/* BB Net Tools: shared styles for the free Subnet Calculator, Port Lookup and Binary/Hex Converter.
   Scoped to .nt-* classes. Colors come from the theme tokens with hard Cyber Elite fallbacks. */
.nt-shell {
  --nt-bg: var(--theme-page, #05080a);
  --nt-panel: var(--theme-surface, #0f161b);
  --nt-inset: var(--theme-inset, #05080a);
  --nt-text: var(--theme-ink, #eceff1);
  --nt-muted: var(--theme-muted, #90a4ae);
  --nt-accent: var(--theme-primary, #00c853);
  --nt-on-accent: var(--theme-on-primary, #000000);
  --nt-warn: var(--theme-warning, #ffd600);
  --nt-error: var(--theme-error, #ff5252);
  --nt-info: var(--theme-info, #00b0ff);
  --nt-line: color-mix(in srgb, var(--nt-text) 16%, transparent);
  color: var(--nt-text);
  box-sizing: border-box;
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 18px 70px;
}
body { background: var(--theme-page, #05080a); color: var(--theme-ink, #eceff1); overflow-x: hidden; }
.nt-shell *, .nt-shell *::before, .nt-shell *::after { box-sizing: border-box; }
.nt-shell [hidden] { display: none !important; }

/* Hero */
.nt-eyebrow { font: 500 14px/1.5 var(--font-code, 'JetBrains Mono', monospace); letter-spacing: 2px; color: var(--nt-accent); margin: 0; text-transform: uppercase; }
.nt-hero { padding: 10px 0 26px; }
.nt-hero h1 { font-size: clamp(34px, 6vw, 60px); line-height: 1.1; margin: 12px 0; overflow-wrap: anywhere; }
.nt-hero h1 span { color: var(--nt-accent); }
.nt-lead { max-width: 720px; color: var(--nt-muted); font-size: 18px; line-height: 1.6; margin: 0; }
.nt-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; padding: 0; list-style: none; }
.nt-tags li { font: 500 14px var(--font-code, monospace); border: 1px solid var(--nt-line); border-radius: 5px; padding: 5px 9px; color: var(--nt-muted); }

/* Tabs */
.nt-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; }
.nt-tab { min-height: 44px; padding: 10px 16px; border: 1px solid var(--nt-line); border-radius: 8px; background: var(--nt-panel); color: var(--nt-text); font: 700 15px var(--font-body, 'Geist', sans-serif); cursor: pointer; }
.nt-tab[aria-selected="true"] { background: var(--nt-accent); color: var(--nt-on-accent); border-color: var(--nt-accent); }
.nt-tab:hover { border-color: var(--nt-accent); }

/* Panels & layout */
.nt-panel { background: var(--nt-panel); border: 1px solid var(--nt-line); border-radius: 14px; padding: 22px; margin-bottom: 20px; min-width: 0; }
.nt-panel > h2, .nt-panel-head h2 { font-size: 22px; line-height: 1.3; margin: 6px 0 14px; }
.nt-panel h3 { font-size: 17px; line-height: 1.35; margin: 18px 0 10px; }
.nt-panel p { line-height: 1.65; }
.nt-panel-accent { border-top: 3px solid var(--nt-accent); }
.nt-grid-2 { display: grid; gap: 20px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .nt-grid-2 { grid-template-columns: minmax(0, 380px) minmax(0, 1fr); align-items: start; } }
.nt-small, .nt-shell .nt-small { font-size: 15px; color: var(--nt-muted); line-height: 1.6; }

/* Forms */
.nt-shell label, .nt-label { display: block; font-size: 15px; font-weight: 600; margin: 14px 0 6px; }
.nt-shell input[type="text"], .nt-shell input[type="number"], .nt-shell input[type="search"], .nt-shell select, .nt-shell textarea {
  width: 100%; min-width: 0; min-height: 46px; padding: 10px 12px; border: 1px solid var(--nt-line); border-radius: 8px;
  background: var(--nt-inset); color: var(--nt-text); font: 500 16px var(--font-body, 'Geist', sans-serif); color-scheme: dark;
}
html[data-bb-theme="patriotic"] .nt-shell :is(input, select, textarea) { color-scheme: light; }
.nt-shell textarea { min-height: 90px; resize: vertical; }
.nt-mono, .nt-shell input.nt-mono { font-family: var(--font-code, 'JetBrains Mono', monospace) !important; }
.nt-row { display: grid; gap: 12px; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.nt-row > * { min-width: 0; }
.nt-row label { margin-top: 0; }
.nt-field-msg { min-height: 1.4em; margin: 6px 0 0; font-size: 15px; color: var(--nt-error); }
.nt-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.nt-btn { min-height: 44px; padding: 10px 16px; border: 1px solid var(--nt-line); border-radius: 8px; background: var(--nt-inset); color: var(--nt-text); font: 700 15px var(--font-body, 'Geist', sans-serif); cursor: pointer; }
.nt-btn:hover { border-color: var(--nt-accent); color: var(--nt-accent); }
.nt-btn-primary { background: var(--nt-accent); color: var(--nt-on-accent); border-color: var(--nt-accent); }
.nt-btn-primary:hover { color: var(--nt-on-accent); filter: brightness(1.1); }
.nt-btn:disabled { opacity: .55; cursor: not-allowed; }
.nt-shell :focus-visible { outline: 3px solid var(--theme-focus, #ffd600); outline-offset: 3px; }
.nt-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.nt-chip { min-height: 40px; padding: 8px 12px; border: 1px solid var(--nt-line); border-radius: 999px; background: var(--nt-inset); color: var(--nt-text); font: 600 15px var(--font-body, 'Geist', sans-serif); cursor: pointer; }
.nt-chip[aria-pressed="true"] { background: color-mix(in srgb, var(--nt-accent) 22%, var(--nt-inset)); border-color: var(--nt-accent); color: var(--nt-text); }
.nt-check { display: flex !important; align-items: center; gap: 10px; font-weight: 500 !important; cursor: pointer; }
.nt-check input { width: 20px; height: 20px; accent-color: var(--nt-accent); }

