:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #d9dde3;
  --text: #1c2026;
  --muted: #5d6673;
  --accent: #2f6fde;
  --accent-text: #ffffff;
  --accent-soft: #e6eefc;
  --ok: #1d7a46;
  --err: #b42318;
  --warn: #8a5a00;
  --radius: 8px;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1c1f24;
    --surface-2: #24282e;
    --border: #353a42;
    --text: #e4e7eb;
    --muted: #9aa3ae;
    --accent: #5b93f5;
    --accent-text: #0d1117;
    --accent-soft: #1f2d45;
    --ok: #4cc38a;
    --err: #f97066;
    --warn: #f0b429;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 var(--sans);
}

a { color: var(--accent); }

/* ---------- Layout ---------- */

.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100%;
}

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
  padding: 0 8px;
}

.filter {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  font-size: 14px;
}

#nav { display: flex; flex-direction: column; gap: 2px; }

#nav a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}
#nav a:hover { background: var(--surface-2); }
#nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.sidebar-note { margin-top: auto; font-size: 12px; color: var(--muted); padding: 0 8px; }

main {
  padding: 28px 36px 48px;
  max-width: 1200px;
  width: 100%;
  outline: none;
}

main h1 { margin: 0 0 4px; font-size: 22px; }
.tool-desc { margin: 0 0 20px; color: var(--muted); }

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--border); }
  #nav { flex-direction: row; flex-wrap: wrap; }
  .sidebar-note { display: none; }
  main { padding: 20px 16px 40px; }
  textarea { min-height: 200px; }
  .toolbar .spacer, .toolbar .hint { display: none; }
}

/* ---------- Home ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
}
.card {
  display: block;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
}
.card:hover { border-color: var(--accent); }
.card strong { display: block; margin-bottom: 2px; }
.card span { color: var(--muted); font-size: 13px; }

/* ---------- Controls ---------- */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-bottom: 12px;
}
.toolbar .spacer { flex: 1; }

button, .btn {
  font: inherit;
  font-size: 14px;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.link { border: 0; background: none; padding: 0; color: var(--accent); font-size: 13px; }
button.small { padding: 2px 8px; font-size: 12px; }

select, input[type="text"], input[type="number"], input[type="password"] {
  font: inherit;
  font-size: 14px;
  padding: 5px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
input[type="number"] { width: 90px; }

label.check { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }

kbd {
  font: 12px var(--mono);
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface-2);
}
.hint { color: var(--muted); font-size: 13px; }

/* ---------- Input / output panes ---------- */

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 1000px) { .panes { grid-template-columns: 1fr; } }

.pane { display: flex; flex-direction: column; min-width: 0; }
.pane-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

textarea, .mono-field {
  width: 100%;
  font: 13px/1.5 var(--mono);
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  tab-size: 2;
}
textarea { min-height: 380px; resize: vertical; }
textarea.short { min-height: 120px; }
textarea.short + .toolbar { margin-top: 12px; }
textarea[readonly] { background: var(--surface-2); }
textarea:focus, input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.status { min-height: 1.5em; margin: 8px 0 0; font-size: 13px; color: var(--muted); }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }
.status.warn { color: var(--warn); }

/* ---------- Result tables (timestamp, hash, jwt claims) ---------- */

.kv {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.kv th, .kv td { padding: 8px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.kv tr:last-child th, .kv tr:last-child td { border-bottom: 0; }
.kv th { width: 160px; font-weight: 600; font-size: 13px; color: var(--muted); white-space: nowrap; }
.kv td.val { font: 13px/1.5 var(--mono); word-break: break-all; }
.kv td.act { width: 1%; white-space: nowrap; }
.kv .sub { color: var(--muted); font-family: var(--sans); }

pre.block {
  margin: 0;
  font: 13px/1.5 var(--mono);
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 60px;
}

.section-title { margin: 22px 0 8px; font-size: 14px; font-weight: 600; color: var(--muted); }
.section-title:first-child { margin-top: 0; }

.now-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: baseline;
  padding: 12px 16px;
  margin-bottom: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.now-bar .mono { font: 15px var(--mono); }

/* ---------- Number base ---------- */

.base-grid { display: grid; gap: 10px; max-width: 760px; }
.base-row { display: grid; grid-template-columns: 90px 1fr auto; gap: 10px; align-items: center; }
.base-row label { font-size: 13px; font-weight: 600; color: var(--muted); }
.base-row input { font-family: var(--mono); width: 100%; }

.noscript { padding: 24px; }