/* ============================================================
   dashboard.css — the study session dashboard
   ------------------------------------------------------------
   Hierarchy is the whole point here:
   1. Camera      — the hero, largest surface
   2. Focus score — the one number that matters, big ring
   3. Metrics     — colour-coded, scannable in one pass
   4. Room/Tutor  — one tabbed panel instead of stacked cards
   ============================================================ */

/* ---------- Layout rhythm ---------- */
.session-body {
  grid-template-columns: minmax(0, 1fr) 372px;
  gap: var(--s-5);
  padding: var(--s-5);
  align-content: start;
}
.session-main { gap: var(--s-4); align-content: start; }
.session-rail { gap: var(--s-4); align-content: start; }

/* ---------- Metric cards ---------- */
.metrics-row { gap: var(--s-3); }

.metric {
  --accent: var(--brand-400);
  position: relative;
  display: flex; align-items: flex-start; gap: 13px;
  padding: 16px 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--ring-inset);
  overflow: hidden;
  transition: border-color var(--dur-2), transform var(--dur-2) var(--ease-out);
}
.metric:hover { border-color: var(--line-strong); transform: translateY(-2px); }

.metric .m-ico {
  flex: none; width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
}
.metric .m-ico svg { width: 17px; height: 17px; }

.metric .m-body { min-width: 0; flex: 1; }
.metric .m-label {
  font-size: 11px; font-weight: 600; letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 3px;
}
.metric .m-value {
  font-size: 1.45rem; font-weight: 700; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums; line-height: 1.15; margin: 0;
}
.metric .m-hint { font-size: 11px; color: var(--text-3); margin-top: 2px; }

/* Thin proportion bar pinned to the card's bottom edge */
.metric .m-track {
  position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: var(--surface-3);
}
.metric .m-track > i {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 55%, transparent), var(--accent));
  transition: width var(--dur-4) var(--ease-out);
}

/* ---------- Focus hero ---------- */
.focus-hero {
  display: flex; align-items: center; gap: 20px;
  padding: 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(109,92,255,0.14), transparent 60%),
    var(--surface);
  box-shadow: var(--ring-inset);
}

.focus-ring-xl {
  --p: 0;
  --ring: var(--brand-500);
  flex: none; width: 116px; height: 116px; border-radius: 50%;
  display: grid; place-items: center;
  background: conic-gradient(var(--ring) calc(var(--p) * 1%), var(--surface-3) 0);
  transition: background var(--dur-3) var(--ease-out);
  position: relative;
}
.focus-ring-xl::before {
  content: ""; position: absolute; inset: -6px; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--ring) 28%, transparent), transparent 70%);
  opacity: 0.5; pointer-events: none;
}
.focus-ring-xl[data-grade="high"] { --ring: var(--accent-green); }
.focus-ring-xl[data-grade="mid"]  { --ring: var(--brand-400); }
.focus-ring-xl[data-grade="low"]  { --ring: var(--accent-amber); }

.focus-ring-xl .fr-inner {
  position: relative;
  width: 92px; height: 92px; border-radius: 50%;
  background: var(--surface);
  display: grid; place-content: center; text-align: center;
  box-shadow: inset 0 0 0 1px var(--line);
}
.focus-ring-xl b {
  display: block; font-size: 1.6rem; font-weight: 800; letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums; line-height: 1;
}
.focus-ring-xl small {
  display: block; font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); margin-top: 3px;
}

.focus-hero-meta { flex: 1; min-width: 0; display: grid; gap: 14px; }

.focus-state {
  display: inline-flex; align-items: center; gap: 8px; align-self: flex-start;
  padding: 6px 12px; border-radius: var(--r-full);
  font-size: var(--fs-xs); font-weight: 600;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--text-2);
  transition: color var(--dur-2), border-color var(--dur-2), background var(--dur-2);
}
.focus-state .dot { background: var(--text-3); box-shadow: none; }
.focus-state[data-state="focused"] {
  color: var(--accent-green); border-color: rgba(61,220,132,0.3); background: rgba(61,220,132,0.1);
}
.focus-state[data-state="focused"] .dot { background: var(--accent-green); }
.focus-state[data-state="distracted"] {
  color: var(--accent-amber); border-color: rgba(255,181,71,0.3); background: rgba(255,181,71,0.1);
}
.focus-state[data-state="distracted"] .dot { background: var(--accent-amber); }
.focus-state[data-state="away"] {
  color: var(--accent-rose); border-color: rgba(255,107,139,0.3); background: rgba(255,107,139,0.1);
}
.focus-state[data-state="away"] .dot { background: var(--accent-rose); }

