/* =========================================================================
   social.css — /social only
   =========================================================================
   Extends style.css → hub.css → friends.css (friends.css is loaded first —
   it's a hard dependency of classes.html/tools.html/admin.html too, so it
   keeps its name and location; this file only adds what's new to /social).

   Three tabs, three textures — the tabbed restructure's whole point was to
   stop each section reading as an identical .etac-card box AND to stop the
   standing band's rank row sitting further inset than the identity row
   above it (docs/plans/design-credibility-audit.md; the tabs vision spec,
   .claude/vision/social-hub-tabs.md). Friends = banner-backed cards.
   Leaderboard = a bare ruled list under two thin control rows. Class = the
   one place stat blocks and bars belong, since a class is the only bounded
   object on the page.
   ========================================================================= */

/* ---------- Your standing ----------
   Three zones in a single row, each cut off from the next by a hairline
   divider — identity | rank progress | overall standing — so the band
   reads as three distinct groups at a glance instead of one dense block
   of equally-weighted numbers. The overall-rank figure is the one stat
   sized to be read from across the room; the tier label and RP line are
   deliberately quieter support text, not competing for the same glance.
   Unequipped = flat --bg-elevated, same neutral every other surface here
   uses; a gradient wash only appears once a cosmetic banner is actually
   equipped (F10 — no gradient as a default fill), mirroring profile.css's
   .p-banner layering contract: art, then scrim, then content, explicit
   z-index throughout. */
.so-standing {
  position: relative; overflow: hidden;
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  background: var(--bg-elevated);
  padding: var(--space-18) var(--space-20);
  margin: 0 0 var(--space-14);
  display: flex; align-items: center; gap: var(--space-18);
}
.so-standing.has-banner { background: linear-gradient(135deg, var(--c1), var(--c2, var(--c1))); }
.so-standing.has-banner::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(to top, rgba(0, 0, 0, .3), transparent 60%),
    linear-gradient(102deg, rgba(0, 0, 0, .5) 0%, rgba(0, 0, 0, .22) 50%, rgba(0, 0, 0, .06) 78%);
}
.so-standing > :not(.etac-banner-art) { position: relative; z-index: 2; }

.so-standing__zone--id {
  flex: none; display: flex; flex-direction: column; align-items: center; gap: var(--space-8);
  padding-right: var(--space-18); border-right: 1px solid var(--border);
}
.so-standing.has-banner .so-standing__zone--id { border-right-color: rgba(255, 255, 255, .2); }

.so-standing__ring {
  width: 64px; height: 64px; padding: var(--space-4); flex: none;
  background: conic-gradient(from -90deg, var(--accent) calc(var(--pct, 0) * 3.6deg), var(--border) 0);
}
.so-standing.has-banner .so-standing__ring {
  background: conic-gradient(from -90deg, #fff calc(var(--pct, 0) * 3.6deg), rgba(255, 255, 255, .32) 0);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, .18);
}

/* Reuses .etac-rank-hero__glow/__sparkles/__icon (hub.css) wholesale; only
   this slot's own geometry is bespoke. */
.so-standing__badge-slot {
  position: relative; width: 72px; height: 80px;
  display: flex; align-items: center; justify-content: center;
}

.so-standing__zone--mid {
  flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: var(--space-10);
  padding-right: var(--space-18); border-right: 1px solid var(--border);
}
.so-standing.has-banner .so-standing__zone--mid { border-right-color: rgba(255, 255, 255, .2); }

.so-standing__who { min-width: 0; }
.so-standing__name {
  margin: 0; font: 700 20px/1.2 var(--fdisplay); color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-wrap: balance;
}
.so-standing.has-banner .so-standing__name { color: #fff; text-shadow: 0 1px 3px rgba(0, 0, 0, .4); }
.so-standing__title { display: block; margin-top: var(--space-4); }
.so-standing__streak {
  display: block; margin-top: var(--space-5); font: 600 12.5px var(--fmono); color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.so-standing.has-banner .so-standing__streak { color: rgba(255, 255, 255, .85); text-shadow: 0 1px 2px rgba(0, 0, 0, .3); }

