/* ============================================================
   theadminstack.com/itops/dns-dhcp-planner — ScopeForge styles
   OSINT Design System v2 · portfolio_v2_style.md
   Self-contained component set (mirrors the CIDR tool) + planner UI.
   ============================================================ */

/* ── Tokens (light) ─────────────────────────────────────────── */
:root {
  --bg:   #f9fafb; --bg-1: #ffffff; --bg-2: #f3f4f6; --bg-3: #e5e7eb;
  --text: #111827; --text-2: #4b5563; --text-3: #9ca3af;
  --border: #e5e7eb; --border-2: #d1d5db;
  --accent: #111827; --accent-inv: #ffffff; --accent-subtle: #f3f4f6; --accent-glow: rgba(17,24,39,.08);
  --r-sm: 6px; --r: 10px; --r-lg: 14px; --r-pill: 9999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --green: #16a34a; --orange: #d97706; --red: #dc2626;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
  --t-mid: 150ms ease;
  /* role colours for the IP map */
  --role-network:  #6b7280;
  --role-gateway:  #2563eb;
  --role-static:   #7c3aed;
  --role-pool:     #16a34a;
  --role-excluded: #d97706;
  --role-reserved: #0891b2;
  --role-free:     #d1d5db;
}
html.dark {
  --bg: #0f1117; --bg-1: #161b22; --bg-2: #21262d; --bg-3: #30363d;
  --text: #f0f6fc; --text-2: #8b949e; --text-3: #484f58;
  --border: #30363d; --border-2: #3d444d;
  --accent: #f0f6fc; --accent-inv: #0f1117; --accent-subtle: #21262d; --accent-glow: rgba(240,246,252,.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.35);
  --role-free: #30363d;
}

/* ── Tabs ────────────────────────────────────────────────────── */
.tab-bar {
  display: flex; gap: .25rem; background: var(--bg-1);
  border: 1px solid var(--border); border-radius: var(--r);
  padding: 3px; margin-bottom: 1.75rem; overflow-x: auto;
  -webkit-overflow-scrolling: touch; box-shadow: var(--shadow-sm);
}
.tab-btn {
  flex: 1; min-width: 0; background: none; border: none; border-radius: var(--r-sm);
  padding: 7px 14px; font-family: var(--font-body); font-size: .8125rem; font-weight: 500;
  color: var(--text-2); cursor: pointer; white-space: nowrap;
  transition: color var(--t-mid), background var(--t-mid);
  display: flex; align-items: center; justify-content: center; gap: .375rem;
}
.tab-btn:hover { color: var(--text); background: var(--accent-subtle); }
.tab-btn.active { background: var(--accent); color: var(--accent-inv); }
.tab-icon { font-size: .875rem; }
.tab-panel { display: block; }
.tab-panel[hidden] { display: none; }

/* ── Card ────────────────────────────────────────────────────── */
.card {
  background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--r);
  padding: 20px 24px; margin-bottom: 1.25rem; box-shadow: var(--shadow-sm);
  transition: border-color var(--t-mid);
}
.card:hover { border-color: var(--border-2); }
.card-title {
  font-size: .775rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
  color: var(--text-3); margin-bottom: 1rem;
}
.card-sub { font-size: .8rem; color: var(--text-3); margin: -.5rem 0 1rem; font-weight: 400; text-transform: none; letter-spacing: 0; }

