/* ════════════════════════════════════════════
   ACDC — Academic Committee for Data Challenges
   style.css
   ════════════════════════════════════════════ */

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

:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface2: #f8f9fb;
  --border: #e4e6ea;
  --border2: #d0d3d9;
  --text: #1a1d23;
  --text2: #5a5f6b;
  --text3: #8a8f9b;
  --accent: #1a6b4a;
  --accent-light: #e6f4ee;
  --accent2: #2563a8;
  --accent2-light: #e8f0fb;
  --purple: #5b45b0;
  --purple-light: #eeebfa;
  --amber: #9a6200;
  --amber-light: #fef3d7;
  --row-alt: #f4f6f9;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 4px rgba(0,0,0,.07), 0 4px 16px rgba(0,0,0,.05);
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding: 0;
}

/* ── Header ── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo-mark {
  width: 40px; height: 40px;
  background: var(--accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 15px; flex-shrink: 0;
}
header h1 { font-size: 20px; font-weight: 600; letter-spacing: -.3px; }
header p  { font-size: 13px; color: var(--text2); margin-top: 1px; }

/* ── Nav tabs ── */
nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 2.5rem;
  display: flex; gap: 0;
  overflow-x: auto;
}
.nav-tab {
  padding: 14px 20px;
  font-size: 14px; font-weight: 500;
  color: var(--text2);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color .15s, border-color .15s;
  white-space: nowrap;
}
.nav-tab:hover { color: var(--text); }
.nav-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Main layout ── */
main { max-width: 1280px; margin: 0 auto; padding: 2rem 2.5rem; }
.page { display: none; }
.page.active { display: block; }

/* ── Section ── */
.section { margin-bottom: 2.5rem; }
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1rem; flex-wrap: wrap; gap: .5rem;
}
.section-title {
  font-size: 17px; font-weight: 600; display: flex; align-items: center; gap: 8px;
}
.section-count {
  font-size: 12px; background: var(--accent-light); color: var(--accent);
  padding: 2px 9px; border-radius: 20px; font-weight: 600;
}

/* ── Search box ── */
.search-wrap { position: relative; }
.search-wrap svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); opacity: .4; pointer-events: none; }
.search-input {
  padding: 8px 12px 8px 34px;
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  font-size: 13px;
  background: var(--surface);
  color: var(--text);
  width: 220px;
  outline: none;
  transition: border-color .15s;
}
.search-input:focus { border-color: var(--accent); }

/* ── Table card ── */
.table-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.custom-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.custom-table thead th {
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  padding: 11px 14px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .5px;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
.custom-table thead th:hover { color: var(--text); }
.sort-icon { opacity: .35; margin-left: 4px; font-size: 10px; }
.sort-icon.asc::after  { content: '▲'; }
.sort-icon.desc::after { content: '▼'; }
.sort-icon.none::after { content: '⬍'; }
.custom-table tbody tr { border-bottom: 1px solid var(--border); transition: background .1s; }
.custom-table tbody tr:last-child { border-bottom: none; }
.custom-table tbody tr:nth-child(even) { background: var(--row-alt); }
.custom-table tbody tr:hover { background: #eef6f1; }
.custom-table td { padding: 11px 14px; vertical-align: top; }

/* ── Badges ── */
.badge {
  display: inline-block; font-size: 11px; font-weight: 600;
  padding: 2px 9px; border-radius: 20px; white-space: nowrap;
}
.badge-bio       { background: var(--accent-light);  color: var(--accent); }
.badge-etudiant  { background: var(--purple-light);  color: var(--purple); }
.badge-chercheur { background: var(--amber-light);   color: var(--amber); }
.badge-challenge { background: var(--accent-light);  color: var(--accent); }
.badge-formation { background: var(--purple-light);  color: var(--purple); }
.badge-autre     { background: #f0f1f3;              color: var(--text2); }
.badge-avail     { background: var(--accent-light);  color: var(--accent); }
.badge-unavail   { background: #fdeaea;              color: #a32d2d; }
.badge-conf      { background: var(--accent2-light); color: var(--accent2); }