/* Support text, quieter than __who on purpose — the headline number lives
   in __standing, not here. */
.so-standing__rankmain { min-width: 0; }
.so-standing__ranklabel { font: 700 13px var(--fsans); color: var(--text-muted); margin-bottom: var(--space-6); }
.so-standing.has-banner .so-standing__ranklabel { color: rgba(255, 255, 255, .8); text-shadow: 0 1px 3px rgba(0, 0, 0, .4); }
.so-standing__meter { width: 100%; max-width: 220px; }
.so-standing__ranksub { font-variant-numeric: tabular-nums; color: var(--text-dim); }
.so-standing.has-banner .so-standing__ranksub,
.so-standing.has-banner .so-standing__ranksub b { color: rgba(255, 255, 255, .75); text-shadow: 0 1px 3px rgba(0, 0, 0, .4); }

/* The headline stat — the one number worth reading at a glance, sized and
   weighted to anchor the whole band. */
.so-standing__standing {
  flex: none; display: flex; flex-direction: column; align-items: flex-end; gap: var(--space-2);
  text-align: right;
}
.so-standing__standing-label {
  font: 700 10.5px var(--fsans); letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-dim);
}
.so-standing.has-banner .so-standing__standing-label { color: rgba(255, 255, 255, .7); }
.so-standing__standing-pos { font: 800 30px var(--fsans); color: var(--text); line-height: 1; font-variant-numeric: tabular-nums; }
.so-standing__standing-pct { font: 600 11px var(--fmono); color: var(--text-muted); font-variant-numeric: tabular-nums; }
.so-standing.has-banner .so-standing__standing-pos,
.so-standing.has-banner .so-standing__standing-pct { color: #fff; text-shadow: 0 1px 3px rgba(0, 0, 0, .4); }

@media (max-width: 640px) {
  .so-standing { flex-direction: column; gap: var(--space-12); }
  .so-standing__zone--id, .so-standing__zone--mid {
    border-right: none; padding-right: 0; width: 100%; align-items: center; text-align: center;
  }
  .so-standing__zone--mid {
    border-top: 1px dashed var(--border); padding-top: var(--space-12);
    align-items: center; text-align: center;
  }
  .so-standing.has-banner .so-standing__zone--mid { border-top-color: rgba(255, 255, 255, .25); }
  .so-standing__meter { margin: 0 auto; }
  .so-standing__standing {
    align-items: center; text-align: center; width: 100%;
    padding-top: var(--space-10); border-top: 1px dashed var(--border);
  }
  .so-standing.has-banner .so-standing__standing { border-top-color: rgba(255, 255, 255, .25); }
}

/* ---------- Tab strip ---------- */
.so-tabs { display: flex; gap: var(--space-6); margin: 0 0 var(--space-14); }
.so-tab {
  position: relative; flex: 1; padding: var(--space-9) var(--space-12); border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--bg-input); color: var(--text-muted);
  font: 700 13px var(--fsans); cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.so-tab:hover { border-color: var(--border-hover); }
.so-tab.is-active { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.so-tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.so-tab__badge {
  display: inline-flex; align-items: center; justify-content: center; min-width: 16px; height: 16px;
  margin-left: var(--space-6); padding: 0 4px; border-radius: var(--radius-pill);
  background: var(--warning-fg); color: var(--bg); font: 800 10px var(--fmono);
  vertical-align: middle;
}
.so-tab.is-active .so-tab__badge { background: var(--bg); color: var(--accent); }

.so-panel[hidden] { display: none; }
/* Entrance-only fade — re-triggers automatically every time an element
   goes from display:none to displayed, so no JS timing is needed for the
   "switching tabs" motion criterion. Asymmetric with the rest of the
   site's motion budget (enter 400-600ms elsewhere) on purpose: a tab swap
   is a much smaller beat than a rank-up or an unlock, so it stays short. */
@keyframes so-panel-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.so-panel:not([hidden]) { animation: so-panel-in .18s cubic-bezier(0.22, 1, 0.36, 1); }
@media (prefers-reduced-motion: reduce) {
  .so-panel:not([hidden]) { animation: none; }
}
.so-panel__head {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap;
  gap: var(--space-10); margin: 0 0 var(--space-10);
}
.so-panel__head h3 { margin: 0; font: 700 15px var(--fdisplay); color: var(--text); }
.so-panel__head--tight { margin-top: var(--space-18); }
.so-density {
  background: none; border: 1px solid var(--border); border-radius: var(--radius-pill);
  padding: var(--space-4) var(--space-10); font: 700 11px var(--fsans); color: var(--text-muted); cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}
.so-density:hover { border-color: var(--border-hover); color: var(--text); }
.so-density[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }

