/* ------------------------------------------------------------------ tokens */
:root {
  --bg:        #f7f7f6;
  --bg-tint:   #efefec;
  --surface:   #ffffff;
  --surface-2: #fafaf9;
  --ink:       #17181a;
  --ink-soft:  #55565a;
  --ink-faint: #8b8c90;
  --line:      #e6e6e2;
  --line-soft: #efefec;

  --accent:      #0f7a4f;
  --accent-hover:#0c6a45;
  --accent-ink:  #ffffff;
  --accent-wash: #e9f4ee;

  --ok:   #0f7a4f;
  --warn: #9a6a00;
  --err:  #c0322b;
  --ok-wash:   #e9f4ee;
  --warn-wash: #fbf1dd;
  --err-wash:  #fbeae9;

  --radius:   12px;
  --radius-s: 8px;
  --shadow-1: 0 1px 2px rgba(20,20,25,.04), 0 1px 3px rgba(20,20,25,.06);
  --shadow-2: 0 4px 12px rgba(20,20,25,.06), 0 12px 32px rgba(20,20,25,.08);

  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Segoe UI Variable", Roboto,
          Inter, system-ui, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #101113;
    --bg-tint:   #17181b;
    --surface:   #1a1c1f;
    --surface-2: #212328;
    --ink:       #eceded;
    --ink-soft:  #b6b8bc;
    --ink-faint: #7c7e84;
    --line:      #2c2e33;
    --line-soft: #24262b;

    --accent:      #35b881;
    --accent-hover:#43c690;
    --accent-ink:  #06110c;
    --accent-wash: #142a20;

    --ok:   #45c690;  --warn: #e0ad4b;  --err:  #ef6f68;
    --ok-wash:   #142a20;  --warn-wash: #2c2413;  --err-wash: #2c1a19;
    --shadow-1: 0 1px 2px rgba(0,0,0,.3);
    --shadow-2: 0 8px 30px rgba(0,0,0,.45);
  }
}

/* ------------------------------------------------------------------ base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1100px 460px at 78% -8%, var(--accent-wash), transparent 62%),
    var(--bg);
  color: var(--ink);
  font: 400 15px/1.6 var(--sans);
  letter-spacing: -0.006em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: color-mix(in srgb, var(--accent) 26%, transparent); }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }

.wrap { max-width: 820px; margin: 0 auto; padding: 0 22px; }

/* ------------------------------------------------------------------ header */
header { padding: 52px 0 26px; }
header .eyebrow {
  font: 600 11.5px/1 var(--mono); letter-spacing: .11em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
header h1 {
  margin: 0 0 10px; font-size: 30px; line-height: 1.15; font-weight: 680;
  letter-spacing: -0.022em;
}
header .sub { margin: 0; max-width: 80ch; color: var(--ink-soft); font-size: 15.5px; }
header .sub code { font-size: .88em; }

.callout {
  margin-top: 22px; display: flex; gap: 12px; align-items: flex-start;
  padding: 13px 15px; border-radius: var(--radius-s);
  background: var(--warn-wash); border: 1px solid color-mix(in srgb, var(--warn) 28%, var(--line));
  color: var(--ink-soft); font-size: 13.5px; line-height: 1.5;
}
.callout::before {
  content: "!"; flex: none; width: 18px; height: 18px; margin-top: 1px;
  display: grid; place-items: center; border-radius: 6px;
  background: var(--warn); color: #fff; font: 700 12px/1 var(--sans);
}
.callout strong { color: var(--ink); }
.callout p { margin: 0 0 8px; }
.callout p:last-child { margin-bottom: 0; }

/* ------------------------------------------------------------------ nav */
nav {
  position: sticky; top: 12px; z-index: 10; margin: 8px 0 30px;
}
nav .seg {
  display: flex; gap: 3px; padding: 4px; border-radius: 11px;
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(10px) saturate(1.4);
  -webkit-backdrop-filter: blur(10px) saturate(1.4);
  overflow-x: auto;
}
nav button {
  flex: 1 0 auto; white-space: nowrap;
  border: 0; background: none; color: var(--ink-faint);
  padding: 8px 13px; border-radius: 8px; cursor: pointer;
  font: 500 13.5px/1 var(--sans); letter-spacing: -0.01em;
  transition: color .14s, background .14s;
}
nav button:hover { color: var(--ink); }
nav button.active {
  background: var(--surface); color: var(--ink);
  box-shadow: var(--shadow-1);
}

/* ------------------------------------------------------------------ cards */
main { padding-bottom: 90px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 26px 26px 28px;
  animation: rise .28s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }
.card.hidden { display: none; }
.card h2 { margin: 0 0 6px; font-size: 19px; font-weight: 650; letter-spacing: -0.018em; }
.card .lede { margin: 0 0 22px; color: var(--ink-soft); font-size: 13.5px; }
.card .lede code { font-size: .9em; }
.card .lede-list {
  margin: -12px 0 22px; padding-left: 20px; max-width: 90ch;
  color: var(--ink-soft); font-size: 13px; line-height: 1.6;
}
.card .lede-list li { margin: 3px 0; }
.card .lede-list code { font-size: .9em; }

