/* Calendar page layer: sticky season panel, round strip, filters and card motion.
   Base card, panel and header styles stay in styles.css; this file only adds the
   interactive surface driven by scripts/calendarExperience.js. */

/* ---- Header and filters ---- */

.calendar-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
}

.calendar-header-copy { min-width: 0; }

.calendar-filter {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 3px);
  background: var(--surface);
}

.calendar-filter[hidden] { display: none; }

.calendar-filter button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  min-height: 44px;
  padding: .45rem .95rem;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition: background-color 200ms var(--ease-out), color 200ms var(--ease-out);
}

.calendar-filter button span {
  min-width: 1.4em;
  font-variant-numeric: tabular-nums;
  opacity: .72;
}

.calendar-filter button:hover { background: rgba(26, 26, 26, .06); color: var(--ink); }
.calendar-filter button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.calendar-filter button:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }

/* ---- Sticky season panel ---- */

/* The sentinel is the panel's top margin; once it leaves the space under the
   header the panel is stuck. */
.calendar-panel-sentinel { height: 14px; }

.calendar-progress-panel {
  position: sticky;
  top: var(--calendar-header-height, 0px);
  z-index: 40;
  margin-top: 0;
  margin-bottom: 18px;
  padding: 12px 16px 10px;
  transition: background-color 240ms var(--ease-out), border-color 240ms var(--ease-out), box-shadow 240ms var(--ease-out);
}

.calendar-progress-panel.is-stuck {
  border-color: transparent;
  background: rgba(252, 252, 252, .94);
  box-shadow: 0 1px 0 var(--line);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
  backdrop-filter: saturate(1.2) blur(8px);
}

/* A short paper fade so cards pass under the panel instead of butting against it. */
.calendar-progress-panel::after {
  content: "";
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  height: 16px;
  background: linear-gradient(var(--paper), rgba(252, 252, 252, 0));
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease-out);
}

.calendar-progress-panel.is-stuck::after { opacity: 1; }

.calendar-progress-heading {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: .25rem 1.25rem;
  margin-bottom: 4px;
}

.calendar-progress-heading h2 { font-size: 1.125rem; }

.calendar-progress-status {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: var(--text-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 180ms var(--ease-out);
}

.calendar-progress-status.is-preview { color: var(--ink); }

/* The strip replaces the thin bar visually; the bar keeps its progressbar role. */
.calendar-progress-panel.has-strip .calendar-progress-track {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

.calendar-round-strip {
  display: grid;
  grid-template-columns: repeat(var(--calendar-rounds, 23), minmax(0, 1fr));
  gap: 3px;
}

.calendar-round-strip[hidden] { display: none; }

.calendar-strip-tick {
  display: grid;
  gap: 4px;
  padding: 8px 0 2px;
  color: var(--muted);
  text-decoration: none;
}

.calendar-strip-bar {
  display: block;
  height: 6px;
  border-radius: 1px;
  background: var(--line);
  transform-origin: 50% 100%;
  transition: transform 220ms var(--ease-out), background-color 220ms var(--ease-out), opacity 220ms var(--ease-out);
}

.calendar-strip-label {
  font-size: .6875rem;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  font-variant-numeric: tabular-nums;
  transition: color 220ms var(--ease-out);
}

.calendar-strip-tick.is-past .calendar-strip-bar { background: var(--orange); }
.calendar-strip-tick.is-next .calendar-strip-bar { background: var(--ink); animation: calendar-next-pulse 2400ms ease-in-out infinite; }
.calendar-strip-tick.is-next .calendar-strip-label { color: var(--ink); }
.calendar-strip-tick.is-in-view .calendar-strip-bar { transform: scaleY(1.8); }
.calendar-strip-tick.is-in-view .calendar-strip-label { color: var(--ink); }
.calendar-strip-tick:hover .calendar-strip-bar,
.calendar-strip-tick:focus-visible .calendar-strip-bar { transform: scaleY(2.4); }
.calendar-strip-tick:hover .calendar-strip-label,
.calendar-strip-tick:focus-visible .calendar-strip-label { color: var(--orange-dark); }
.calendar-strip-tick.is-filtered-out .calendar-strip-bar { opacity: .3; }
.calendar-strip-tick:focus-visible { outline: 2px solid var(--orange); outline-offset: 2px; border-radius: 2px; }

@keyframes calendar-next-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .45; }
}

