/* ============ SchoolFinance UI ============ */
:root {
  --bg: #0b1220;
  --bg-2: #0f1829;
  --card: #131e33;
  --card-2: #182540;
  --border: #223050;
  --text: #e6edf7;
  --text-dim: #8fa3c0;
  --text-faint: #5d7091;
  --accent: #4f7cff;
  --accent-2: #6d8dff;
  --green: #22c55e;
  --red: #ef4444;
  --amber: #f59e0b;
  --purple: #a78bfa;
  --radius: 12px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

.app { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 240px;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 18px;
  border-bottom: 1px solid var(--border);
}

.brand-logo {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  font-size: 22px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  border-radius: 10px;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 15px; }
.brand-text span { font-size: 11px; color: var(--text-faint); }

.nav { padding: 14px 10px; display: flex; flex-direction: column; gap: 2px; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 500;
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}

.nav-item:hover { background: var(--card); color: var(--text); }
.nav-item.active {
  background: linear-gradient(135deg, rgba(79,124,255,0.18), rgba(167,139,250,0.12));
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(79,124,255,0.35);
}

.nav-icon { width: 20px; text-align: center; font-size: 16px; }

.sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--text-faint);
  font-size: 11px;
}

.conn-status { display: flex; align-items: center; gap: 8px; color: var(--text-dim); font-size: 12px; }
.conn-status .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--amber);
}
.conn-status.ok .dot { background: var(--green); }
.conn-status.err .dot { background: var(--red); }

/* ---------- Main ---------- */
.main { flex: 1; padding: 0 28px 40px; min-width: 0; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.topbar-title h1 { font-size: 22px; font-weight: 700; }
.topbar-title p { color: var(--text-dim); font-size: 13px; margin-top: 2px; }

.topbar-actions { display: flex; align-items: center; gap: 10px; }
.topbar-date { color: var(--text-dim); font-size: 13px; margin-right: 6px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 15px;
  border-radius: 9px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s, background 0.15s, transform 0.05s;
  background: var(--card);
  color: var(--text);
}
.btn:hover { filter: brightness(1.12); }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.btn-danger { background: rgba(239,68,68,0.15); color: #fca5a5; border-color: rgba(239,68,68,0.35); }
.btn-success { background: rgba(34,197,94,0.15); color: #86efac; border-color: rgba(34,197,94,0.35); }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text-dim); }
.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 7px; }
.btn-icon { padding: 6px 9px; font-size: 13px; }

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 10px;
  flex-wrap: wrap;
}

.card-header h3 { font-size: 15px; font-weight: 650; }
.card-header p { color: var(--text-dim); font-size: 12px; margin-top: 2px; }

/* ---------- Stat cards ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--stat-color, var(--accent));
}

.stat-card .stat-label { color: var(--text-dim); font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-card .stat-value { font-size: 26px; font-weight: 750; letter-spacing: -0.02em; }
.stat-card .stat-sub { color: var(--text-faint); font-size: 12px; }

.stat-green { --stat-color: var(--green); }
.stat-red { --stat-color: var(--red); }
.stat-amber { --stat-color: var(--amber); }
.stat-purple { --stat-color: var(--purple); }
.stat-blue { --stat-color: var(--accent); }

/* ---------- Grids ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
@media (max-width: 1000px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
  text-align: left;
  padding: 12px 14px;
  background: var(--card-2);
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
tbody td { padding: 11px 14px; border-top: 1px solid var(--border); vertical-align: middle; }
tbody tr:hover { background: rgba(255,255,255,0.02); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
tr.clickable { cursor: pointer; }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  background: var(--card-2);
  color: var(--text-dim);
  white-space: nowrap;
}
.badge-green { background: rgba(34,197,94,0.15); color: #86efac; }
.badge-red { background: rgba(239,68,68,0.15); color: #fca5a5; }
.badge-amber { background: rgba(245,158,11,0.15); color: #fcd34d; }
.badge-blue { background: rgba(79,124,255,0.15); color: #93b4ff; }
.badge-purple { background: rgba(167,139,250,0.15); color: #c4b5fd; }

/* ---------- Forms ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 12px; font-weight: 600; color: var(--text-dim); }
.field input, .field select, .field textarea {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 9px;
  padding: 10px 12px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 64px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* ---------- Search / toolbar ---------- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.toolbar input, .toolbar select {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 9px;
  padding: 9px 13px;
  font-size: 13px;
  outline: none;
  min-width: 180px;
}
.toolbar input:focus, .toolbar select:focus { border-color: var(--accent); }
.toolbar .spacer { flex: 1; }