/* ------------------------------------------------------------------ forms */
label {
  display: block; font: 600 12px/1.3 var(--sans); letter-spacing: .01em;
  color: var(--ink-soft); margin: 16px 0 6px;
}
label:first-of-type { margin-top: 0; }
label .hint { font-weight: 400; color: var(--ink-faint); letter-spacing: 0; }

input[type=text], input[type=number], select, textarea {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: var(--radius-s);
  background: var(--surface-2); color: var(--ink);
  font: 400 14px/1.5 var(--sans);
  transition: border-color .14s, box-shadow .14s, background .14s;
  appearance: none; -webkit-appearance: none;
}
input::placeholder, textarea::placeholder { color: var(--ink-faint); }
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3.5px color-mix(in srgb, var(--accent) 18%, transparent);
  background: var(--surface);
}
select {
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='none' stroke='%238b8c90' stroke-width='1.6' stroke-linecap='round' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
  padding-right: 34px; cursor: pointer;
}
textarea {
  font-family: var(--mono); font-size: 12.5px; line-height: 1.6;
  min-height: 108px; resize: vertical;
}
textarea.short { min-height: 64px; }
textarea[readonly] { background: var(--bg-tint); color: var(--ink-soft); }
textarea:disabled, textarea.grayed {
  background: var(--bg-tint); color: var(--ink-faint);
  cursor: not-allowed; opacity: .65;
}

/* the "reveal hidden characters" view of the watermarked text */
#wm-result-viz {
  min-height: 108px; margin: 0;
  font: 400 12.5px/1.6 var(--mono);
  background: var(--bg-tint); color: var(--ink-soft);
  white-space: pre-wrap; word-break: break-word;
}
#wm-result-viz .zw {
  color: var(--err); font-weight: 600;
}
/* tzsataitw-2: Cyrillic look-alike letters, highlighted in place */
#wm-result-viz .hg {
  background: var(--err-wash);
  color: var(--err);
  border-radius: 2px;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--err) 35%, transparent);
}

.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; }
.row > div { min-width: 0; }
.row label { margin-top: 16px; }

/* ------------------------------------------------------------------ buttons */
button.go {
  margin-top: 22px; padding: 11px 20px;
  border: 0; border-radius: 9px;
  background: var(--accent); color: var(--accent-ink);
  font: 600 14px/1 var(--sans); letter-spacing: -0.01em; cursor: pointer;
  box-shadow: 0 1px 2px rgba(15,122,79,.25), inset 0 1px 0 rgba(255,255,255,.12);
  transition: background .14s, transform .06s, box-shadow .14s;
}
button.go:hover { background: var(--accent-hover); }
button.go:active { transform: translateY(1px); }
button.go:disabled { opacity: .55; cursor: default; transform: none; }

button.mini {
  padding: 6px 11px; margin-right: 6px;
  border: 1px solid var(--line); border-radius: 7px;
  background: var(--surface-2); color: var(--ink);
  font: 500 12px/1 var(--sans); cursor: pointer;
  transition: background .12s, border-color .12s;
}
button.mini:hover { background: var(--bg-tint); border-color: var(--ink-faint); }
button.mini:disabled { opacity: .5; cursor: not-allowed; }
button.mini:disabled:hover { background: var(--surface-2); border-color: var(--line); }

/* ------------------------------------------------------------------ output */
.out { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--line-soft); }
.out.hidden { display: none; }
.out > label:first-child { margin-top: 0; }

pre {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  padding: 12px 14px; margin: 6px 0 4px;
  overflow-x: auto;
  font: 400 12px/1.65 var(--mono);
  white-space: pre-wrap; word-break: break-word;
  color: var(--ink);
}

/* ASCII box-tables must NOT wrap or the borders misalign -- scroll instead */
pre.report {
  white-space: pre;
  word-break: normal;
  line-height: 1.5;
  -webkit-overflow-scrolling: touch;
}

.kv {
  margin-top: 12px;
  border: 1px solid var(--line); border-radius: var(--radius-s);
  overflow: hidden;
}
.kv div {
  display: grid; grid-template-columns: 148px 1fr; gap: 14px;
  padding: 8px 14px;
  font: 400 12px/1.5 var(--mono);
}
.kv div + div { border-top: 1px solid var(--line-soft); }
.kv .k { color: var(--ink-faint); }
.kv .v { color: var(--ink); word-break: break-word; }