/* ---------- Friends tab: banner-backed cards ---------- */
/* .is-compact carries no rules of its own — renderFriendState (social.js)
   swaps the markup shape entirely (.fr-row vs .so-friendcard) rather than
   toggling visibility, so there's nothing for CSS to hide here. The class
   still gets set, for anyone styling off it later. */
.so-friend-cards { display: flex; flex-direction: column; gap: var(--space-8); }
.so-friendcard {
  position: relative; overflow: hidden; display: flex; align-items: center; gap: var(--space-12);
  padding: var(--space-10) var(--space-14); border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--bg-elevated);
}
.so-friendcard.has-banner { background: linear-gradient(135deg, var(--c1), var(--c2, var(--c1))); border-color: transparent; }
.so-friendcard.has-banner::before {
  content: ''; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(100deg, rgba(0, 0, 0, .5) 0%, rgba(0, 0, 0, .18) 60%);
}
.so-friendcard > :not(.etac-banner-art) { position: relative; z-index: 2; }
.so-friendcard .fr-row__avatar { flex: none; width: 36px; height: 36px; }
.so-friendcard__body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: var(--space-4); }
.so-friendcard__name { font: 700 14px var(--fsans); color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.so-friendcard.has-banner .so-friendcard__name { color: #fff; text-shadow: 0 1px 3px rgba(0, 0, 0, .4); }
.so-friendcard__stats {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-10);
  font: 600 12px var(--fmono); color: var(--text-dim); font-variant-numeric: tabular-nums;
}
.so-friendcard.has-banner .so-friendcard__stats { color: rgba(255, 255, 255, .85); text-shadow: 0 1px 2px rgba(0, 0, 0, .3); }
.so-friendcard__actions { display: flex; gap: var(--space-6); flex-shrink: 0; }

/* ---------- The board — a bare ruled list, not a card around a card ---------- */
/* Scope drops out from under the main .so-tabs strip: smaller, softer,
   and animated in on the same entrance beat as the panel itself, so it
   reads as a sub-nav belonging to the Leaderboard tab rather than a
   second full-weight tab bar competing with the real one. */
.so-board .fr-tabs.so-lb-scope {
  width: fit-content; margin: 0 auto var(--space-12); gap: var(--space-5);
  animation: so-panel-in .2s cubic-bezier(0.22, 1, 0.36, 1) .04s both;
}
@media (prefers-reduced-motion: reduce) {
  .so-board .fr-tabs.so-lb-scope { animation: none; }
}
.so-board .so-lb-scope .fr-tab {
  flex: none; padding: var(--space-5) var(--space-9); font-size: 11px;
}
.so-board .so-lb-scope .fr-tab.is-active {
  background: var(--accent-soft); border-color: var(--accent); color: var(--accent);
}

.so-board__head {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap;
  gap: var(--space-10); margin: 0 0 var(--space-10);
}
.so-board__head h3 { margin: 0; font: 700 15px var(--fdisplay); color: var(--text); }

/* Metric + window read as one dense control cluster instead of two
   separate bars. */
.so-lb-controls { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-6) var(--space-10); margin: 0 0 var(--space-12); }
.so-metric-tabs { display: flex; gap: var(--space-5); flex-wrap: wrap; }
.so-metric-tab {
  padding: var(--space-4) var(--space-9); border-radius: var(--radius-pill); border: 1px solid var(--border);
  background: var(--bg-input); color: var(--text-dim); font: 700 11.5px var(--fmono);
  cursor: pointer; transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.so-metric-tab:hover { border-color: var(--border-hover); }
.so-metric-tab.is-active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.so-lb-controls .fr-lb-window { margin: 0; padding-left: var(--space-10); border-left: 1px solid var(--border); }
.so-lb-controls .fr-lb-window[hidden] { display: none; }
.so-metric-tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- The week — friend streaks, one row per person ---------- */
.so-week { margin-top: var(--space-22); }
.so-week__grid { display: flex; flex-direction: column; gap: var(--space-2); }
.so-week__head, .so-week__row {
  display: grid; grid-template-columns: minmax(0, 1fr) repeat(7, 22px) auto;
  align-items: center; gap: var(--space-6);
}
.so-week__head { padding: 0 var(--space-9) var(--space-6); }
.so-week__dow {
  text-align: center; font: 700 10.5px var(--fmono); color: var(--text-dim);
}
.so-week__row {
  padding: var(--space-6) var(--space-9); border: 1px solid var(--border); border-radius: var(--radius-md);
  background: var(--bg-input);
}
.so-week__name {
  font: 700 12.5px var(--fsans); color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.so-week__row.you .so-week__name { color: var(--accent); }
.so-week__cell {
  width: 14px; height: 14px; margin: 0 auto; border-radius: 4px;
  background: var(--bg-elevated); border: 1px solid var(--border);
}
.so-week__cell.hit { background: var(--accent); border-color: var(--accent); }
.so-week__streak {
  display: inline-flex; align-items: center; gap: var(--space-4);
  font: 700 11.5px var(--fmono); color: var(--text-dim); white-space: nowrap;
}
.so-week__streak.is-live { color: var(--spark-2); }