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 18, 0.72);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  z-index: 100;
  padding: 20px;
}
.modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
  animation: pop 0.18s ease;
}
.modal-sm { max-width: 420px; }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px 0;
}
.modal-header h3 { font-size: 16px; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 8px;
}
.modal-close:hover { background: var(--card-2); color: var(--text); }
.modal-body { padding: 18px 22px 22px; }
.modal-note { color: var(--text-faint); font-size: 12px; margin-bottom: 14px; }

@keyframes pop { from { transform: scale(0.96); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ---------- Toasts ---------- */
#toast-root {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 200;
}
.toast {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  color: var(--text);
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 13px;
  box-shadow: var(--shadow);
  max-width: 360px;
  animation: slideIn 0.2s ease;
}
.toast-success { border-left-color: var(--green); }
.toast-error { border-left-color: var(--red); }
.toast-warn { border-left-color: var(--amber); }
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------- Misc ---------- */
.view { display: none; }
.view.active { display: block; }

.empty-state {
  text-align: center;
  padding: 46px 20px;
  color: var(--text-faint);
}
.empty-state .big { font-size: 40px; margin-bottom: 10px; }
.empty-state p { font-size: 13px; }

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 40px;
  color: var(--text-dim);
}
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.money { font-weight: 650; font-variant-numeric: tabular-nums; }
.money.pos { color: #86efac; }
.money.neg { color: #fca5a5; }

.avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  display: inline-grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.name-cell { display: flex; align-items: center; gap: 10px; }
.name-cell .nm { font-weight: 600; }
.name-cell .sub { color: var(--text-faint); font-size: 11px; }

.actions-cell { display: flex; gap: 6px; justify-content: flex-end; }

.section-title { font-size: 13px; font-weight: 650; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; margin: 22px 0 12px; }

/* Progress bar */
.progress { height: 6px; background: var(--card-2); border-radius: 999px; overflow: hidden; min-width: 70px; }
.progress > div { height: 100%; border-radius: 999px; background: var(--green); }

/* Report summary strip */
.summary-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 14px; margin-bottom: 18px; }
.summary-item { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.summary-item .lbl { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.04em; }
.summary-item .val { font-size: 20px; font-weight: 700; margin-top: 4px; }

/* Settings layout */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 1000px) { .settings-grid { grid-template-columns: 1fr; } }

/* Tabs */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tab-btn {
  background: none;
  border: none;
  padding: 10px 16px;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab-btn.active { color: #fff; border-bottom-color: var(--accent); }

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 14px 4px 4px;
}
.page-info { color: var(--text-faint); font-size: 12px; }

/* ---------- Classes grid ---------- */
.classes-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.class-card { display: flex; flex-direction: column; gap: 12px; }
.class-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.class-name { font-size: 16px; font-weight: 700; }
.class-level { color: var(--text-dim); font-size: 12px; margin-top: 2px; }
.class-fee { font-size: 20px; font-weight: 750; }
.class-fee span { color: var(--text-faint); font-size: 12px; font-weight: 500; }
.class-stats { display: flex; gap: 14px; color: var(--text-dim); font-size: 12px; }
.class-stats b { color: var(--text); }
.class-collected { display: flex; flex-direction: column; gap: 6px; font-size: 12px; color: var(--text-dim); }
.class-collected b { color: var(--text); }
.class-report { display: flex; justify-content: flex-end; }

/* ---------- Detail grid (student view) ---------- */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
@media (max-width: 700px) { .detail-grid { grid-template-columns: 1fr; } }
.detail-row { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px dashed var(--border); }
.detail-row:last-child { border-bottom: none; }
.detail-label { color: var(--text-dim); font-size: 12px; white-space: nowrap; }
.detail-value { font-weight: 600; text-align: right; word-break: break-word; }

/* ---------- Payment templates ---------- */
.template-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.template-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 10px 14px;
}
.template-info { display: flex; flex-direction: column; gap: 2px; }
.template-name { font-weight: 600; font-size: 13px; }
.template-sub { color: var(--text-faint); font-size: 12px; }
.empty-note { color: var(--text-faint); font-size: 13px; padding: 8px 0; }

/* ---------- Reports ---------- */
.report-result { margin-top: 6px; }
.download-row { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.download-row .btn { border-color: var(--accent); color: var(--accent-2); }
.download-row .btn:hover { background: rgba(79,124,255,0.12); }

/* ---------- Toolbar field alignment ---------- */
.toolbar .field { margin-bottom: 0; }
.toolbar .field label { display: none; }
.toolbar .field input, .toolbar .field select { min-width: 150px; }

/* Activity feed */
.activity-list { display: flex; flex-direction: column; }
.activity-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.activity-item:last-child { border-bottom: none; }
.activity-item .ic { font-size: 16px; margin-top: 2px; }
.activity-item .desc { font-size: 13px; }
.activity-item .when { color: var(--text-faint); font-size: 11px; margin-top: 2px; }