/* ==========================================================================
   Rankings explorer — dashboard / data-table design
   A deliberately different layout from a simple card list: dark filter
   sidebar + dense sortable table + expandable pillar breakdown per row,
   plus a podium spotlight for the global top 3. Built on the core
   Coursera-blue tokens defined in styles.css.
   ========================================================================== */

.rankings-shell{
  display: grid;
  grid-template-columns: 272px 1fr;
  gap: 32px;
  align-items: start;
}
.rankings-main-col{ min-width: 0; }
.filters-backdrop{ display: none; }

/* ---------- sidebar ---------- */
.rankings-filters{
  position: sticky;
  top: 96px;
  background: var(--deep-2);
  color: #fff;
  border-radius: 16px;
  padding: 26px 22px 22px;
}
.rankings-filters h3{
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.rankings-filters .clear-link{
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--brass-light);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
}
.filter-group{
  padding: 16px 0;
  border-top: 1px solid rgba(255,255,255,0.14);
}
.filter-group:first-of-type{ border-top: none; padding-top: 0; }
.filter-group-label{
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
}
.filter-option{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 0;
  font-size: 13.5px;
  cursor: pointer;
  color: rgba(255,255,255,0.9);
}
.filter-option input{ accent-color: var(--brass-light); width: 15px; height: 15px; flex: none; }
.filter-option span.opt-label{ flex: 1; display: flex; align-items: center; gap: 8px; }
.filter-option span.opt-count{ font-size: 11.5px; color: rgba(255,255,255,0.45); }

.rank-quickset{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.rank-quickset button{
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.25);
  background: transparent;
  color: rgba(255,255,255,0.85);
  font-size: 12.5px;
  cursor: pointer;
}
.rank-quickset button.active{
  background: var(--brass-light);
  border-color: var(--brass-light);
  color: var(--deep-2);
  font-weight: 700;
}

/* ---------- podium spotlight ---------- */
.podium{
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 30px;
}
.podium-card{
  border-radius: 14px;
  padding: 20px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.podium-card::before{
  content: attr(data-medal);
  position: absolute;
  top: -6px; right: 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 56px;
  color: var(--line-soft);
  line-height: 1;
}
.podium-card.gold{ order: 2; border-color: #E6C25B; background: linear-gradient(180deg, #FFF9EA, #fff); }
.podium-card.silver{ order: 1; margin-top: 18px; }
.podium-card.bronze{ order: 3; margin-top: 18px; }
.podium-rank{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 10px;
}
.podium-logo{
  width: 44px; height: 44px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 11px;
  margin-bottom: 12px;
  position: relative;
  overflow: hidden;
}
.podium-logo img{
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  background: #fff;
  padding: 6px;
}
.podium-name{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--ink);
  margin: 0 0 4px;
  line-height: 1.25;
}
.podium-loc{ font-size: 12.5px; color: var(--ink-soft); margin-bottom: 10px; }
.podium-score{ font-family: var(--font-display); font-weight: 800; font-size: 22px; color: var(--deep); }
.podium-score span{ font-family: var(--font-body); font-weight: 500; font-size: 11.5px; color: var(--ink-soft); margin-left: 4px; }

/* ---------- toolbar ---------- */
.rankings-toolbar{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.rankings-search{ position: relative; flex: 1; min-width: 220px; max-width: 340px; }
.rankings-search input{
  width: 100%;
  padding: 10px 14px 10px 36px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ink);
  background: var(--paper-dim);
}
.rankings-search input:focus{ outline: none; border-color: var(--brass); background: var(--paper); }
.rankings-search svg{ position: absolute; left: 12px; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; stroke: var(--ink-soft); }

.toolbar-right{ display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.rankings-select{
  padding: 9px 30px 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  background: var(--paper) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="none" stroke="%2358585B" stroke-width="1.8"><path d="M6 8l4 4 4-4"/></svg>') no-repeat right 10px center;
  background-size: 14px;
  appearance: none;
  cursor: pointer;
}
.rankings-count{ font-size: 13px; color: var(--ink-soft); white-space: nowrap; }
.rankings-count strong{ color: var(--ink); }

