:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1a2333;
  --text-dim: #5b6b82;
  --accent: #0f6cbd;
  --accent-strong: #0b5394;
  --ok: #1a7f37;
  --error: #b42318;
  --error-bg: #fef3f2;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

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

.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 22px 0;
}
.site-header h1 { margin: 0; font-size: 26px; letter-spacing: -.02em; }
.site-header .accent { color: var(--accent); }
.site-header .subtitle { margin: 4px 0 0; color: var(--text-dim); font-size: 14px; }

/* ---------- tabs ---------- */
.tabs {
  display: flex;
  gap: 4px;
  margin: 24px 0 0;
  border-bottom: 1px solid var(--border);
}
.tab {
  appearance: none;
  border: 0;
  background: none;
  padding: 12px 18px;
  font: inherit;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- panels ---------- */
.panel { display: none; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin: 20px 0 40px; }
.panel.active { display: block; }

.hint { margin: 0 0 16px; color: var(--text-dim); }
code { font-family: var(--mono); font-size: 13px; background: #eef2f7; border-radius: 4px; padding: 1px 5px; }

/* ---------- buttons / toolbar ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid transparent; border-radius: 8px;
  padding: 9px 16px; font: inherit; font-weight: 600; cursor: pointer;
  transition: background .15s, border-color .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-strong); }
.btn-primary:disabled { opacity: .55; cursor: default; }
.btn-secondary { background: #fff; color: var(--accent); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--accent); }
.btn-ghost { background: transparent; color: var(--text-dim); }
.btn-ghost:hover { color: var(--text); }

.toolbar { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.actions { display: flex; align-items: center; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.status { color: var(--text-dim); font-size: 13px; }

/* ---------- inputs ---------- */
textarea,
input[type="text"],
input[type="password"],
input[type="email"],
input[type="search"],
input[type="number"],
select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-sizing: border-box;
  padding: 10px 12px;
}

/* однострочные поля — строго одинаковая высота */
input[type="text"],
input[type="password"],
input[type="email"],
input[type="search"],
input[type="number"],
select {
  height: 44px;
  padding-top: 0;
  padding-bottom: 0;
  vertical-align: middle;
}

/* у number-поля убираем нативные спиннеры (они ломают высоту) */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; appearance: textfield; }

/* убираем нативный вид select, чтобы он совпадал с input */
select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  line-height: 42px;
  padding-left: 12px;
  padding-right: 36px;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235b6b82' d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 12px 8px;
}

textarea {
  font-family: var(--mono);
  font-size: 13px;
  resize: vertical;
  min-height: 160px;
}
textarea:focus, input:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.grid-probe { grid-template-columns: 2fr 1.6fr 1.1fr .8fr; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text-dim); margin-bottom: 6px; }

.flags { display: flex; gap: 18px; margin: 14px 0 4px; flex-wrap: wrap; }
.check { display: inline-flex; align-items: center; gap: 6px; color: var(--text); cursor: pointer; }
.check input { accent-color: var(--accent); }

.examples { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 12px 0 4px; }
.examples-label { color: var(--text-dim); font-size: 13px; }
.examples button {
  appearance: none; border: 1px solid var(--border); background: #fff; color: var(--accent);
  border-radius: 999px; padding: 4px 12px; font-size: 13px; cursor: pointer;
}
.examples button:hover { border-color: var(--accent); }

/* ---------- results ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; margin-bottom: 16px; }
.card { border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; overflow-wrap: anywhere; }
.card .k { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--text-dim); margin-bottom: 4px; }
.card .v { font-family: var(--mono); font-size: 13px; }
.card.full { grid-column: 1 / -1; }

.raw { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.raw summary { cursor: pointer; padding: 10px 14px; font-weight: 600; background: #f8fafc; }
.raw pre, .raw-pre {
  margin: 0; padding: 14px; background: #0d1421; color: #d7e2f0;
  font-family: var(--mono); font-size: 12.5px; line-height: 1.5;
  overflow: auto; max-height: 560px; white-space: pre;
}
.cmd {
  font-family: var(--mono); font-size: 13px; color: var(--accent);
  background: #eef5fd; border: 1px solid #d5e6f8; border-radius: 8px;
  padding: 10px 14px; margin-bottom: 10px; overflow-wrap: anywhere;
}
#dig-result { margin-top: 16px; }

/* ---------- errors ---------- */
.error {
  margin-top: 14px; padding: 12px 14px; border-radius: 8px;
  background: var(--error-bg); color: var(--error); border: 1px solid #f2c7c4;
  font-size: 14px; white-space: pre-wrap;
}

/* ---------- footer ---------- */
footer { color: var(--text-dim); font-size: 13px; padding: 0 20px 30px; }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .site-header h1 { font-size: 22px; }
}

/* ---------- header row / logout ---------- */
.header-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.logout-form { margin: 0; flex: none; }
.logout-form .btn { white-space: nowrap; }

/* ---------- login page ---------- */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 24px;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 8px 30px rgba(16, 24, 40, .10);
  padding: 32px 28px 24px;
  width: min(380px, 100%);
}
.login-card h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: -.02em; }
.login-card .accent { color: var(--accent); }
.login-sub { color: var(--text-dim); margin: 0 0 20px; font-size: 14px; }
.login-card .field { display: block; margin-bottom: 14px; }
.login-card .field span {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--text-dim); margin-bottom: 6px;
}
.login-card .btn { width: 100%; justify-content: center; margin-top: 4px; height: 44px; }
.login-card .error { margin: 0 0 16px; }
.login-foot { color: var(--text-dim); font-size: 12px; margin: 18px 0 0; text-align: center; }