/* ─── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #f4f5f9;
  --surface:   #ffffff;
  --surface2:  #f0f1f6;
  --border:    #dde0ea;
  --accent:    #5046e5;
  --accent-h:  #6c63ff;
  --danger:    #d63b3b;
  --success:   #2e8f5f;
  --warn:      #c47d0a;
  --text:      #1a1d2e;
  --text-muted:#6b7080;
  --radius:    10px;
  --shadow:    0 4px 24px rgba(0,0,0,.10);
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 0;
}

/* ─── Nav bar ───────────────────────────────────────────────── */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar .logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .5px;
  text-decoration: none;
}
.navbar .logo span { color: var(--text); }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: .85rem;
  padding: 6px 14px;
  border-radius: 6px;
  transition: background .15s, color .15s;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--surface2);
  color: var(--text);
}

/* ─── Page wrapper ──────────────────────────────────────────── */
.page { max-width: 860px; margin: 0 auto; padding: 40px 24px 80px; }

.page-header { margin-bottom: 32px; }
.page-header h1 { font-size: 1.6rem; font-weight: 700; }
.page-header p  { color: var(--text-muted); margin-top: 6px; font-size: .9rem; }

/* ─── Lab name bar ──────────────────────────────────────────── */
.lab-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.lab-bar label { color: var(--text-muted); font-size: .85rem; white-space: nowrap; }
.lab-bar input {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: .95rem;
  padding: 8px 12px;
  outline: none;
  transition: border-color .15s;
}
.lab-bar input:focus { border-color: var(--accent); }

/* ─── Toolbar ───────────────────────────────────────────────── */
.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border-radius: 7px;
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .15s, box-shadow .15s, opacity .15s;
  text-decoration: none;
}
.btn-primary   { background: var(--accent);  color: #fff; }
.btn-primary:hover { background: var(--accent-h); }
.btn-ghost     { background: transparent; border-color: var(--border); color: var(--text-muted); }
.btn-ghost:hover { background: var(--surface2); color: var(--text); }
.btn-danger    { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-success   { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { opacity: .88; }
.btn-sm { padding: 5px 12px; font-size: .8rem; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

/* ─── Rubric list ───────────────────────────────────────────── */
.rubric-list { display: flex; flex-direction: column; gap: 10px; }

.rubric-list .empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
}
.rubric-list .empty-state strong { display: block; font-size: 1rem; color: var(--text); margin-bottom: 6px; }

/* ─── Rubric card ───────────────────────────────────────────── */
.rubric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .15s, box-shadow .15s;
}
.rubric-card.drag-over { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(108,99,255,.25); }

.card-row {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  gap: 14px;
}

.drag-handle {
  color: var(--text-muted);
  cursor: grab;
  font-size: 1rem;
  opacity: .5;
  flex-shrink: 0;
  user-select: none;
}
.drag-handle:active { cursor: grabbing; }

.card-name {
  font-weight: 600;
  font-size: .95rem;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-condition {
  color: var(--text-muted);
  font-size: .82rem;
  flex: 2;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .4px;
  text-transform: uppercase;
  flex-shrink: 0;
}
.badge-static  { background: rgba(76,175,125,.15); color: var(--success); }
.badge-llm     { background: rgba(108,99,255,.15); color: var(--accent-h); }
.badge-test    { background: rgba(224,168,74,.15);  color: var(--warn); }

.card-marks {
  font-size: .85rem;
  color: var(--text-muted);
  flex-shrink: 0;
  white-space: nowrap;
}
.card-marks strong { color: var(--text); font-weight: 700; }

.card-actions { display: flex; gap: 6px; flex-shrink: 0; }
.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 5px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  transition: background .12s, color .12s;
  font-size: .9rem;
}
.icon-btn:hover { background: var(--surface2); color: var(--text); }
.icon-btn.delete:hover { color: var(--danger); }

/* ─── Inline edit form ──────────────────────────────────────── */
.edit-form {
  border-top: 1px solid var(--border);
  background: var(--surface2);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.edit-form .full-width { grid-column: 1 / -1; }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .78rem; color: var(--text-muted); font-weight: 500; letter-spacing: .3px; }
.form-group input,
.form-group textarea,
.form-group select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: .9rem;
  padding: 9px 12px;
  outline: none;
  font-family: inherit;
  transition: border-color .15s;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--accent); }
.form-group select option { background: var(--surface2); }

.type-selector { display: flex; gap: 8px; }
.type-selector label {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 10px 6px 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
  font-size: .75rem;
  color: var(--text-muted);
  transition: border-color .15s, background .15s;
  letter-spacing: .3px;
  text-transform: uppercase;
  font-weight: 600;
}
.type-selector input[type=radio] { display: none; }
.type-selector label:has(input:checked) { border-color: var(--accent); background: rgba(108,99,255,.12); color: var(--accent-h); }
.type-selector .type-icon { font-size: 1.2rem; }

.form-actions { grid-column: 1 / -1; display: flex; gap: 10px; padding-top: 4px; }

/* ─── Add item panel (collapsed/expanded) ───────────────────── */
#add-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
  display: none;
}
#add-panel.open { display: block; }
#add-panel .panel-header {
  padding: 14px 20px;
  font-weight: 600;
  font-size: .9rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

/* ─── Total footer ──────────────────────────────────────────── */
.total-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: .9rem;
  z-index: 99;
}
.total-bar .item-count { color: var(--text-muted); }
.total-bar .total-marks {
  font-size: 1rem;
  font-weight: 700;
}
.total-bar .total-marks span { color: var(--accent); font-size: 1.2rem; }

/* ─── Toast ─────────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 20px;
  font-size: .85rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  white-space: nowrap;
  box-shadow: var(--shadow);
  z-index: 200;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.success { border-color: var(--success); color: var(--success); }
#toast.error   { border-color: var(--danger);  color: var(--danger);  }

/* ─── Confirm dialog ────────────────────────────────────────── */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.35);
  display: flex; align-items: center; justify-content: center;
  z-index: 300;
  opacity: 0; pointer-events: none; transition: opacity .2s;
}
.overlay.open { opacity: 1; pointer-events: all; }
.dialog {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 32px;
  max-width: 360px;
  width: 90%;
  box-shadow: var(--shadow);
}
.dialog h3 { font-size: 1rem; margin-bottom: 10px; }
.dialog p  { color: var(--text-muted); font-size: .88rem; margin-bottom: 22px; line-height: 1.5; }
.dialog .dialog-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c4c8d8; border-radius: 3px; }

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 600px) {
  .card-condition { display: none; }
  .edit-form { grid-template-columns: 1fr; }
  .edit-form .full-width { grid-column: 1; }
  .form-actions { flex-direction: column; }
  .total-bar { padding: 12px 16px; }
  .page { padding: 24px 14px 80px; }
}