/* ============================================================
   Trajectories page — extends tokens/nav/buttons/figure system
   defined in index.css
   ============================================================ */

.subpage-bar {
  position: sticky;
  z-index: var(--z-nav);
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--nav-height);
  padding-inline: clamp(1rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}
.subpage-back {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 620;
  transition: color var(--dur) var(--ease-out);
}
.subpage-back svg { width: .9rem; height: .9rem; }
.subpage-back:hover { color: var(--ink); }
.subpage-tools { display: flex; align-items: center; gap: .5rem; }

.traj-header { position: relative; overflow: hidden; padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem); }
.traj-header .topography { opacity: .5; }
.traj-header-inner { position: relative; z-index: 1; }
.traj-header .section-header-body p { color: var(--muted); font-size: .95rem; line-height: 1.72; max-width: 62ch; }

.traj-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.6rem;
  margin-top: 1.6rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}
.traj-meta > div { display: flex; align-items: baseline; gap: .4rem; }
.traj-meta dt { color: var(--muted); font-family: var(--font-mono); font-size: .58rem; letter-spacing: .12em; text-transform: uppercase; }
.traj-meta dd { color: var(--ink); font-size: .78rem; font-weight: 640; }

/* ---------- Model filter ---------- */

.model-filter {
  margin-bottom: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
}
.model-filter > summary {
  display: flex;
  align-items: center;
  gap: .6rem;
  min-height: 56px;
  padding-inline: 1.1rem;
  cursor: pointer;
  list-style: none;
  font-size: .84rem;
  font-weight: 640;
}
.model-filter > summary::-webkit-details-marker { display: none; }
.model-filter > summary::before {
  content: '';
  width: 0;
  height: 0;
  border-left: 5px solid var(--muted);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform var(--dur) var(--ease-out);
  flex: none;
}
.model-filter[open] > summary::before { transform: rotate(90deg); }
.model-filter-count {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
}
.model-filter-hint { margin-left: auto; color: var(--muted); font-size: .72rem; font-weight: 500; }

.model-filter-inner { padding: 0 1.1rem 1.2rem; border-top: 1px solid var(--line); }

.model-filter-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; padding-top: 1rem; }
.model-filter-search {
  min-height: 38px;
  flex: 1 1 200px;
  padding-inline: .9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--bg);
  color: var(--ink);
  font-size: .78rem;
}
.model-filter-search::placeholder { color: var(--muted); }
.model-filter-actions { display: flex; gap: .4rem; }
.model-filter-action {
  min-height: 38px;
  padding-inline: .9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  font-size: .74rem;
  font-weight: 620;
  transition: border-color var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out);
}
.model-filter-action:hover { border-color: var(--ink); background: color-mix(in srgb, var(--ink) 5%, transparent); }

.model-filter-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.4rem;
  margin-top: 1.1rem;
}
.model-filter-group-head { display: flex; align-items: center; gap: .45rem; margin-bottom: .55rem; }
.model-filter-group-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--group-tone, var(--accent)); flex: none; }
.model-filter-group[data-group="proprietary"] { --group-tone: var(--accent); }
.model-filter-group[data-group="generalist"] { --group-tone: var(--tone-generalist); }
.model-filter-group[data-group="spatial"] { --group-tone: var(--tone-spatial); }
.model-filter-group[data-group="driving"] { --group-tone: var(--tone-driving); }
.model-filter-group-head span { color: var(--muted); font-family: var(--font-mono); font-size: .58rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.model-filter-list { display: grid; gap: .1rem; }
.model-check {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .34rem .3rem;
  border-radius: var(--r-xs);
  color: var(--ink-soft);
  font-size: .76rem;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}
.model-check:hover { background: color-mix(in srgb, var(--ink) 5%, transparent); color: var(--ink); }
.model-check input { width: 14px; height: 14px; accent-color: var(--group-tone, var(--accent)); flex: none; }
.model-check.is-filtered-out { display: none; }

/* ---------- Task tabs ---------- */

.task-tabs {
  position: sticky;
  top: var(--nav-height);
  z-index: 30;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  padding-block: .9rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.task-tab {
  display: inline-flex;
  align-items: baseline;
  gap: .45rem;
  min-height: 40px;
  padding: 0 .95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 640;
  transition: border-color var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}
.task-tab-code { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .06em; }
.task-tab:hover { border-color: var(--line-strong); color: var(--ink); }
.task-tab.is-active { border-color: transparent; background: var(--ink); color: var(--bg); }
.task-tab.is-active .task-tab-code { color: color-mix(in srgb, var(--bg) 70%, var(--accent)); }

/* ---------- Panel ---------- */

.task-panel { display: none; padding-block: clamp(2rem, 4vw, 3rem) clamp(4rem, 6vw, 5rem); }
.task-panel.is-active { display: block; }
.task-panel-intro { max-width: 70ch; color: var(--muted); font-size: .88rem; line-height: 1.7; margin-bottom: clamp(1.5rem, 3vw, 2.2rem); }
.task-panel-intro strong { color: var(--ink); }

