/* central — UI Components */

/* ── Buttons ─────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 0 16px; height: 36px;
  border-radius: var(--r); border: 1px solid transparent;
  font-size: .875rem; font-weight: 500; cursor: pointer;
  transition: all .15s ease; white-space: nowrap; text-decoration: none;
  line-height: 1;
}
.btn-primary   { background: var(--brand); color: #fff; border-color: var(--brand-mid); }
.btn-primary:hover { background: var(--brand-mid); }
.btn-secondary { background: var(--bg-3); color: var(--t1); border-color: var(--border-2); }
.btn-secondary:hover { background: var(--bg-4); border-color: var(--border-3); }
.btn-ghost     { background: transparent; color: var(--t2); border-color: transparent; }
.btn-ghost:hover { background: var(--bg-3); color: var(--t1); }
.btn-danger    { background: var(--danger-dim); color: var(--danger); border-color: rgba(217,56,56,.25); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { height: 30px; padding: 0 12px; font-size: .8125rem; }
.btn-lg { height: 44px; padding: 0 22px; font-size: 1rem; }
.btn-icon { width: 36px; padding: 0; justify-content: center; }
.btn-icon.btn-sm { width: 30px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ── Cards ───────────────────────────────── */
.card {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 20px 24px;
}
.card-sm { padding: 14px 18px; }
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 18px; padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.card-title { font-size: 1rem; font-weight: 600; color: var(--t1); }

/* ── Forms ───────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block; margin-bottom: 6px;
  font-size: .8125rem; font-weight: 500; color: var(--t2);
}
.form-label.required::after { content: ' *'; color: var(--danger); }
.form-control {
  width: 100%; height: 38px; padding: 0 12px;
  background: var(--bg-1); border: 1px solid var(--border-2);
  border-radius: var(--r); color: var(--t1); font-size: .9rem;
  transition: border-color .15s;
  outline: none;
}
.form-control:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-dim); }
.form-control::placeholder { color: var(--t3); }
textarea.form-control { height: auto; padding: 10px 12px; resize: vertical; min-height: 90px; }
select.form-control { cursor: pointer; }
.form-hint { margin-top: 5px; font-size: .8rem; color: var(--t3); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ── Badges ──────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 9px; border-radius: 20px;
  font-size: .75rem; font-weight: 500; line-height: 1.5;
}
.badge-success { background: var(--success-dim); color: var(--success); }
.badge-warning { background: var(--warning-dim); color: var(--warning); }
.badge-danger  { background: var(--danger-dim);  color: var(--danger);  }
.badge-info    { background: var(--info-dim);     color: var(--info);    }
.badge-gray    { background: var(--bg-4);         color: var(--t2);      }
.badge-brand   { background: var(--brand-dim);    color: var(--brand-hi);}

/* ── Tables ──────────────────────────────── */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.table th {
  padding: 10px 14px; text-align: left;
  font-size: .75rem; font-weight: 600; color: var(--t2);
  border-bottom: 1px solid var(--border-2);
  white-space: nowrap; letter-spacing: .04em; text-transform: uppercase;
}
.table td { padding: 13px 14px; border-bottom: 1px solid var(--border); color: var(--t1); }
.table tbody tr:hover td { background: var(--bg-3); }
.table tbody tr:last-child td { border-bottom: none; }
.table .col-actions { text-align: right; white-space: nowrap; }

/* ── Stat Cards ──────────────────────────── */
.stat-card {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 18px 22px;
}
.stat-label { font-size: .8rem; color: var(--t2); margin-bottom: 8px; font-weight: 500; }
.stat-value { font-size: 1.75rem; font-weight: 700; color: var(--t1); line-height: 1; }
.stat-sub   { font-size: .8rem; color: var(--t3); margin-top: 4px; }
.stat-up    { color: var(--success); }
.stat-down  { color: var(--danger); }

