/* ------------------------------------------------------------------
   Radio tools: airtime and link budget calculators
   ------------------------------------------------------------------ */

.tool { scroll-margin-top: calc(var(--header-h) + 1rem); }

.tool__grid {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
@media (max-width: 960px) { .tool__grid { grid-template-columns: 1fr; } }

.tool__form { display: grid; gap: 1.6rem; }
.tool__row { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: 1rem; }
select.field__input { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 1.1rem) 52%, calc(100% - 0.75rem) 52%; background-size: 0.35rem 0.35rem; background-repeat: no-repeat; padding-right: 2rem; }

.range { width: 100%; accent-color: var(--signal); }

.tool__geo { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem; }

.tool__result {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  display: grid;
  gap: 1.1rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border-radius: var(--radius-lg);
  background: var(--panel);
  color: var(--panel-ink);
}
@media (max-width: 960px) { .tool__result { position: static; } }

.tool__result .eyebrow, .tool__result .fineprint { color: var(--panel-muted); }

.tool__big {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 2rem + 6vw, 7rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.05em;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}
.tool__big small { margin-left: 0.2em; font-size: 0.32em; letter-spacing: 0; color: var(--panel-muted); }

.tool__verdict { font-family: var(--font-display); font-size: var(--step-1); font-style: italic; line-height: 1.35; }
[data-verdict="great"] .tool__big { color: var(--lichen); }
[data-verdict="no"] .tool__big { color: var(--danger); }
:root:not([data-theme="dark"]) [data-verdict="great"] .tool__big { color: #c4d08f; }

.tool__facts { display: grid; margin: 0; }
.tool__facts div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--panel-ink) 13%, transparent);
}
.tool__facts dt { font-size: var(--step--1); color: var(--panel-muted); }
.tool__facts dd { margin: 0; text-align: right; }

.airtime-bar { height: 6px; border-radius: 6px; background: color-mix(in srgb, var(--panel-ink) 12%, transparent); overflow: hidden; }
.airtime-bar span { display: block; height: 100%; width: var(--w, 0%); border-radius: inherit; background: var(--signal); transition: width 0.5s var(--ease-out); }

.profile { width: 100%; height: auto; }
.profile__earth { fill: var(--panel-2); stroke: var(--panel-muted); stroke-width: 1; }
.profile__ground { fill: var(--panel-2); }
.profile__fresnel { fill: color-mix(in srgb, var(--signal) 22%, transparent); stroke: var(--signal); stroke-width: 0.8; stroke-dasharray: 3 3; }
.profile__fresnel.is-blocked { fill: color-mix(in srgb, var(--danger) 30%, transparent); stroke: var(--danger); }
.profile__los { stroke: var(--panel-ink); stroke-width: 1.2; }
.profile__mast { stroke: var(--panel-ink); stroke-width: 2; }
.profile__node { fill: var(--signal); }
.profile__label { fill: var(--panel-muted); font-family: var(--font-mono); font-size: 11px; }

.tool__node { display: grid; gap: 0.4rem; padding: 0.9rem 1rem; border-radius: var(--radius-sm); background: color-mix(in srgb, var(--panel-ink) 7%, transparent); font-size: var(--step--1); line-height: 1.45; }

.compliance { display: grid; gap: 0.35rem; padding: 0.9rem 1rem; border-left: 3px solid var(--panel-muted); border-radius: 4px; background: color-mix(in srgb, var(--panel-ink) 6%, transparent); }
.compliance p.mono { font-size: var(--step--2); line-height: 1.5; }
.compliance[data-state="ok"] { border-left-color: #9fbf6f; }
.compliance[data-state="over"], .compliance[data-state="out"] { border-left-color: var(--danger); }
.compliance[data-state="over"] .compliance__erp, .compliance[data-state="out"] .compliance__band { color: var(--danger); }

.rules { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
@media (max-width: 960px) { .rules { grid-template-columns: 1fr; } }
.prose-plain { display: grid; gap: 1.1rem; max-width: 42rem; line-height: 1.65; color: var(--ink-2); }
.prose-plain strong { color: var(--ink); font-weight: 560; }
.prose-plain code { padding: 0.1em 0.35em; border-radius: 6px; background: var(--paper-2); font-size: 0.86em; }
.rules__table { width: 100%; border-collapse: collapse; font-size: 0.93rem; }
.rules__table caption { display: table-caption; caption-side: top; margin-bottom: 0.8rem; text-align: left; }
.rules__table th, .rules__table td { padding: 0.7rem 0.4rem; border-bottom: 1px solid var(--rule); text-align: left; font-weight: 400; }
.rules__table thead th { font-family: var(--font-mono); font-size: var(--step--2); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.rules__table .num { text-align: right; white-space: nowrap; }
.rules__table .is-meshcore td { color: var(--ink); font-weight: 550; background: color-mix(in srgb, var(--signal) 9%, transparent); }
.rules__source { margin-top: 2rem; max-width: 62rem; }
.rules__source a { color: var(--ink); }