/* ── Links ── */
a.link-git, a.link-challenge, a.link-mail, a.link-url {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; font-weight: 500; padding: 4px 9px;
  border-radius: var(--radius-sm); text-decoration: none; transition: background .15s;
  white-space: nowrap;
}
a.link-git       { background: #f0f1f3;              color: #444;          border: 1px solid var(--border); }
a.link-git:hover { background: #e4e5e8; }
a.link-challenge { background: var(--accent-light);  color: var(--accent); border: 1px solid #c1dfd1; }
a.link-challenge:hover { background: #d0eddf; }
a.link-url       { background: var(--accent2-light); color: var(--accent2);border: 1px solid #c0d5f0; }
a.link-url:hover { background: #d5e5f9; }
a.link-mail      { background: var(--accent2-light); color: var(--accent2);border: 1px solid #c0d5f0; }
a.link-mail:hover { background: #d5e5f9; }

/* ── Pagination ── */
.table-footer {
  padding: 10px 14px;
  background: var(--surface2);
  border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: var(--text2); flex-wrap: wrap; gap: 8px;
}
.pagination { display: flex; gap: 4px; }
.page-btn {
  min-width: 28px; height: 28px; padding: 0 8px;
  border: 1px solid var(--border2); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text2);
  font-size: 12px; cursor: pointer; transition: all .15s;
}
.page-btn:hover:not(:disabled) { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }
.page-btn.active { background: var(--accent); border-color: var(--accent); color: white; }
.page-btn:disabled { opacity: .4; cursor: default; }

/* ── Empty state ── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text3); font-size: 14px; }

/* ── Calendar toolbar ── */
.mgr-toolbar {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 1.2rem; flex-wrap: wrap;
}
.mgr-toolbar select {
  padding: 7px 11px; border: 1px solid var(--border2); border-radius: var(--radius-sm);
  font-size: 13px; background: var(--surface); color: var(--text); outline: none;
}
.mgr-toolbar select:focus { border-color: var(--accent); }
.spacer { flex: 1; }

/* ── Buttons ── */
.btn {
  padding: 8px 16px; border-radius: var(--radius-sm); font-size: 13px;
  font-weight: 500; cursor: pointer; border: 1px solid transparent; transition: all .15s;
}
.btn-accent  { background: var(--accent); color: white; border-color: var(--accent); }
.btn-accent:hover  { background: #155c3d; }
.btn-outline { background: var(--surface); color: var(--text2); border-color: var(--border2); }
.btn-outline:hover { background: var(--bg); }
.btn-danger  { background: #fdeaea; color: #a32d2d; border-color: #f5c0c0; }
.btn-danger:hover  { background: #f9d0d0; }
.btn-sm { padding: 5px 11px; font-size: 12px; }

/* ── Event cards ── */
.event-grid { display: grid; gap: 12px; }
.event-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 14px 16px; display: flex; gap: 14px; align-items: flex-start;
}
.event-card.past { opacity: .6; }
.event-date-block {
  flex-shrink: 0; width: 58px; text-align: center;
  background: var(--accent-light); border-radius: 8px; padding: 6px 4px;
}
.event-date-block .day { font-size: 22px; font-weight: 700; color: var(--accent); line-height: 1; }
.event-date-block .mon { font-size: 11px; font-weight: 600; color: var(--accent); text-transform: uppercase; }
.event-date-block .yr  { font-size: 11px; color: var(--accent); opacity: .7; }
.event-body { flex: 1; min-width: 0; }
.event-body h3 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.event-meta { font-size: 12px; color: var(--text2); display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.event-desc { font-size: 13px; color: var(--text2); margin-bottom: 8px; }
.res-chips  { display: flex; flex-wrap: wrap; gap: 5px; }
.res-chip {
  font-size: 11px; padding: 2px 9px; border-radius: 20px;
  border: 1px solid var(--border); background: var(--surface2); color: var(--text2);
}
.res-chip.human  { background: var(--purple-light); color: var(--purple); border-color: #d4ceef; }
.event-actions { display: flex; flex-direction: column; gap: 6px; align-items: flex-end; flex-shrink: 0; }
.event-link { margin-top: 4px; }