.mobile-filter-toggle{
  display: none;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

/* ---------- table ---------- */
.rankings-table-wrap{
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.rankings-table-head{
  display: grid;
  grid-template-columns: 72px 1fr 130px 130px 40px;
  gap: 10px;
  padding: 12px 20px;
  background: var(--paper-dim);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.th-sort{
  background: none; border: none; padding: 0;
  font: inherit; color: inherit; cursor: pointer;
  display: flex; align-items: center; gap: 4px;
}
.th-sort svg{ width: 11px; height: 11px; opacity: 0.5; }
.th-sort.active{ color: var(--ink); }
.th-sort.active svg{ opacity: 1; }

.rank-row{ border-bottom: 1px solid var(--line); background: var(--paper); }
.rank-row:last-child{ border-bottom: none; }
.rank-row-main{
  display: grid;
  grid-template-columns: 72px 1fr 130px 130px 40px;
  gap: 10px;
  align-items: center;
  padding: 14px 20px;
  cursor: pointer;
}
.rank-row-main:hover{ background: var(--paper-dim); }

.cell-rank{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--ink);
}
.cell-rank .prev{
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 10.5px;
  color: var(--ink-soft);
  margin-top: 1px;
}
.cell-uni{ display: flex; align-items: center; gap: 12px; min-width: 0; }
.uni-logo{ position: relative; overflow: hidden; }
.uni-logo img{
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  background: #fff;
  padding: 5px;
}
.cell-uni .uni-logo{
  flex: none; width: 38px; height: 38px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: var(--font-display); font-weight: 800; font-size: 10px;
}
.cell-uni .uni-text{ min-width: 0; }
.cell-uni .uni-text .n{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cell-uni .uni-text .l{ font-size: 12.5px; color: var(--ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.cell-region{ font-size: 13px; color: var(--ink-soft); }
.cell-region .badge{
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink);
}
.cell-score{ display: flex; align-items: center; gap: 8px; }
.score-ring{
  width: 34px; height: 34px;
  border-radius: 50%;
  flex: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; color: var(--ink);
  background: conic-gradient(var(--brass) calc(var(--pct,0)*1%), var(--line-soft) 0);
}
.score-ring::after{
  content: attr(data-v);
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-size: 9.5px;
}
.score-dash{ font-size: 13px; color: var(--ink-soft); }

.cell-expand{
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--paper);
  display: flex; align-items: center; justify-content: center;
  transition: transform .2s var(--ease);
}
.cell-expand svg{ width: 13px; height: 13px; stroke: var(--ink-soft); }
.rank-row.expanded .cell-expand{ transform: rotate(180deg); background: var(--ink); }
.rank-row.expanded .cell-expand svg{ stroke: #fff; }

.rank-row-detail{
  display: none;
  padding: 4px 20px 22px 20px;
  background: var(--paper-dim);
  border-top: 1px solid var(--line);
}
.rank-row.expanded .rank-row-detail{ display: block; }

.detail-meta{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 18px;
}
.detail-meta span{
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}

.pillar-tabs{
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin-bottom: 16px;
}
.pillar-tab{
  flex: none;
  padding: 8px 15px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  white-space: nowrap;
}
.pillar-tab.active{ background: var(--ink); border-color: var(--ink); color: #fff; }

.pillar-panel{ display: flex; flex-wrap: wrap; gap: 18px 36px; }
.metric{ min-width: 220px; flex: 1; }
.metric-label{ font-size: 13px; color: var(--ink-soft); margin-bottom: 6px; display: flex; justify-content: space-between; }
.metric-label .m-rank{ font-size: 11px; color: var(--ink-soft); opacity: 0.7; }
.metric-bar-row{ display: flex; align-items: center; gap: 10px; }
.metric-bar-track{ flex: 1; max-width: 240px; height: 7px; border-radius: 999px; background: var(--line-soft); overflow: hidden; }
.metric-bar-fill{ height: 100%; background: var(--deep); border-radius: 999px; }
.metric-value{ font-family: var(--font-display); font-weight: 700; font-size: 13.5px; color: var(--ink); min-width: 32px; }