/* ------------------------------------------------------------------ verdict */
.verdict {
  display: flex; align-items: center; gap: 10px;
  font: 650 15px/1.3 var(--sans); letter-spacing: -0.01em;
  padding: 14px 16px; border-radius: var(--radius-s);
  margin: 0 0 14px;
  border: 1px solid var(--line);
}
.verdict::before {
  content: ""; flex: none; width: 9px; height: 9px; border-radius: 50%;
  box-shadow: 0 0 0 4px color-mix(in srgb, currentColor 20%, transparent);
}
.verdict.ok   { color: var(--ok);   background: var(--ok-wash);   border-color: color-mix(in srgb, var(--ok) 26%, var(--line)); }
.verdict.warn { color: var(--warn); background: var(--warn-wash); border-color: color-mix(in srgb, var(--warn) 26%, var(--line)); }
.verdict.err  { color: var(--err);  background: var(--err-wash);  border-color: color-mix(in srgb, var(--err) 26%, var(--line)); }

/* ------------------------------------------------------------------ findings */
.findings {
  margin-top: 8px;
  border: 1px solid var(--line); border-radius: var(--radius-s);
  background: var(--surface-2);
  padding: 10px 14px;
  font: 400 12px/1.7 var(--mono);
}
.findings div { padding: 1px 0; display: flex; gap: 8px; align-items: baseline; }
.findings div::before {
  content: ""; flex: none; width: 5px; height: 5px; border-radius: 50%;
  margin-top: 6px; background: var(--ink-faint);
}
.findings .ERROR { color: var(--err); }   .findings .ERROR::before { background: var(--err); }
.findings .WARN  { color: var(--warn); }  .findings .WARN::before  { background: var(--warn); }
.findings .INFO  { color: var(--ink-soft); }
.findings .OK    { color: var(--ok); }    .findings .OK::before    { background: var(--ok); }
.findings .head  { color: var(--ink); font-weight: 600; }
.findings .head::before { background: transparent; }

/* -------------------------------------------------- double-signature chain */
.manifest-head {
  margin: 16px 0 8px; font: 600 12px/1.4 var(--sans);
  letter-spacing: .01em; color: var(--ink-soft);
}
.manifest-head.warn { color: var(--warn); }
.manifest-mark { margin-top: 10px; }
.manifest-mark-title {
  font: 600 12px/1.4 var(--mono);
  padding: 6px 10px; border-radius: var(--radius-s) var(--radius-s) 0 0;
  border: 1px solid var(--line); border-bottom: none;
}
.manifest-mark-title.OK    { color: var(--ok);  background: var(--ok-wash); }
.manifest-mark-title.ERROR { color: var(--err); background: var(--err-wash); }
.manifest-mark-title.INFO  { color: var(--ink-soft); background: var(--surface-2); }
.manifest-mark .kv { margin-top: 0; border-radius: 0 0 var(--radius-s) var(--radius-s); }

.hint {
  color: var(--ink-faint); font: 400 11.5px/1.5 var(--sans); letter-spacing: 0;
}
#v-notes, #l-notes {
  margin-top: 12px; color: var(--ink-soft);
  font: 400 12.5px/1.6 var(--sans); white-space: pre-wrap;
}
#v-notes:empty, #l-notes:empty { display: none; }

.viz-toggle {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin: 0 0 8px; font-size: 12px; color: var(--ink-soft);
}
.viz-toggle label { margin: 0; font-weight: 400; display: flex; align-items: center; gap: 6px; }
.viz-toggle input { width: auto; accent-color: var(--accent); }

.opt-check {
  display: flex; align-items: flex-start; gap: 8px;
  margin: 12px 0 4px; font-weight: 400; font-size: 12px;
  line-height: 1.5; color: var(--ink-soft);
}
.opt-check input { width: auto; margin-top: 2px; accent-color: var(--accent); flex: none; }

/* ------------------------------------------------------------------ selectors (tab d) */
.selector-block {
  border: 1px solid var(--line); border-radius: var(--radius-s);
  padding: 14px 16px; margin: 12px 0; background: var(--surface-2);
}
.selector-block h3 {
  margin: 0 0 8px; font: 600 12.5px/1.4 var(--mono); color: var(--ink);
  letter-spacing: 0;
}
.selector-block pre { background: var(--surface); }

/* ------------------------------------------------------------------ misc */
.err-msg {
  color: var(--err); font-size: 13px; margin-top: 14px;
  padding: 9px 12px; border-radius: var(--radius-s);
  background: var(--err-wash); border: 1px solid color-mix(in srgb, var(--err) 24%, var(--line));
}
.err-msg.hidden, .hidden { display: none; }

footer {
  margin-top: 8px; padding: 26px 0 60px;
  color: var(--ink-faint); font-size: 12px; line-height: 1.7;
  border-top: 1px solid var(--line-soft);
}

@media (max-width: 560px) {
  header { padding-top: 36px; }
  header h1 { font-size: 25px; }
  .card { padding: 20px; }
  .kv div { grid-template-columns: 1fr; gap: 2px; }
}