/* PhD Square - Open Opportunities Finder
   Floating "Find Opportunities" button plus a popover panel.
   Self-contained: the JS injects all markup into <body>, so there is nothing
   to place in the page except this stylesheet and the script.
   Colours reuse the site's own CSS variables (--accent, --gold, etc.) with
   fallbacks, so the widget matches every page automatically.
   Everything is scoped under the .opf- prefix to avoid cascade conflicts. */

.opf-root {
  --opf-green: var(--accent, #2d5f3f);
  --opf-green-dark: var(--accent-2, #1f4a2c);
  --opf-gold: var(--gold, #b08530);
  --opf-surface: var(--surface, #ffffff);
  --opf-elev: var(--bg-elev, #fbf7ec);
  --opf-ink: var(--ink, #1a1611);
  --opf-ink-2: var(--ink-2, #3a3328);
  --opf-ink-3: var(--ink-3, #7a6c54);
  --opf-ink-4: var(--ink-4, #a3957c);
  --opf-border: var(--border-soft, #e8dfc8);
  --opf-head: 'Fraunces', Georgia, serif;
  --opf-body: 'Manrope', system-ui, sans-serif;

  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 9000;
  font-family: var(--opf-body);
}

/* ===== Launcher (FAB) ===== */
.opf-fab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--opf-body);
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--opf-green);
  border: none;
  border-radius: 999px;
  padding: 0.7rem 1.15rem;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(26,22,17,0.18);
  transition: background 0.2s ease, transform 0.15s ease;
}
.opf-fab:hover { background: var(--opf-green-dark); }
.opf-fab:active { transform: translateY(1px); }
.opf-fab:focus-visible { outline: 2px solid var(--opf-green-dark); outline-offset: 2px; }
.opf-fab svg { width: 17px; height: 17px; flex-shrink: 0; }
.opf-fab-label { white-space: nowrap; }

/* ===== Panel ===== */
.opf-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 12px);
  width: 380px;
  max-width: calc(100vw - 32px);
  max-height: 72vh;
  background: var(--opf-surface);
  border: 1px solid var(--opf-border);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(26,22,17,0.22);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform-origin: bottom right;
  opacity: 0;
  transform: scale(0.96) translateY(6px);
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
}
.opf-root.opf-open .opf-panel {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}
.opf-root.opf-open .opf-fab { background: var(--opf-green-dark); }

/* ===== Header ===== */
.opf-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 1rem 1.1rem 0.85rem;
  border-bottom: 1px solid var(--opf-border);
}
.opf-head h2 {
  font-family: var(--opf-head);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--opf-ink);
  margin: 0;
}
.opf-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--opf-ink-3);
  padding: 4px;
  line-height: 0;
  border-radius: 6px;
}
.opf-close:hover { color: var(--opf-ink); }
.opf-close:focus-visible { outline: 2px solid var(--opf-green); outline-offset: 2px; }
.opf-close svg { width: 18px; height: 18px; }

/* ===== Category chips ===== */
.opf-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--opf-border);
}
.opf-chip {
  font-family: var(--opf-body);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--opf-ink-2);
  background: var(--opf-elev);
  border: 1px solid var(--opf-border);
  border-radius: 999px;
  padding: 5px 11px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.opf-chip:hover { border-color: var(--opf-green); }
.opf-chip:focus-visible { outline: 2px solid var(--opf-green); outline-offset: 2px; }
.opf-chip[aria-pressed="true"] {
  background: var(--opf-green);
  border-color: var(--opf-green);
  color: #fff;
}

/* ===== Results ===== */
.opf-results {
  padding: 0 1.1rem 1rem;
  overflow-y: auto;
}
.opf-count {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--opf-ink-4);
  padding: 0.9rem 0 0.3rem;
}
.opf-card {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--opf-border);
}
.opf-card:last-child { border-bottom: none; }
.opf-card-title {
  font-family: var(--opf-head);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.3;
  margin: 0 0 0.45rem;
}
.opf-card-title a { color: var(--opf-ink); text-decoration: none; }
.opf-card-title a:hover { color: var(--opf-green); text-decoration: underline; }
.opf-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--opf-ink-3);
}
.opf-deadline { font-weight: 600; color: var(--opf-ink-2); }
.opf-badge {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(45,95,63,0.10);
  color: var(--opf-green);
  white-space: nowrap;
}
.opf-badge.opf-urgent { background: rgba(161,68,47,0.13); color: #a1442f; }
.opf-badge.opf-ongoing { background: rgba(176,133,48,0.16); color: #8a6717; }
.opf-empty, .opf-error {
  font-size: 0.85rem;
  color: var(--opf-ink-3);
  padding: 1rem 0;
  line-height: 1.5;
}

/* ===== Mobile ===== */
@media (max-width: 480px) {
  .opf-root { right: 16px; bottom: 16px; }
  .opf-panel {
    position: fixed;
    right: 16px;
    left: 16px;
    bottom: 76px;
    width: auto;
    max-width: none;
    max-height: 70vh;
  }
  .opf-fab-label { display: none; }
  .opf-fab { padding: 0.85rem; }
}
@media (prefers-reduced-motion: reduce) {
  .opf-panel, .opf-fab { transition: none; }
}
