/* ===========================
   LEAGUES OF CODE — LEADERBOARD
   Imports brand.css for shared design tokens
   =========================== */

@import '../brand.css';

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Semantic aliases for leaderboard */
  --bg:            var(--ui-surface-page);
  --surface:       var(--ui-surface-card);
  --surface2:      var(--ui-surface-subtle);
  --border:        var(--ui-border);
  --border-dark:   var(--ui-border-strong);
  --accent:        var(--loc-blue);
  --accent-shadow: var(--ui-accent-shadow);
  --accent-bg:     var(--ui-accent-bg);
  --text:          var(--ui-text-strong);
  --text-sub:      var(--ui-text-body);
  --text-muted:    var(--ui-text-muted);
  --gold:          #f5a623;
  --silver:        #8c9ab0;
  --bronze:        #b07540;
  --green:         #22c55e;
}

html { font-size: 15px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body, 'Inter', system-ui, sans-serif);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   HEADER
   =========================== */
header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; gap: 2rem;
  padding: 0 2rem;
  height: 62px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-heading, 'GT Walsheim', system-ui, sans-serif);
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.2px;
}

.header-left { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; margin-left: auto; }

.header-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--ui-radius-sm);
  transition: color 0.15s, background 0.15s;
}
.header-link:hover { color: var(--text); background: var(--surface2); }
.header-link--primary {
  font-weight: 600;
  color: var(--accent);
  padding: 6px 14px;
  border-radius: var(--ui-radius-md);
  border: 1.5px solid var(--accent);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.header-link--primary:hover { background: var(--accent); color: #fff; }
.header-link--logout { color: var(--text-muted); }
.header-link--logout:hover { color: #e53935; background: rgba(229,57,53,0.06); }

.user-pill {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 12px 5px 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--ui-radius-md);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text);
  background: var(--surface);
}

.avatar-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 2px rgba(34,197,94,0.2);
}

.login-btn {
  display: inline-flex;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  font-family: inherit;
  padding: 7px 18px;
  cursor: pointer;
  border: 1.5px solid var(--accent);
  border-radius: var(--ui-radius-md);
  background: transparent;
  text-decoration: none;
  line-height: 1;
  transition: background 0.15s, color 0.15s;
}
.login-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* ===========================
   PAGE LAYOUT
   =========================== */
main {
  position: relative; z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
}

.tab-section { animation: fadeIn 0.25s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.section-header {
  display: flex; align-items: baseline; gap: 1rem; margin-bottom: 2rem;
  flex-wrap: wrap;
}
.section-header h1 {
  font-family: var(--font-heading, 'Inter', system-ui, sans-serif);
  font-weight: 800;
  font-size: 2.2rem;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1;
}

.total-count {
  margin-left: auto;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* ===========================
   HEATMAP
   =========================== */
.heatmap-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--ui-radius-lg);
  padding: 1.6rem 2rem;
  margin-bottom: 1.8rem;
  overflow-x: auto;
  display: none;
  box-shadow: 0 4px 6px rgba(0,0,0,0.06);
}
.heatmap-container.visible { display: block; animation: fadeIn 0.3s ease; }

.heatmap-label {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 1rem;
}
.hm-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.hm-sub {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

:root { --cell: 16px; --cell-gap: 2px; --day-col: 36px; }

.heatmap-months {
  display: grid;
  gap: 0 var(--cell-gap);
  margin-bottom: 4px;
}
.hm-month-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  align-self: end;
  padding-bottom: 2px;
}

.heatmap-grid {
  display: grid;
  gap: var(--cell-gap);
  grid-auto-flow: column;
}

.hm-day-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex; align-items: center;
  line-height: 1;
  height: var(--cell);
}

.hm-cell {
  width: var(--cell);
  height: var(--cell);
  border-radius: 3px;
  cursor: pointer;
  transition: transform 0.1s;
  position: relative;
  user-select: none;
}
.hm-cell.no-tooltip { cursor: default; pointer-events: none; }
.hm-cell:hover { transform: scale(1.25); z-index: 10; }