.traj-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.3rem;
}

.traj-card {
  display: grid;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), transform var(--dur) var(--ease-spring);
}
.traj-card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); transform: translateY(-2px); }

.traj-card-media { position: relative; cursor: zoom-in; background: var(--surface-strong); }
.traj-card-media img { width: 100%; height: 190px; object-fit: cover; }
.traj-card-badge {
  position: absolute;
  top: .65rem;
  left: .65rem;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .28rem .6rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.traj-card-badge.is-correct { background: color-mix(in srgb, var(--positive) 85%, transparent); color: #fff; }
.traj-card-badge.is-wrong { background: color-mix(in srgb, var(--accent) 88%, transparent); color: #fff; }
.traj-card-badge.is-mixed { background: color-mix(in srgb, var(--ink) 70%, transparent); color: #fff; }
.traj-card-badge.is-empty { background: rgb(12 12 10 / 40%); color: rgb(255 255 255 / 75%); }
.traj-card-index {
  position: absolute;
  top: .65rem;
  right: .65rem;
  padding: .28rem .55rem;
  border-radius: 999px;
  background: rgb(12 12 10 / 46%);
  color: rgb(255 255 255 / 88%);
  font-family: var(--font-mono);
  font-size: .56rem;
  letter-spacing: .08em;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.traj-card-body { display: grid; min-width: 0; gap: .7rem; padding: 1rem 1.05rem 1.15rem; }
.traj-card-question { color: var(--ink); font-size: .82rem; font-weight: 570; line-height: 1.5; }

.traj-choices { display: grid; gap: .35rem; }
.traj-choice {
  display: flex;
  align-items: flex-start;
  gap: .5rem;
  padding: .38rem .55rem;
  border-radius: var(--r-xs);
  color: var(--muted);
  font-size: .74rem;
  line-height: 1.5;
}
.traj-choice svg { width: .85rem; height: .85rem; flex: none; margin-top: .18rem; }
.traj-choice.is-gt { background: color-mix(in srgb, var(--positive) 12%, transparent); color: var(--ink); }
.traj-choice.is-gt svg { color: var(--positive); }
.traj-choice.is-pred-wrong { background: color-mix(in srgb, var(--accent) 10%, transparent); color: var(--ink); }
.traj-choice.is-pred-wrong svg { color: var(--accent); }

.traj-gt {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .5rem .6rem;
  border-radius: var(--r-xs);
  background: color-mix(in srgb, var(--positive) 10%, transparent);
  font-size: .76rem;
}
.traj-gt-label { flex: none; color: var(--positive); font-family: var(--font-mono); font-size: .58rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.traj-gt-value { color: var(--ink); font-weight: 600; }

.traj-model-list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: .58rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding-top: .3rem;
  border-top: 1px solid var(--line);
}
.traj-model-list { display: grid; min-width: 0; gap: .3rem; }

.traj-model-row { min-width: 0; border-radius: var(--r-xs); }
.traj-model-row > summary {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: .5rem;
  padding: .4rem .5rem;
  border-radius: var(--r-xs);
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease-out);
}
.traj-model-row > summary::-webkit-details-marker { display: none; }
.traj-model-row:hover > summary { background: color-mix(in srgb, var(--ink) 5%, transparent); }
.traj-model-row.is-hidden { display: none; }

.traj-model-status {
  display: grid;
  width: 16px;
  height: 16px;
  flex: none;
  place-items: center;
  border-radius: 50%;
  color: #fff;
}
.traj-model-status svg { width: .6rem; height: .6rem; }
.traj-model-status.is-correct { background: var(--positive); }
.traj-model-status.is-wrong { background: var(--accent); }
.traj-model-status.is-empty { background: var(--line-strong); }

.traj-model-name { flex: 0 0 auto; max-width: 34%; min-width: 0; overflow: hidden; color: var(--ink); font-size: .73rem; font-weight: 640; text-overflow: ellipsis; white-space: nowrap; }
.traj-model-answer { flex: 1 1 auto; min-width: 0; overflow: hidden; color: var(--muted); font-size: .72rem; text-overflow: ellipsis; white-space: nowrap; }
.traj-model-row > summary::after {
  content: '';
  width: 0;
  height: 0;
  flex: none;
  border-left: 4px solid var(--muted);
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
  transition: transform var(--dur) var(--ease-out);
}
.traj-model-row[open] > summary::after { transform: rotate(90deg); }
.traj-model-row-reasoning {
  margin: 0 .5rem .5rem;
  padding: .55rem .65rem;
  border-radius: var(--r-xs);
  background: var(--bg-sunk);
  color: var(--ink-soft);
  font-size: .72rem;
  line-height: 1.62;
  white-space: pre-line;
}

@media (max-width: 900px) {
  .model-filter-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .traj-grid { grid-template-columns: 1fr; }
  .task-tabs { top: var(--nav-height); overflow-x: auto; flex-wrap: nowrap; }
  .model-filter-groups { grid-template-columns: 1fr; }
  .traj-model-name { max-width: 44%; }
}