.row-actions{ display: flex; gap: 16px; margin-top: 16px; }
.row-actions .action-btn{
  display: flex; align-items: center; gap: 6px;
  background: none; border: none; cursor: pointer;
  font-size: 13px; font-weight: 500; color: var(--ink-soft);
}
.row-actions .action-btn svg{ width: 16px; height: 16px; stroke: var(--ink-soft); }
.row-actions .action-btn.is-active{ color: var(--brass); }
.row-actions .action-btn.is-active svg{ stroke: var(--brass); fill: var(--brass); }

/* ---------- pagination ---------- */
.rankings-pagination{ display: flex; align-items: center; justify-content: center; gap: 8px; margin: 26px 0 60px; }
.page-btn{
  min-width: 34px; height: 34px; padding: 0 8px;
  border-radius: 8px; border: 1px solid var(--line); background: var(--paper);
  font-family: var(--font-body); font-size: 13px; font-weight: 600; color: var(--ink-soft); cursor: pointer;
}
.page-btn:hover{ border-color: var(--brass); color: var(--ink); }
.page-btn.active{ background: var(--deep); border-color: var(--deep); color: #fff; }
.page-btn:disabled{ opacity: 0.4; cursor: not-allowed; }

.no-results{ text-align: center; padding: 60px 20px; color: var(--ink-soft); }
.no-results strong{ display: block; color: var(--ink); font-size: 17px; margin-bottom: 6px; }

/* ---------- compare tray ---------- */
.compare-tray{
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  background: var(--deep-2); color: #fff;
  transform: translateY(100%);
  transition: transform .25s var(--ease);
  box-shadow: 0 -12px 30px rgba(0,0,0,0.2);
}
.compare-tray.visible{ transform: translateY(0); }
.compare-tray-inner{ display: flex; align-items: center; gap: 18px; padding: 14px 0; flex-wrap: wrap; }
.compare-slots{ display: flex; gap: 10px; flex: 1; flex-wrap: wrap; }
.compare-slot{ display: flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.12); border-radius: 999px; padding: 6px 8px 6px 12px; font-size: 13px; }
.compare-slot button{ background: rgba(255,255,255,0.2); border: none; color: #fff; width: 18px; height: 18px; border-radius: 50%; cursor: pointer; line-height: 1; font-size: 12px; }

/* ---------- responsive ---------- */
@media (max-width: 760px){
  .metric{ min-width: 100%; }
  .metric-bar-track{ max-width: none; }
  .row-actions{ flex-wrap: wrap; }
}

@media (max-width: 980px){
  .rankings-shell{ grid-template-columns: 1fr; }
  .rankings-filters{
    position: fixed; inset: 0 0 0 auto;
    width: min(320px, 84vw);
    height: 100vh;
    border-radius: 0;
    transform: translateX(100%);
    transition: transform .25s var(--ease);
    z-index: 80;
    overflow-y: auto;
  }
  .rankings-filters.open{ transform: translateX(0); }
  .filters-backdrop{
    display: none;
    position: fixed; inset: 0; background: rgba(15,32,64,0.4); z-index: 70;
  }
  .filters-backdrop.open{ display: block; }
  .mobile-filter-toggle{ display: flex; }
  .podium{ grid-template-columns: 1fr; }
  .podium-card.gold, .podium-card.silver, .podium-card.bronze{ order: initial; margin-top: 0; }
  .rankings-table-head{ display: none; }
  .rank-row-main{ grid-template-columns: 50px 1fr 34px; }
  .cell-region, .cell-score{ display: none; }
}