/* Result key/value grid */
.nt-kv { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; margin: 0; }
@media (min-width: 560px) { .nt-kv { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); column-gap: 24px; } }
.nt-kv > div { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--nt-line); min-width: 0; }
.nt-kv dt { color: var(--nt-muted); font-size: 15px; }
.nt-kv dd { margin: 0; font: 600 16px var(--font-code, 'JetBrains Mono', monospace); text-align: right; overflow-wrap: anywhere; min-width: 0; }
.nt-flags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 4px; padding: 0; list-style: none; }
.nt-flag { font: 600 14px var(--font-code, monospace); border: 1px solid var(--nt-line); border-radius: 5px; padding: 5px 9px; color: var(--nt-muted); }
.nt-flag.on { border-color: var(--nt-accent); color: var(--nt-accent); }
.nt-flag.warn { border-color: var(--nt-warn); color: var(--nt-warn); }
.nt-note { border-left: 3px solid var(--nt-info); padding: 8px 12px; margin: 12px 0; font-size: 15px; line-height: 1.6; background: color-mix(in srgb, var(--nt-info) 7%, transparent); }

/* Binary strip */
.nt-binary { font: 500 16px/1.9 var(--font-code, 'JetBrains Mono', monospace); overflow-x: auto; padding: 10px 12px; background: var(--nt-inset); border: 1px solid var(--nt-line); border-radius: 8px; max-width: 100%; }
.nt-binary .row { white-space: nowrap; display: flex; gap: 12px; align-items: baseline; }
.nt-binary .lbl { display: inline-block; min-width: 76px; color: var(--nt-muted); font-size: 14px; }
.nt-binary .net { color: var(--nt-accent); font-weight: 700; }
.nt-binary .host { color: var(--nt-warn); }
.nt-binary .dot { color: var(--nt-muted); }
.nt-legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: 15px; margin-top: 8px; color: var(--nt-muted); }
.nt-legend b.net { color: var(--nt-accent); } .nt-legend b.host { color: var(--nt-warn); }

/* Tables */
.nt-table-wrap { max-width: 100%; overflow-x: auto; border: 1px solid var(--nt-line); border-radius: 10px; }
.nt-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.nt-table th, .nt-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--nt-line); vertical-align: top; }
.nt-table th { font-size: 14px; letter-spacing: 1px; text-transform: uppercase; color: var(--nt-muted); background: var(--nt-inset); position: sticky; top: 0; }
.nt-table td.mono, .nt-table .mono { font-family: var(--font-code, 'JetBrains Mono', monospace); white-space: nowrap; }
.nt-table tr:last-child td { border-bottom: 0; }
.nt-badge { display: inline-block; font: 600 13px/1.3 var(--font-code, monospace); border: 1px solid var(--nt-line); border-radius: 4px; padding: 3px 6px; margin: 2px 4px 2px 0; color: var(--nt-muted); white-space: nowrap; }
.nt-badge.ap { border-color: var(--theme-info, #00b0ff); color: var(--theme-info, #00b0ff); }
.nt-badge.np { border-color: var(--nt-accent); color: var(--nt-accent); }
.nt-badge.sp { border-color: var(--nt-warn); color: var(--nt-warn); }
.nt-badge.xx { border-style: dashed; }