.goal-block { display: grid; gap: 7px; }
.goal-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  font-size: var(--fs-xs); color: var(--text-3);
}
.goal-head .mono { color: var(--text-2); font-weight: 600; }
.goal-hint { font-size: 11px; color: var(--text-3); margin: 0; }

/* ---------- Tabbed rail panel ---------- */
.rail-panel {
  display: flex; flex-direction: column; min-height: 0;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface); box-shadow: var(--ring-inset); overflow: hidden;
}

.rail-tabs {
  display: flex; gap: 4px; padding: 8px;
  border-bottom: 1px solid var(--line); background: var(--surface-2);
}
.rail-tabs button {
  flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 12px; border-radius: 10px; cursor: pointer;
  background: none; border: none; color: var(--text-3);
  font-size: var(--fs-sm); font-weight: 600;
  transition: background var(--dur-1), color var(--dur-1), box-shadow var(--dur-1);
}
.rail-tabs button svg { width: 16px; height: 16px; }
.rail-tabs button:hover { color: var(--text-2); }
.rail-tabs button[aria-selected="true"] {
  background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm), var(--ring-inset);
}
.tab-count {
  min-width: 20px; padding: 1px 6px; border-radius: var(--r-full);
  background: var(--surface-3); color: var(--text-2);
  font-size: 10px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.rail-tabs button[aria-selected="true"] .tab-count {
  background: rgba(109,92,255,0.18); color: var(--brand-300);
}

.rail-pane { display: flex; flex-direction: column; min-height: 0; }
.rail-pane#paneRoom { padding: 14px; gap: 12px; }
.pane-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

.rail-pane .participants { max-height: 340px; }
.rail-pane#paneTutor { height: 460px; }
.rail-pane#paneTutor .tutor { height: 100%; }

/* Roster rows get a little more presence */
.participant { padding: 9px 10px; border-radius: 12px; }
.participant:hover { background: var(--surface-2); }

/* ---------- Camera stage polish ---------- */
.cam-stage {
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-md), var(--ring-inset);
}

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  .session-body { grid-template-columns: 1fr; }
  .session-rail { grid-template-columns: 1fr 1fr; display: grid; align-items: start; }
  .rail-panel { grid-column: 1 / -1; }
  .focus-hero { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  .metrics-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .session-body { padding: var(--s-4); gap: var(--s-4); }
  .session-rail { grid-template-columns: 1fr; }
  .focus-hero { flex-direction: column; align-items: stretch; text-align: center; gap: 16px; }
  .focus-ring-xl { margin-inline: auto; }
  .focus-state { align-self: center; }
  .metric { padding: 14px; }
  .metric .m-value { font-size: 1.3rem; }
  .rail-pane#paneTutor { height: 420px; }
}

/* ============================================================
   ROOM PICKER — the "which library do I walk into" screen
   ============================================================ */

/* ---------- Header stats ---------- */
.mini-stats { display: flex; gap: 10px; flex-wrap: wrap; }
.mini-stat {
  --accent: var(--brand-400);
  display: flex; align-items: center; gap: 11px;
  padding: 11px 16px 11px 12px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-md); box-shadow: var(--ring-inset);
  transition: border-color var(--dur-2), transform var(--dur-2) var(--ease-out);
}
.mini-stat:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.mini-stat .ms-ico {
  flex: none; width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
}
.mini-stat .ms-ico svg { width: 16px; height: 16px; }
.mini-stat .ms-body b {
  display: block; font-size: 1.15rem; font-weight: 700; letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums; line-height: 1.1;
}
.mini-stat .ms-body small { display: block; font-size: 11px; color: var(--text-3); margin-top: 1px; }

/* ---------- Room cards ---------- */
.rooms-grid { grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: var(--s-4); }

