:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --border: #e5e5e5;
  --border-strong: #d4d4d4;
  --text: #171717;
  --muted: #737373;
  --ok: #15803d;
  --ok-bg: #f0fdf4;
  --bad: #b91c1c;
  --bad-bg: #fef2f2;
  --warn: #a16207;
  --warn-bg: #fefce8;
  --accent: #171717;
  --accent-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --surface: #131313;
    --border: #262626;
    --border-strong: #383838;
    --text: #ededed;
    --muted: #8f8f8f;
    --ok: #4ade80;
    --ok-bg: #0f1f14;
    --bad: #f87171;
    --bad-bg: #1f1111;
    --warn: #fbbf24;
    --warn-bg: #1f1a0d;
    --accent: #ededed;
    --accent-text: #0a0a0a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 56px 20px 64px;
}

/* --- шапка --- */
.head { margin-bottom: 28px; }

.brand {
  display: inline-block;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.tld { color: var(--muted); font-weight: 400; }

.brand-link { text-decoration: none; color: inherit; }
.brand-link:hover .brand { opacity: .75; }

.back { margin: 20px 0 0; font-size: 14px; }
.back a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.back a:hover { color: var(--text); }

.tagline {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 15px;
}

/* --- форма --- */
.panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 20px;
}

.label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 8px;
}

.row { display: flex; gap: 8px; }

.input {
  flex: 1;
  min-width: 0;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font: 15px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.input:focus {
  outline: none;
  border-color: var(--text);
}
.input::placeholder { color: var(--muted); opacity: .6; }

.btn {
  height: 40px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { opacity: .85; }
.btn:disabled { opacity: .5; cursor: default; }

.hints {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}
.link {
  border: 0;
  background: none;
  padding: 0;
  font: inherit;
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}
.link:hover { color: var(--text); }
.sep { opacity: .5; }

.error {
  margin: 12px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-left: 2px solid var(--bad);
  border-radius: 4px;
  background: var(--bad-bg);
  color: var(--bad);
  font-size: 14px;
}

/* --- результат --- */
.result { margin-top: 20px; }

.verdict {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  border: 1px solid var(--border);
  border-left-width: 3px;
  border-radius: 8px;
  padding: 18px 20px;
  background: var(--surface);
}
.verdict-body { min-width: 0; flex: 1; }

/* лев по настроению вердикта */
.lion {
  flex: none;
  order: 2;
  width: 104px;
  height: 104px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.verdict.clean   { border-left-color: var(--ok);   background: var(--ok-bg); }
.verdict.blocked,
.verdict.blocked_tls { border-left-color: var(--bad);  background: var(--bad-bg); }
.verdict.unknown,
.verdict.error   { border-left-color: var(--warn); background: var(--warn-bg); }

.verdict-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
  background: var(--muted);
}
.clean   .dot { background: var(--ok); }
.blocked .dot, .blocked_tls .dot { background: var(--bad); }
.unknown .dot, .error .dot { background: var(--warn); }

.verdict-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.clean   .verdict-title { color: var(--ok); }
.blocked .verdict-title, .blocked_tls .verdict-title { color: var(--bad); }
.unknown .verdict-title, .error .verdict-title { color: var(--warn); }

.verdict-detail {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.55;
}

.verdict-ip {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--muted);
}
.verdict-ip code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--text);
}

/* --- пробы --- */
.probes {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.probe {
  padding: 13px 16px;
  font-size: 14px;
  background: var(--surface);
}
.probe + .probe { border-top: 1px solid var(--border); }

.probe-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}
.probe-name { font-weight: 500; }
.probe-role { color: var(--muted); font-size: 12px; }

.probe-status { margin-left: auto; font-weight: 500; }
.probe-status.up   { color: var(--ok); }
.probe-status.down { color: var(--bad); }
.probe-status.fail { color: var(--warn); }

/* строка одного сигнала: пинг или TLS */
.signal {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding: 5px 0;
}
.signal + .signal { border-top: 1px dashed var(--border); }

.signal-name {
  flex: none;
  width: 76px;
  color: var(--muted);
  font-size: 12.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.signal-status { font-size: 13.5px; font-weight: 500; }
.signal-status.up   { color: var(--ok); }
.signal-status.down { color: var(--bad); }
.signal-status.warn { color: var(--warn); }

.signal-stats {
  flex-basis: 100%;
  padding-left: 86px;
  color: var(--muted);
  font-size: 12.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  word-break: break-word;
}

/* карточка сертификата */
.cert {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 14px 16px;
}
.cert-head {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
}
.cert-row {
  display: flex;
  gap: 12px;
  padding: 4px 0;
  font-size: 13px;
}
.cert-key {
  flex: none;
  width: 150px;
  color: var(--muted);
}
.cert-val {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  word-break: break-word;
}

/* --- объяснение --- */
.explain {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.explain h3 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
}
.explain p { margin: 0 0 14px; color: var(--muted); line-height: 1.6; }
.explain b { color: var(--text); font-weight: 500; }

.matrix {
  width: 100%;
  border-collapse: collapse;
  margin: 4px 0 14px;
  font-size: 13px;
}
.matrix th, .matrix td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.matrix th {
  color: var(--muted);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.matrix td { color: var(--text); }
.matrix td.ok  { color: var(--ok); }
.matrix td.bad { color: var(--bad); }

.note { font-size: 13px; }

.foot {
  margin-top: 40px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 480px) {
  .wrap { padding: 32px 16px 48px; }
  .row { flex-direction: column; }
  .btn { width: 100%; }
  .probe-status { margin-left: 0; }

  .verdict { flex-direction: column; }
  .lion { order: 0; width: 88px; height: 88px; }

  .signal-name { width: auto; }
  .signal-stats { padding-left: 0; }
  .cert-row { flex-direction: column; gap: 2px; }
  .cert-key { width: auto; }
}