/* ── Forms ───────────────────────────────────────────────────── */
.input-row { display: flex; gap: .625rem; align-items: flex-end; flex-wrap: wrap; }
.input-group { display: flex; flex-direction: column; gap: .375rem; flex: 1; min-width: 160px; }
.field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: .875rem; }
label { font-size: .775rem; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; color: var(--text-2); }
input[type="text"], input[type="number"], select, textarea {
  width: 100%; font-family: var(--font-mono); font-size: .9rem; background: var(--bg);
  border: 1px solid var(--border-2); border-radius: var(--r-sm); padding: 8px 12px;
  color: var(--text); outline: none; transition: border-color var(--t-mid), box-shadow var(--t-mid);
}
select { font-family: var(--font-body); }
input:focus, select:focus, textarea:focus { border-color: var(--text-3); box-shadow: 0 0 0 3px var(--accent-glow); }
input::placeholder, textarea::placeholder { color: var(--text-3); }
textarea { font-size: .85rem; resize: vertical; min-height: 64px; }
.field-hint { font-size: .78rem; color: var(--text-3); margin-top: .35rem; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-body);
  font-size: .875rem; font-weight: 500; border: 1px solid transparent; border-radius: var(--r-sm);
  padding: 8px 18px; cursor: pointer; white-space: nowrap;
  transition: opacity var(--t-mid), background var(--t-mid), border-color var(--t-mid), color var(--t-mid);
}
.btn:active { opacity: .85; }
.btn-primary { background: var(--accent); color: var(--accent-inv); border-color: var(--accent); }
.btn-primary:hover { opacity: .88; }
.btn-ghost { background: transparent; color: var(--text-2); border-color: var(--border); }
.btn-ghost:hover { color: var(--text); border-color: var(--border-2); background: var(--bg-2); }
.btn-sm { padding: 5px 12px; font-size: .8rem; }

/* ── Examples ────────────────────────────────────────────────── */
.examples { display: flex; flex-wrap: wrap; gap: .375rem; margin-top: .875rem; align-items: center; }
.examples-label { font-size: .75rem; color: var(--text-3); margin-right: .25rem; }
.example-btn {
  font-size: .75rem; font-family: var(--font-mono); background: var(--bg-2);
  border: 1px solid var(--border); border-radius: var(--r-pill); padding: 4px 10px;
  cursor: pointer; color: var(--text-2);
  transition: background var(--t-mid), color var(--t-mid), border-color var(--t-mid);
}
.example-btn:hover { background: var(--bg-3); color: var(--text); border-color: var(--border-2); }

/* ── Result area / table ─────────────────────────────────────── */
.result-area {
  background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--r);
  padding: 20px; min-height: 60px; transition: border-color var(--t-mid), box-shadow var(--t-mid);
}
.result-area:empty::before { content: 'Results will appear here'; color: var(--text-3); font-size: .875rem; }
.result-area.has-result { box-shadow: var(--shadow-sm); border-color: var(--border-2); }
.result-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.result-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.result-table tr:last-child td { border-bottom: none; }
.result-table tbody tr:hover { background: var(--bg-2); }
.rt-label { color: var(--text-2); font-size: .8125rem; white-space: nowrap; width: 28%; }
.rt-value { color: var(--text); font-weight: 500; width: 34%; }
.rt-note  { color: var(--text-3); font-size: .8rem; }
.mono { font-family: var(--font-mono); }
.txt-green { color: var(--green); font-weight: 600; }
.txt-red   { color: var(--red);   font-weight: 600; }

/* ── Alerts / tags ───────────────────────────────────────────── */
.alert { border-radius: var(--r-sm); padding: 12px 16px; font-size: .875rem; display: flex; align-items: flex-start; gap: .5rem; border: 1px solid; }
.alert-error { background: color-mix(in srgb, #dc2626 10%, transparent); color: #dc2626; border-color: color-mix(in srgb, #dc2626 30%, transparent); }
.alert-warn  { background: color-mix(in srgb, #d97706 12%, transparent); color: #b45309; border-color: color-mix(in srgb, #d97706 30%, transparent); }
html.dark .alert-warn { color: #f59e0b; }
.alert-icon { font-weight: 700; flex-shrink: 0; }

/* ── Utilisation bar ─────────────────────────────────────────── */
.util-wrap { margin-top: 1.1rem; }
.util-head { display: flex; justify-content: space-between; font-size: .78rem; color: var(--text-2); margin-bottom: .35rem; }
.util-track { height: 10px; background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--r-pill); overflow: hidden; }
.util-fill { height: 100%; border-radius: var(--r-pill); transition: width var(--t-mid); }