.room-card {
  --hue: 250;
  display: flex; flex-direction: column; text-align: left; cursor: pointer;
  padding: 0; overflow: hidden; position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--ring-inset);
  transition: transform var(--dur-2) var(--ease-out), border-color var(--dur-2), box-shadow var(--dur-2);
}
.room-card:hover {
  transform: translateY(-4px);
  border-color: hsl(var(--hue) 70% 60% / 0.4);
  box-shadow: var(--ring-inset), 0 20px 48px -18px hsl(var(--hue) 80% 40% / 0.5), var(--shadow-lg);
}

/* Compact, vivid cover — no more big empty gradient slab */
.rc-cover {
  position: relative; display: block; height: 78px; flex: none;
  background:
    radial-gradient(90% 140% at 85% -10%, hsl(var(--hue) 85% 60% / 0.75), transparent 62%),
    linear-gradient(135deg, hsl(var(--hue) 55% 30%), hsl(var(--hue) 60% 16%));
}
.rc-cover::after {           /* subtle grid texture so it isn't a flat wash */
  content: ""; position: absolute; inset: 0; opacity: 0.5;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, #000, transparent);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent);
}

/* Emoji tile straddles the cover edge — the premium pattern */
.rc-emoji {
  position: absolute; left: 20px; bottom: -22px; z-index: 2;
  width: 56px; height: 56px; border-radius: 16px;
  display: grid; place-items: center; font-size: 27px; line-height: 1;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-md);
  transition: transform var(--dur-2) var(--ease-spring);
}
.room-card:hover .rc-emoji { transform: translateY(-3px) scale(1.06) rotate(-4deg); }

.rc-badge {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  padding: 4px 10px; border-radius: var(--r-full);
  font-size: 10px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  background: rgba(8,8,12,0.55); color: #fff;
  border: 1px solid rgba(255,255,255,0.24);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}

/* Body grows so every card ends up the same height */
.rc-body {
  display: flex; flex-direction: column; flex: 1;
  padding: 32px 20px 18px;
}
.rc-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.rc-title h3 { font-size: 1.1rem; margin: 0; letter-spacing: -0.02em; }
.rc-count {
  display: inline-flex; align-items: center; gap: 6px; flex: none;
  font-size: var(--fs-xs); color: var(--text-2);
}
.rc-count b { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--text); }

.rc-tagline {
  color: var(--text-3); font-size: var(--fs-sm); margin: 7px 0 0; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  /* Always reserve two lines so every card is the same height, whether the
     tagline wraps or not. */
  min-height: 3em;
}

/* Live topics — what people are actually studying in there */
.rc-topics { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.rc-topic {
  padding: 4px 10px; border-radius: var(--r-full);
  font-size: 11px; font-weight: 500; color: var(--text-2);
  background: var(--surface-2); border: 1px solid var(--line);
  white-space: nowrap; max-width: 100%; overflow: hidden; text-overflow: ellipsis;
}

.rc-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-top: auto; padding-top: 18px;
}
.rc-foot .avatar-row { display: flex; }
.rc-foot .avatar-row .avatar {
  width: 28px; height: 28px; font-size: 10px; margin-left: -9px; border: 2px solid var(--surface);
}
.rc-foot .avatar-row .avatar:first-child { margin-left: 0; }
.rc-more {
  background: var(--surface-3) !important; color: var(--text-2);
  font-size: 10px !important; font-weight: 600;
}

/* Enter affordance — clearly a door, not a static tile */
.rc-enter {
  display: inline-flex; align-items: center; gap: 6px; flex: none;
  font-size: var(--fs-xs); font-weight: 600; color: var(--text-3);
  transition: color var(--dur-2), transform var(--dur-2) var(--ease-out);
}
.rc-enter svg { width: 15px; height: 15px; transition: transform var(--dur-2) var(--ease-out); }
.room-card:hover .rc-enter { color: hsl(var(--hue) 80% 72%); }
.room-card:hover .rc-enter svg { transform: translateX(4px); }

@media (max-width: 640px) {
  .rooms-grid { grid-template-columns: 1fr; }
  .mini-stats { width: 100%; }
  .mini-stat { flex: 1; }
  .rc-body { padding: 30px 16px 16px; }
}