/* ---------- Class tab ---------- */
.so-classprompt { text-align: center; padding: var(--space-18) var(--space-14); }
.so-classprompt .etac-empty__ico { width: 56px; height: 56px; margin: 0 auto var(--space-10); display: block; }
.so-classprompt .etac-inline-form { justify-content: center; }

.so-classhead { margin: 0 0 var(--space-14); }
.so-classhead__id { display: flex; align-items: center; gap: var(--space-10); flex-wrap: wrap; }
.so-classhead__name { font: 800 18px var(--fdisplay); color: var(--text); }
.so-classhead__code {
  font: 700 12px var(--fmono); color: var(--text-muted); background: var(--bg-input);
  border: 1px solid var(--border); border-radius: var(--radius-pill); padding: var(--space-4) var(--space-10);
  cursor: pointer; letter-spacing: 0.04em;
}
.so-classhead__code:hover { border-color: var(--border-hover); color: var(--text); }
.so-classhead__teacher { margin: var(--space-4) 0 0; font: 500 12.5px var(--fsans); color: var(--text-muted); }

.so-classstats { padding: var(--space-14) 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin: 0 0 var(--space-14); }

[data-class-joinform][hidden] { display: none; }
.so-classgoal, .so-classweekly { margin: 0 0 var(--space-14); }
.so-classgoal__row {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-8);
  margin-bottom: var(--space-6);
}
.so-classgoal__lab { font: 600 12px var(--fsans); color: var(--text-muted); }
.so-classgoal__n { font: 700 12.5px var(--fmono); color: var(--text); font-variant-numeric: tabular-nums; }

/* ---------- Class rewards ----------
   Own-progress-only card: a goal the viewer's teacher set, and how close
   THIS student is to it — no classmate rows (see listStudentRewards's
   privacy doctrine in db.js). Built from friends.css's fr-list so it sits
   inside the same "list of things" vocabulary as the rest of the tab. */
.so-classrewards { margin-bottom: var(--space-18); }
.so-reward-row {
  padding: var(--space-9) var(--space-10); border: 1px solid var(--border); border-radius: var(--radius-md);
  background: var(--bg-input);
}
.so-reward-row.is-claimed { border-color: var(--spark-bd); background: color-mix(in srgb, var(--spark-1) 10%, var(--bg-input)); }
.so-reward-row__head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-8); }
.so-reward-row__label { font: 700 12.5px var(--fsans); color: var(--text); }
.so-reward-row__claimed { font: 700 11.5px var(--fmono); color: var(--spark-ink); background: linear-gradient(135deg, var(--spark-1), var(--spark-2)); padding: 1px var(--space-7); border-radius: var(--radius-pill); }
.so-reward-row__sub { margin-top: 1px; font: 600 11.5px var(--fmono); color: var(--text-dim); }
.so-reward-row__meter { margin-top: var(--space-6); }
.so-reward-row__n { margin-top: var(--space-4); font: 600 11px var(--fmono); color: var(--text-dim); text-align: right; }

.so-classunits { margin-bottom: var(--space-18); }
.so-classunit__meter { position: relative; }
.so-classunit__you {
  position: absolute; top: -2px; bottom: -2px; width: 2px; background: var(--text);
  transform: translateX(-1px);
}

.so-classboard { margin-bottom: var(--space-14); }

/* ---------- Peer profile modal (social.js's showPeerProfile) ---------- */
.so-peer__stats {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-8) var(--space-12);
  padding: var(--space-10) 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.so-peer__stat { font: 700 12.5px var(--fmono); color: var(--text-muted); white-space: nowrap; }
.so-peer__units { margin-top: var(--space-4); }
.so-peer__units .etac-unit__side { justify-self: end; }

/* ---------- Teach a class — one line, no card, no icon slot ---------- */
.so-teach {
  margin: var(--space-14) 0 0; padding: 0; text-align: center;
  font: 500 12.5px/1.5 var(--fsans); color: var(--text-muted);
}
.so-teach a { color: var(--accent); font-weight: 700; }