/* ---- Cards ---- */

/* Cards animate in with a transform; Chrome's scroll anchoring would follow
   that motion and drift the page, so cards never serve as anchors. */
.calendar-race-card {
  overflow-anchor: none;
  scroll-margin-top: var(--calendar-sticky-offset, 190px);
  transition: border-color 220ms var(--ease-out), transform 260ms var(--ease-out), background-color 220ms var(--ease-out);
}

.calendar-race-card.is-next { scroll-margin-top: var(--calendar-sticky-offset, 190px); }

.calendar-race-list.is-reveal-ready .calendar-race-card:not(.is-revealed) { opacity: 0; }

/* Pointer spotlight and a finish bar that draws along the bottom edge. */
.calendar-race-card::before,
.calendar-race-card::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.calendar-race-card::before {
  z-index: 0;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(260px circle at var(--calendar-spot-x, 50%) var(--calendar-spot-y, 50%), rgba(255, 107, 0, .13), transparent 70%);
  opacity: 0;
  transition: opacity 260ms var(--ease-out);
}

.calendar-race-card::after {
  z-index: 1;
  right: -1px;
  bottom: -1px;
  left: -1px;
  height: 3px;
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 320ms var(--ease-out);
}

.calendar-race-card > :not(.calendar-race-link) { position: relative; z-index: 1; }

.calendar-race-card:focus-within::after { transform: scaleX(1); }

.calendar-race-card.is-next::before { background: radial-gradient(260px circle at var(--calendar-spot-x, 50%) var(--calendar-spot-y, 50%), rgba(255, 255, 255, .24), transparent 70%); }
.calendar-race-card.is-next::after { background: var(--ink); }

/* On hover the Round label slides left to make room for an arrow, without
   changing the card's layout. */
.calendar-round > * { transition: transform 260ms var(--ease-out); }

.calendar-round::after {
  content: "→";
  position: absolute;
  right: 0;
  bottom: 0;
  color: var(--orange-dark);
  font-weight: 700;
  line-height: 1.1;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 200ms var(--ease-out), transform 260ms var(--ease-out);
}

.calendar-race-card.is-next .calendar-round::after { color: var(--ink); }
.calendar-race-card:focus-within .calendar-round > * { transform: translateX(-1.25rem); }
.calendar-race-card:focus-within .calendar-round::after { opacity: 1; transform: none; }

/* Pointer hover only where hovering exists, so a tapped card on a phone does not stay lit. */
@media (hover: hover) {
  .calendar-race-card:hover::before { opacity: 1; }
  .calendar-race-card:hover::after { transform: scaleX(1); }
  .calendar-race-card:hover .calendar-round > * { transform: translateX(-1.25rem); }
  .calendar-race-card:hover .calendar-round::after { opacity: 1; transform: none; }
}

.calendar-race-countdown {
  display: inline-block;
  margin: 10px 0 0;
  padding: 4px 8px;
  border-radius: 3px;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--text-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.calendar-race-countdown[hidden] { display: none; }

@media (hover: none) {
  .calendar-race-card::before { display: none; }
  .calendar-race-card:hover { border-color: var(--line); transform: none; }
  .calendar-race-card.is-next:hover { border-color: var(--orange); }
}

@media (max-width: 620px) {
  .calendar-filter { width: 100%; }
  .calendar-filter button { flex: 1 1 0; padding-inline: .5rem; }
  .calendar-progress-panel { padding: 9px 11px 8px; }
  .calendar-progress-heading { grid-template-columns: minmax(0, 1fr) auto; }
  .calendar-progress-heading h2 { font-size: 1rem; }
  .calendar-progress-status { display: none; }
  .calendar-round-strip { gap: 2px; }
  .calendar-strip-tick { padding-top: 5px; }
  .calendar-strip-bar { height: 5px; }
}

@media (max-width: 1023px) {
  .calendar-strip-label { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .calendar-strip-tick.is-next .calendar-strip-bar { animation: none; }
  .calendar-race-card,
  .calendar-race-card::before,
  .calendar-race-card::after,
  .calendar-round::after,
  .calendar-strip-bar,
  .calendar-progress-panel { transition: none; }
  .calendar-race-card:hover { transform: none; }
}

@media print {
  .calendar-progress-panel { position: static; }
  .calendar-race-list.is-reveal-ready .calendar-race-card:not(.is-revealed) { opacity: 1; }
}