/* ── IP map ──────────────────────────────────────────────────── */
.map-legend { display: flex; flex-wrap: wrap; gap: .75rem 1.1rem; margin-bottom: 1.1rem; }
.legend-item { display: inline-flex; align-items: center; gap: .4rem; font-size: .78rem; color: var(--text-2); }
.legend-swatch { width: 13px; height: 13px; border-radius: 3px; border: 1px solid rgba(0,0,0,.12); flex-shrink: 0; }
.role-network  { background: var(--role-network); }
.role-broadcast{ background: var(--role-network); }
.role-gateway  { background: var(--role-gateway); }
.role-static   { background: var(--role-static); }
.role-pool     { background: var(--role-pool); }
.role-excluded { background: var(--role-excluded); }
.role-reserved { background: var(--role-reserved); }
.role-free     { background: var(--role-free); }

.ip-grid { display: grid; grid-template-columns: repeat(16, 1fr); gap: 3px; margin-bottom: .9rem; }
@media (max-width: 640px) { .ip-grid { grid-template-columns: repeat(8, 1fr); } }
.ip-cell {
  aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: .62rem; color: #fff; border-radius: 3px;
  cursor: default; user-select: none; line-height: 1; overflow: hidden;
}
.ip-cell.role-free { color: var(--text-3); }
.ip-cell.role-reserved { outline: 2px solid var(--role-reserved); outline-offset: -2px; }

.band-view { display: flex; height: 46px; border-radius: var(--r-sm); overflow: hidden; border: 1px solid var(--border); margin-bottom: .9rem; }
.band { display: flex; align-items: center; justify-content: center; min-width: 0; color: #fff; font-size: .7rem; font-family: var(--font-mono); }
.band span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding: 0 4px; }

.map-note { font-size: .78rem; color: var(--text-3); margin-bottom: 1rem; }
.map-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: .6rem; }
@media (max-width: 560px) { .map-stats { grid-template-columns: repeat(2, 1fr); } }
.map-stat { background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 10px 12px; text-align: center; }
.map-stat-v { font-size: 1.05rem; font-weight: 600; color: var(--text); }
.map-stat-l { font-size: .72rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .03em; margin-top: 2px; }

/* ── Reservations table ──────────────────────────────────────── */
.resv-table { width: 100%; border-collapse: collapse; font-size: .85rem; margin-top: 1rem; }
.resv-table th { text-align: left; font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-3); padding: 8px 10px; border-bottom: 1px solid var(--border); }
.resv-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.resv-table tr:last-child td { border-bottom: none; }
.resv-bad td { background: color-mix(in srgb, #dc2626 6%, transparent); }
.resv-empty { color: var(--text-3); text-align: center; padding: 18px !important; font-size: .85rem; }
.resv-add-row { display: grid; grid-template-columns: 1.2fr 1.4fr 1.2fr auto; gap: .5rem; align-items: end; }
@media (max-width: 640px) { .resv-add-row { grid-template-columns: 1fr; } }

/* ── DNS code blocks ─────────────────────────────────────────── */
.dns-block { margin-bottom: 1.25rem; }
.dns-block:last-child { margin-bottom: 0; }
.dns-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: .5rem; font-size: .78rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--text-3); }
pre.code {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 14px 16px; overflow-x: auto; font-family: var(--font-mono); font-size: .78rem;
  line-height: 1.55; color: var(--text); white-space: pre; margin: 0;
}

/* ── Export grid ─────────────────────────────────────────────── */
.export-lead { font-size: .9rem; color: var(--text-2); margin-bottom: 1.1rem; line-height: 1.6; }
.export-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: .75rem; }
.export-card { display: flex; align-items: center; justify-content: space-between; gap: 1rem; background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 14px 16px; }
.export-title { font-weight: 600; font-size: .9rem; color: var(--text); }
.export-desc { font-size: .75rem; color: var(--text-3); font-family: var(--font-mono); margin-top: 2px; }

/* ── FAQ (mirrors cidr) ──────────────────────────────────────── */
.faq-section .faq-list { display: flex; flex-direction: column; gap: .5rem; max-width: 60rem; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: .5rem; padding: .25rem .9rem; background: var(--bg-1); }
.faq-item summary { cursor: pointer; font-weight: 600; padding: .65rem 0; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--text-3); font-weight: 400; }
.faq-item[open] summary::after { content: "\2013"; }
.faq-item p { margin: 0 0 .8rem; color: var(--text-2); line-height: 1.6; }
.related-tools { text-align: center; margin-top: 1.5rem; color: var(--text-3); }