/* ---- CASCADE LAYER ------------------------------------------------------
 *
 * Everything the kit ships sits in ONE layer named `overscan`, so a consumer's
 * own CSS beats it without a specificity fight and without !important. That is
 * close to mandatory for a distributed kit: an app should be able to restyle a
 * panel by writing a plain rule.
 *
 * ⚠️ ONE layer, deliberately, NOT a sub-layer per file. Sub-layers look tidier
 * and would silently reorder the kit against itself: layer order beats
 * specificity, so a high-specificity rule in an early file that currently wins
 * would start losing to a low-specificity rule in a later one. A single layer
 * preserves source order exactly, so nothing inside the kit changes.
 *
 * Unlayered author CSS wins over all of it. That is the point.
 */

@layer overscan {
/* PPI. SVG in the DOM so the theme reaches every mark. */

ov-radar {
  position: relative;
  display: block;
  aspect-ratio: 1;
  inline-size: var(--ov-radar-size, 180px);
}

.ov-radar__svg { inline-size: 100%; block-size: 100%; display: block; }

.ov-radar__ring,
.ov-radar__spoke {
  fill: none;
  stroke: var(--ov-line-strong);
  stroke-width: 0.4;
}

.ov-radar__ringlabel {
  fill: var(--ov-faint);
  font-family: var(--ov-font-mono);
  font-size: 3.4px;
}

.ov-radar__sweep {
  stroke: var(--ov-accent);
  stroke-width: 0.8;
}

.ov-radar__blip { fill: var(--ov-accent); }

/* Elevation stalks: a line from the contact up (or down) to its height, a
 * dot at the tip. Level (elevation 0) is a flat tick, a different mark. */
.ov-radar__stalk {
  stroke: var(--ov-accent);
  stroke-width: 0.5;
}
.ov-radar__stalk--level { stroke-width: 0.8; }
.ov-radar__stalktip { fill: var(--ov-accent); }

/* The mode note: what this scope is NOT showing, in words, on its own line
 * under the scope. Only a radar WITH a mode note stops being a fixed square:
 * the scope keeps its aspect ratio and the element grows by the note, so no
 * existing radar (which never has a note) changes size. */
/* The trail: phosphor persistence under the scope. A conic ramp from the
 * faintest (swept a full period ago, just AHEAD of the arm) to the brightest
 * (just BEHIND it), linear like the blips' decay. Clipped to the scope's
 * circle (r 48 of 100) and square to the scope, not to the element, so a
 * mode note under the scope does not stretch it. */
.ov-radar__trail {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  inline-size: 100%;
  aspect-ratio: 1;
  clip-path: circle(48% at 50% 50%);
  background: conic-gradient(from var(--ov-radar-angle, 0deg),
    color-mix(in srgb, var(--ov-accent) 2%, transparent) 0deg,
    color-mix(in srgb, var(--ov-accent) var(--ov-radar-trail, 24%), transparent) 360deg);
  pointer-events: none;
}
.ov-radar__svg { position: relative; }
/* Reduced motion: the scope plots everything at once and nothing sweeps, so
 * there is no sweep age to show. */
@media (prefers-reduced-motion: reduce) { .ov-radar__trail { display: none; } }

ov-radar[data-ov-note] { aspect-ratio: auto; }
ov-radar[data-ov-note] .ov-radar__svg { aspect-ratio: 1; block-size: auto; }
.ov-radar__note {
  padding-block-start: 6px;
  font-size: var(--ov-size-1);
  letter-spacing: 1px;
  line-height: 1.5;
  text-transform: uppercase;
  color: var(--ov-faint);
}

ov-radar[data-ov-dropped]::after {
  content: attr(data-ov-dropped-n);
  position: absolute;
  inset-block-end: 0;
  inset-inline-start: 0;
  font-size: var(--ov-size-1);
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ov-alarm);
}
}