/* Quiz */
.nt-quiz-card { background: var(--nt-inset); border: 1px solid var(--nt-line); border-radius: 12px; padding: 20px; }
.nt-quiz-q { font-size: 19px; line-height: 1.5; margin: 6px 0 14px; font-weight: 600; overflow-wrap: anywhere; }
.nt-choices { display: grid; gap: 10px; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.nt-choice { min-height: 52px; padding: 10px 12px; border: 1px solid var(--nt-line); border-radius: 8px; background: var(--nt-panel); color: var(--nt-text); font: 700 16px var(--font-code, 'JetBrains Mono', monospace); cursor: pointer; overflow-wrap: anywhere; }
.nt-choice:hover:not(:disabled) { border-color: var(--nt-accent); }
.nt-choice.correct { border-color: var(--nt-accent); background: color-mix(in srgb, var(--nt-accent) 18%, var(--nt-panel)); }
.nt-choice.wrong { border-color: var(--nt-error); background: color-mix(in srgb, var(--nt-error) 14%, var(--nt-panel)); }
.nt-choice:disabled { cursor: default; }
.nt-feedback { margin-top: 14px; padding: 12px 14px; border-radius: 8px; border: 1px solid var(--nt-line); line-height: 1.65; font-size: 16px; }
.nt-feedback.ok { border-color: var(--nt-accent); }
.nt-feedback.no { border-color: var(--nt-error); }
.nt-feedback strong { display: block; margin-bottom: 4px; }
.nt-feedback pre, .nt-work { font: 500 15px/1.7 var(--font-code, 'JetBrains Mono', monospace); white-space: pre-wrap; overflow-wrap: anywhere; margin: 8px 0 0; }
.nt-score { display: flex; flex-wrap: wrap; gap: 18px; font: 600 15px var(--font-code, monospace); color: var(--nt-muted); margin-bottom: 10px; }
.nt-score b { color: var(--nt-accent); }
.nt-answer-row { display: flex; gap: 10px; flex-wrap: wrap; }
.nt-answer-row input { flex: 1 1 200px; }
.nt-flashcard { min-height: 180px; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 22px; border: 1px dashed var(--nt-accent); border-radius: 12px; background: var(--nt-inset); }
.nt-flashcard .front { font-size: 20px; font-weight: 600; line-height: 1.5; }
.nt-flashcard .back { margin-top: 14px; font: 700 22px var(--font-code, monospace); color: var(--nt-accent); }
.nt-flashcard .why { margin-top: 8px; color: var(--nt-muted); font-size: 16px; line-height: 1.6; max-width: 560px; }

/* Place-value working */
.nt-steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.nt-steps li { counter-increment: step; position: relative; padding: 8px 0 8px 36px; border-bottom: 1px solid var(--nt-line); font-size: 15px; line-height: 1.6; overflow-wrap: anywhere; }
.nt-steps li::before { content: counter(step); position: absolute; left: 0; top: 8px; width: 24px; height: 24px; border-radius: 50%; background: var(--nt-inset); border: 1px solid var(--nt-accent); color: var(--nt-accent); font: 700 13px/22px var(--font-code, monospace); text-align: center; }
.nt-bits { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 6px; }
.nt-bit { min-height: 64px; border: 1px solid var(--nt-line); border-radius: 8px; background: var(--nt-inset); color: var(--nt-text); cursor: pointer; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; padding: 4px 0; font-family: var(--font-code, monospace) !important; }
.nt-bit .pv { font-size: 13px; color: var(--nt-muted); }
.nt-bit .bv { font-size: 20px; font-weight: 700; }
.nt-bit[aria-pressed="true"] { border-color: var(--nt-accent); background: color-mix(in srgb, var(--nt-accent) 20%, var(--nt-inset)); }
.nt-bit[aria-pressed="true"] .bv { color: var(--nt-accent); }

/* Header spacing (matches the standard return pair). */
.nt-page-header { background: var(--theme-header, #0f161b); border-bottom: 1px solid color-mix(in srgb, var(--theme-ink, #eceff1) 14%, transparent); }

/* Tactical reticle: the shared .cursor markup. Visible on mouse devices at every width; hidden only on touch-primary devices. */
#mainCursor { left: -200px; top: -200px; }
#cursorDot { left: -200px; top: -200px; }
@media (pointer: coarse) {
  #mainCursor, #cursorDot { display: none !important; }
  body { cursor: auto !important; }
}

@media (max-width: 600px) {
  .nt-shell { padding: 18px 12px 60px; }
  .nt-panel { padding: 16px; border-radius: 12px; }
  .nt-row { grid-template-columns: minmax(0, 1fr); }
  .nt-choices { grid-template-columns: minmax(0, 1fr); }
  .nt-tab { flex: 1 1 calc(50% - 8px); padding: 10px 8px; font-size: 14px; }
  .nt-quiz-q { font-size: 17px; }
  .nt-bit { min-height: 56px; }
  .nt-bit .bv { font-size: 17px; }
  .nt-bit .pv { font-size: 12px; }
  /* Card layout for wide tables on phones. */
  .nt-table.nt-stack thead { display: none; }
  .nt-table.nt-stack, .nt-table.nt-stack tbody, .nt-table.nt-stack tr, .nt-table.nt-stack td { display: block; width: 100%; }
  .nt-table.nt-stack tr { border-bottom: 1px solid var(--nt-line); padding: 8px 0; }
  .nt-table.nt-stack td { border: 0; padding: 4px 12px; white-space: normal; }
  .nt-table.nt-stack td[data-label]::before { content: attr(data-label) ": "; color: var(--nt-muted); font: 600 13px var(--font-code, monospace); text-transform: uppercase; letter-spacing: 1px; }
  .nt-table-wrap.nt-stack-wrap { overflow-x: visible; }
}
@media print {
  .nt-tabs, #mainCursor, #cursorDot, .bb-site-footer, .nt-actions { display: none !important; }
}