var(--accent); min-height: 1.2em; margin-top: 8px; white-space: pre-wrap; }

.enc { max-width: 480px; }
.enc-modes { display: flex; gap: 8px; margin-bottom: 24px; }
.enc-mode {
  font: inherit;
  font-size: 13px;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  padding: 8px 16px;
  cursor: pointer;
}
.enc-mode.is-active { color: var(--accent); border-color: var(--accent); }
.enc-step { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.enc-step span { display: block; margin-bottom: 8px; }
.enc-step input[type="file"] { font: inherit; font-size: 13px; color: var(--text); }
.enc-input {
  width: 100%;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 12px;
}
.enc-show { display: block; font-size: 12px; color: var(--muted); margin-bottom: 24px; }
.enc-btn {
  font: inherit;
  font-size: 13px;
  color: var(--accent);
  background: none;
  border: 1px solid var(--accent);
  padding: 10px 18px;
  cursor: pointer;
}
.enc-btn:hover { opacity: 0.65; }
.enc-btn:disabled { opacity: 0.4; cursor: default; }
.enc-status { font-size: 13px; color: var(--muted); min-height: 1.4em; margin-top: 16px; }
.enc-download { display: inline-block; margin-top: 14px; font-size: 13px; color: var(--accent); border-bottom: 1px solid var(--accent); }
.enc-note { font-size: 11px; color: var(--muted); line-height: 1.7; margin-top: 28px; max-width: 420px; }

.jwt { max-width: 760px; }
.jwt-step { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.jwt-step span { display: block; margin-bottom: 8px; }
.jwt-area {
  display: block;
  width: 100%;
  font: inherit;
  font-size: 12px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  resize: vertical;
  word-break: break-all;
}
.jwt-alg { font-size: 12px; color: var(--accent); margin-bottom: 16px; min-height: 1.2em; }
.jwt-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.jwt-label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.jwt-out {
  margin: 0;
  font: inherit;
  font-size: 12px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  min-height: 3em;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
}
.jwt-claims { font-size: 12px; color: var(--muted); line-height: 1.9; margin-bottom: 20px; }
.jwt-sig { font-size: 13px; color: var(--muted); min-height: 1.4em; margin-top: 8px; }
.jwt-good { color: #2e7d32; }
.jwt-bad { color: #c62828; }
html[data-theme="dark"] .jwt-good { color: #7bc97f; }
html[data-theme="dark"] .jwt-bad { color: #ef7a7a; }
@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .jwt-good { color: #7bc97f; }
  html:not([data-theme]) .jwt-bad { color: #ef7a7a; }
}
.jwt-msg { font-size: 12px; color: var(--accent); min-height: 1.2em; margin-top: 8px; }

/* shared tool primitives */
.tool { max-width: 640px; }
.seg { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.seg-btn {
  font: inherit;
  font-size: 13px;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  padding: 8px 16px;
  cursor: pointer;
}
.seg-btn.is-active { color: var(--accent); border-color: var(--accent); }
.tool-row { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.tool-row span { display: block; margin-bottom: 8px; }
.tool-row b { color: var(--text); font-weight: 600; }
.tool-field, .tool-area, .tool-select {
  width: 100%;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 12px;
}
.tool-area { display: block; font-size: 12px; resize: vertical; word-break: break-all; }
.tool-select { width: auto; }
.tool-range { width: 100%; }
.tool-check { display: block; font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.tool-actions { margin: 4px 0 18px; }
.tool-btn {
  font: inherit;
  font-size: 13px;
  color: var(--accent);
  background: none;
  border: 1px solid var(--accent);
  padding: 9px 16px;
  cursor: pointer;
  margin-right: 8px;
}
.tool-btn:hover { opacity: 0.65; }
.tool-btn:disabled { opacity: 0.4; cursor: default; }
.tool-btn.sub { color: var(--muted); border-color: var(--border); }
.tool-hint { color: var(--accent); }
.tool-dl { display: inline-block; font-size: 13px; color: var(--accent); border-bottom: 1px solid var(--accent); }
.tool-msg { font-size: 12px; color: var(--accent); min-height: 1.2em; margin-top: 8px; white-space: pre-wrap; }
.tool-note { font-size: 11px; color: var(--muted); line-height: 1.7; margin-top: 28px; max-width: 480px; }
.tool-input-file { font: inherit; font-size: 13px; color: var(--text); }
.tool-num { width: 5em; }
.tool-ops { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 18px; }
.tool-ops .tool-btn { margin: 0; }
.rx-hl {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 12px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  min-height: 3em;
  margin-bottom: 16px;
}
.rx-hl mark { background: var(--accent); color: var(--bg); }
.tool--wide { max-width: 100%; }
.editor-area {
  display: block;
  width: 100%;
  min-height: 55vh;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  resize: vertical;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  margin-bottom: 8px;
}
.editor-area.nowrap { white-space: pre; overflow-wrap: normal; overflow-x: auto; }