.hm-cell[data-level="0"] { background: #e5e7eb; }
.hm-cell[data-level="1"] { background: #bfcbfa; }
.hm-cell[data-level="2"] { background: #8a9bf8; }
.hm-cell[data-level="3"] { background: #5b72f6; }
.hm-cell[data-level="4"] { background: var(--accent); box-shadow: 0 0 6px var(--accent-shadow); }

.heatmap-legend {
  display: inline-grid;
  grid-template-columns: 36px repeat(6, var(--cell)) 36px;
  grid-template-rows: var(--cell);
  gap: 0 var(--cell-gap);
  align-items: center;
  margin-top: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
}
.legend-cells { display: contents; }

.hm-tooltip {
  position: fixed;
  background: var(--loc-dark, #05071D);
  color: #fff;
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 5px 10px;
  border-radius: 7px;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.12s;
  transform: translate(-50%, -100%);
  margin-top: -8px;
}
.hm-tooltip.visible { opacity: 1; }

/* ===========================
   BOARD
   =========================== */
.board-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--ui-radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0,0,0,0.06);
}

.board-header-row,
.board-row {
  display: grid;
  grid-template-columns: 52px 1fr 160px 1.5fr 110px;
  align-items: center;
  padding: 0 1.4rem;
  gap: 1rem;
}

.board-header-row {
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  padding-top: 11px; padding-bottom: 11px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.board-row {
  padding-top: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
  animation: rowIn 0.3s ease both;
}
.board-row:last-child { border-bottom: none; }
.board-row:hover { background: var(--surface2); }

@keyframes rowIn {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: none; }
}

.board-header-row span { text-align: left; }
.board-header-row .col-rank { text-align: center; }

/* Rank */
.col-rank { text-align: center; font-size: 0.8rem; font-weight: 700; color: var(--text-muted); }

.rank-num {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 700; color: var(--text-muted);
  min-width: 24px;
}

/* Medal rows */
.board-row.row-gold   { background: #fffbea; border-left: 3px solid var(--gold); }
.board-row.row-silver { background: #f5f6fa; border-left: 3px solid var(--silver); }
.board-row.row-bronze { background: #fdf7f2; border-left: 3px solid var(--bronze); }
.board-row.row-gold:hover   { background: #fff8d6; }
.board-row.row-silver:hover { background: #edeef5; }
.board-row.row-bronze:hover { background: #f7ede3; }

.rank-num.tier-gold   { color: var(--gold);   font-weight: 800; }
.rank-num.tier-silver { color: var(--silver); font-weight: 800; }
.rank-num.tier-bronze { color: var(--bronze); font-weight: 800; }

.medal-emoji { cursor: default; display: inline-block; }

/* Student name */
.student-info { display: flex; align-items: center; gap: 12px; }
.student-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.78rem;
  flex-shrink: 0; border: 1.5px solid;
}
.student-name { font-weight: 600; font-size: 0.92rem; line-height: 1.25; color: var(--text); }
.student-name.is-me { color: var(--accent); }

/* Group chip */
.group-chip {
  display: inline-block;
  font-size: 0.68rem; font-weight: 700;
  padding: 3px 10px; border-radius: var(--ui-radius-xl);
  border: 1.5px solid;
  white-space: nowrap;
}

/* Progress bar */
.col-total { font-weight: 700; font-size: 0.92rem; color: var(--text); text-align: center; }
.board-header-row .col-total { font-weight: 700; font-size: 0.68rem; color: var(--text-muted); text-align: right; }

.prog-wrap { display: flex; align-items: center; gap: 8px; }
.prog-bar-bg {
  flex: 1; height: 8px;
  background: var(--border);
  border-radius: var(--ui-radius-pill); overflow: hidden;
}
.prog-bar-inner {
  display: flex; height: 100%;
  opacity: 0; transition: opacity 0.2s;
}
.prog-seg {
  height: 100%; cursor: pointer; min-width: 2px;
  transition: flex 0.7s cubic-bezier(0.4,0,0.2,1);
}
.prog-seg + .prog-seg { box-shadow: -1px 0 0 rgba(248,250,252,0.8); }