/* ── Resource grid ── */
.res-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.res-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 14px 16px; display: flex; gap: 12px; align-items: flex-start;
}
.res-avatar {
  width: 38px; height: 38px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 18px;
}
.res-avatar.human  { background: var(--purple-light); }
.res-avatar.worker { background: var(--accent-light); }
.res-info { flex: 1; min-width: 0; }
.res-name    { font-size: 14px; font-weight: 600; }
.res-role    { font-size: 12px; color: var(--text2); margin-top: 2px; }
.res-contact { font-size: 11px; color: var(--accent2); margin-top: 3px; }

/* ── Timeline ── */
.tl-wrap { border-left: 2px solid var(--border); padding-left: 1.5rem; margin-left: .5rem; }
.tl-item { position: relative; margin-bottom: 14px; }
.tl-item::before {
  content: ''; position: absolute; left: -1.9rem; top: 5px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg);
}
.tl-item.past::before { background: var(--text3); }
.tl-item.approx::before { background: var(--amber); }
.tl-date  { font-size: 11px; color: var(--text3); margin-bottom: 2px; }
.tl-title { font-size: 14px; font-weight: 500; display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }

/* ── Modals ── */
.overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.35);
  z-index: 200; align-items: center; justify-content: center;
}
.overlay.open { display: flex; }
.modal {
  background: var(--surface); border-radius: var(--radius);
  box-shadow: 0 8px 40px rgba(0,0,0,.18);
  padding: 1.5rem; width: min(540px, 96vw); max-height: 92vh; overflow-y: auto;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.2rem; }
.modal-header h3 { font-size: 16px; font-weight: 600; }
.close-x { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text2); line-height: 1; padding: 0 4px; }
.form-row { margin-bottom: 12px; }
.form-row label { display: block; font-size: 12px; font-weight: 500; color: var(--text2); margin-bottom: 4px; }
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%; padding: 8px 11px;
  border: 1px solid var(--border2); border-radius: var(--radius-sm);
  font-size: 13px; background: var(--surface); color: var(--text); outline: none;
  transition: border-color .15s;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus { border-color: var(--accent); }
.form-row textarea { height: 70px; resize: vertical; }
.form-row select[multiple] { height: 100px; }
.form-hint { font-size: 11px; color: var(--text3); margin-top: 4px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 1rem; gap: 8px; }
.form-actions-right { display: flex; gap: 8px; }
.auth-note { font-size: 11px; color: var(--text3); margin-top: .75rem; text-align: center; }
.auth-err  { font-size: 12px; color: #a32d2d; margin-top: 5px; display: none; }

/* ── Footer ── */
footer {
  text-align: center; margin-top: 3rem; padding: 1.5rem 2.5rem;
  border-top: 1px solid var(--border); font-size: 12px; color: var(--text3);
}

/* ── Responsive ── */
@media (max-width: 700px) {
  main   { padding: 1rem; }
  header { padding: 1rem; }
  nav    { padding: 0 1rem; }
  .grid2 { grid-template-columns: 1fr; }
  .event-card { flex-direction: column; gap: 8px; }
  .search-input { width: 160px; }
}

/* ── Gantt ── */
.gantt-legend {
  display: flex; flex-wrap: wrap; gap: 14px;
  padding: 10px 4px 4px;
  font-size: 12px; color: var(--text2);
}
.gantt-leg-item { display: flex; align-items: center; gap: 5px; }
.gantt-leg-dot  {
  width: 14px; height: 14px; border-radius: 3px;
  border: 1.5px solid transparent; display: inline-block;
}
.gantt-bar rect { transition: opacity .15s; }
.gantt-bar:hover rect { opacity: .8; cursor: default; }