/* ── Alerts ──────────────────────────────── */
.alert {
  padding: 12px 16px; border-radius: var(--r);
  font-size: .875rem; border: 1px solid transparent;
  display: flex; align-items: flex-start; gap: 10px;
}
.alert-success { background: var(--success-dim); color: var(--success); border-color: rgba(24,179,98,.2); }
.alert-warning { background: var(--warning-dim); color: var(--warning); border-color: rgba(224,144,24,.2); }
.alert-danger  { background: var(--danger-dim);  color: var(--danger);  border-color: rgba(217,56,56,.2); }
.alert-info    { background: var(--info-dim);     color: var(--info);    border-color: rgba(48,128,232,.2); }

/* ── Tabs ────────────────────────────────── */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 24px; }
.tab {
  padding: 10px 18px; font-size: .875rem; color: var(--t2); cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: all .15s; text-decoration: none;
}
.tab:hover { color: var(--t1); }
.tab.active { color: var(--t1); border-bottom-color: var(--brand); font-weight: 500; }

/* ── Empty State ─────────────────────────── */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--t2);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: 14px; opacity: .4; }
.empty-state h3   { font-size: 1rem; color: var(--t1); margin-bottom: 6px; }
.empty-state p    { font-size: .875rem; margin-bottom: 18px; }

/* ── Modal ───────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.65);
  display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 20px;
  opacity: 0; pointer-events: none; transition: opacity .2s;
}
.modal-backdrop.open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--bg-2); border: 1px solid var(--border-2);
  border-radius: var(--r-lg); width: 100%; max-width: 560px;
  max-height: 90vh; overflow-y: auto;
  transform: translateY(12px); transition: transform .2s;
}
.modal-backdrop.open .modal { transform: translateY(0); }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px; border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 1rem; font-weight: 600; }
.modal-body   { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }

/* ── Dropdown ────────────────────────────── */
.dropdown { position: relative; display: inline-block; }
.dropdown-menu {
  position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--bg-2); border: 1px solid var(--border-2);
  border-radius: var(--r-lg); min-width: 180px; padding: 6px;
  box-shadow: var(--shadow); z-index: 50;
  opacity: 0; pointer-events: none; transform: translateY(-6px);
  transition: all .15s;
}
.dropdown.open .dropdown-menu { opacity: 1; pointer-events: auto; transform: translateY(0); }
.dropdown-item {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 12px; border-radius: var(--r); font-size: .875rem;
  color: var(--t1) !important; cursor: pointer; transition: background .1s;
  background: none !important; border: none; width: 100%; text-align: left;
  font-family: inherit; line-height: 1.4;
}
.dropdown-item:hover { background: var(--bg-3) !important; }
.dropdown-item.danger { color: var(--danger) !important; }
.dropdown-divider { height: 1px; background: var(--border); margin: 4px 0; }

/* ── Page Header ─────────────────────────── */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 28px;
}
.page-header h1 { font-size: 1.375rem; font-weight: 700; }
.page-header-actions { display: flex; gap: 8px; align-items: center; }

/* ── Grid helpers ────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 14px; }

/* ── Utilities ───────────────────────────── */
.text-muted { color: var(--t2); }
.text-dim   { color: var(--t3); }
.text-sm    { font-size: .875rem; }
.text-xs    { font-size: .8rem; }
.text-right { text-align: right; }
.text-center{ text-align: center; }
.fw-500     { font-weight: 500; }
.fw-600     { font-weight: 600; }
.fw-700     { font-weight: 700; }
.mb-0  { margin-bottom: 0; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.divider { height: 1px; background: var(--border); margin: 20px 0; }

.dropdown-menu button {
  display: flex !important;
  align-items: center !important;
  gap: 9px !important;
  padding: 8px 12px !important;
  border-radius: var(--r) !important;
  font-size: .875rem !important;
  color: var(--t1) !important;
  cursor: pointer !important;
  background: transparent !important;
  border: none !important;
  width: 100% !important;
  text-align: left !important;
  font-family: inherit !important;
  line-height: 1.4 !important;
}
.dropdown-menu button:hover {
  background: var(--bg-3) !important;
}