.prog-header-legend {
  display: flex; align-items: center; gap: 4px;
  font-size: 0.62rem; font-weight: 600; color: var(--text-muted);
  text-transform: none; letter-spacing: 0;
}
.prog-legend-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }

.prog-tooltip {
  position: fixed; z-index: 9999;
  background: var(--loc-dark, #05071D);
  color: #fff;
  font-family: inherit;
  font-size: 0.72rem; font-weight: 600;
  line-height: 1.5;
  padding: 6px 10px; border-radius: 7px;
  pointer-events: none; opacity: 0;
  transform: translate(-50%, -100%) translateY(-8px);
  transition: opacity 0.12s;
  white-space: nowrap;
}
.prog-tooltip.visible { opacity: 1; }

/* User context rows */
.board-row.row-me {
  border: 1px solid var(--accent) !important;
  border-left: 3px solid var(--accent) !important;
}
.board-row.row-me:hover { background: rgba(56,68,255,0.06) !important; }
.board-row.row-dim { opacity: 0.65; }

.you-tag {
  font-size: 0.62rem;
  color: var(--accent);
  font-weight: 700;
  margin-left: 5px;
  background: var(--accent-bg);
  border: 1px solid rgba(56,68,255,0.25);
  padding: 1px 5px;
  border-radius: var(--ui-radius-xs);
  vertical-align: middle;
}

.context-divider {
  display: flex; align-items: center; gap: 10px;
  padding: 4px 1.4rem;
  background: var(--surface2);
}
.context-divider span {
  font-size: 0.65rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--accent);
  white-space: nowrap;
}
.context-divider::before,
.context-divider::after {
  content: ''; flex: 1; height: 1px;
  background: var(--border-dark);
}

/* ===========================
   PAGINATION
   =========================== */
.pagination {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 1rem 1.4rem;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}
.pg-btn {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--ui-radius-md);
  color: var(--text-sub);
  font-family: inherit;
  font-weight: 600;
  font-size: 0.8rem;
  width: 34px; height: 34px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.pg-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.pg-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.pg-btn:disabled { opacity: 0.35; cursor: default; }
.pg-arrow {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--ui-radius-md);
  color: var(--text-sub);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0 12px; height: 34px;
  cursor: pointer;
  display: flex; align-items: center; gap: 4px;
  transition: all 0.15s;
}
.pg-arrow:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.pg-arrow:disabled { opacity: 0.35; cursor: default; }
.pg-info {
  font-size: 0.75rem; font-weight: 500; color: var(--text-muted);
  margin: 0 6px;
}

/* ===========================
   SECTION CONTROLS
   =========================== */
.section-controls {
  display: flex; align-items: center; gap: 8px;
  flex-shrink: 0;
}
.select-wrap {
  position: relative; display: flex; align-items: center;
}
.select-wrap select {
  appearance: none;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--ui-radius-md);
  color: var(--text);
  font-family: inherit;
  font-size: 0.8rem; font-weight: 600;
  padding: 6px 28px 6px 10px;
  cursor: pointer; outline: none;
  transition: border-color 0.15s;
  min-width: 138px;
}
.select-wrap select:hover,
.select-wrap select:focus { border-color: var(--accent); }
.select-arrow {
  position: absolute; right: 9px; pointer-events: none;
  color: var(--text-muted);
}

/* ===========================
   LOADING STATE
   =========================== */
.loading-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

/* ===========================
   SCROLLBAR
   =========================== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 3px; }

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 1024px) {
  main { padding: 2rem 1.5rem 4rem; }
}

@media (max-width: 768px) {
  header { padding: 0 1rem; gap: 1rem; }
  main { padding: 1.5rem 1rem 4rem; }
  .board-header-row, .board-row { grid-template-columns: 38px 1fr 80px 80px; }
  .col-progress { display: none; }
  .section-header h1 { font-size: 1.7rem; }
  .header-link { display: none; }
  .section-controls { width: 100%; }
}