.paint-main { display: flex; gap: 24px; align-items: flex-start; }
.paint-rail { flex: 0 0 188px; display: flex; flex-direction: column; gap: 22px; }

.paint-toolbox { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.paint-tool {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  cursor: pointer;
}
.paint-tool svg { display: block; width: 20px; height: 20px; }
.paint-tool:hover { color: var(--text); border-color: var(--accent); }
.paint-tool.is-active { color: var(--accent); border-color: var(--accent); }

.paint-group > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.paint-rail select {
  width: 100%;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 10px;
}

.paint-colors { display: flex; align-items: center; gap: 14px; }
.paint-colors label { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.paint-colors input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 34px;
  height: 26px;
  padding: 0;
  border: 1px solid var(--border);
  background: none;
  cursor: pointer;
}
.paint-colors input[type="color"]::-webkit-color-swatch-wrapper { padding: 2px; }
.paint-colors input[type="color"]::-webkit-color-swatch { border: none; }
.paint-colors input[type="color"]::-moz-color-swatch { border: none; }

.paint-actions { display: flex; flex-direction: column; gap: 8px; }
.paint-actions .tool-btn { width: 100%; margin: 0; }

.paint-canvas-wrap { position: relative; flex: 1 1 auto; min-width: 0; }
.paint-canvas-wrap canvas {
  display: block;
  max-width: 100%;
  height: auto;
  background: #fff;
  border: 1px solid var(--border);
  touch-action: none;
}
.paint-text-input {
  position: absolute;
  z-index: 10;
  white-space: pre;
  background: transparent;
  outline: 1px dashed rgba(128, 128, 128, 0.9);
}

.paint-save { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.paint-save label { font-size: 12px; color: var(--muted); }
.paint-fname { width: auto; flex: 1 1 160px; max-width: 260px; }

.xfer-btn {
  font: inherit;
  font-size: 13px;
  color: var(--accent);
  background: none;
  border: 1px solid var(--accent);
  padding: 10px 18px;
  cursor: pointer;
  margin-bottom: 24px;
}
.xfer-btn:hover { opacity: 0.65; }
.xfer-status { font-size: 13px; color: var(--muted); min-height: 1.4em; }
.xfer-progress { width: 100%; height: 6px; margin-top: 12px; }
.xfer-download { display: inline-block; margin-top: 14px; font-size: 13px; color: var(--accent); border-bottom: 1px solid var(--accent); }

@media (max-width: 640px) {
  main { padding: 44px 0 72px; }
  h1 { font-size: 25px; }
  .post-item .excerpt { margin-left: 0; }
  .header-inner { padding: 18px; }
  .cv-row { flex-direction: column; }
  .cv-arrow { align-self: center; transform: rotate(90deg); padding: 4px 0; }
  .jwt-cols { grid-template-columns: 1fr; }
  .paint-main { flex-direction: column; }
  .paint-rail { flex-basis: auto; width: 100%; }
  .paint-toolbox { grid-template-columns: repeat(3, 1fr); }
}