/* ═══════════════════════════════════════════════════════════════════════
   Components — cards, tables, badges, toasts, modals, empty states
   ═══════════════════════════════════════════════════════════════════════ */

/* ─── Cards ──────────────────────────────────────────────────────────── */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border);
}

.card-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: var(--radius);
  background: var(--primary-soft);
  color: var(--primary-text);
  flex-shrink: 0;
}

.card-icon svg { width: 16px; height: 16px; }
.card-body { padding: var(--space-5); }
.card-body.is-flush { padding: 0; }

.card-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--primary);
}

/* ─── Stat cards (coloured top border, as in the reference) ──────────── */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-4);
}

.stat-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
  overflow: hidden;
  transition: transform var(--normal) var(--ease-out),
              box-shadow var(--normal) var(--ease-out);
}

.stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--stat-colour, var(--primary));
}

.stat-card.is-clickable { cursor: pointer; }
.stat-card.is-clickable:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.stat-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.stat-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.stat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: var(--radius);
  background: var(--stat-soft, var(--primary-soft));
  color: var(--stat-colour, var(--primary));
  flex-shrink: 0;
}

.stat-icon svg { width: 17px; height: 17px; }

.stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
}

.stat-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ─── Badges & status pills ──────────────────────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.125rem 0.5rem;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge svg { width: 12px; height: 12px; }

.badge-neutral { background: var(--neutral-soft); color: var(--neutral-text); }
.badge-primary { background: var(--primary-soft); color: var(--primary-text); }
.badge-success { background: var(--success-soft); color: var(--success-text); }
.badge-warning { background: var(--warning-soft); color: var(--warning-text); }
.badge-danger  { background: var(--danger-soft);  color: var(--danger-text); }
.badge-info    { background: var(--info-soft);    color: var(--info-text); }
.badge-violet  { background: var(--violet-soft);  color: var(--violet-text); }

/* A badge you can take off — used for sections on Settings → Classes. */
.badge-remove {
  border: 0;
  background: none;
  color: inherit;
  opacity: 0.55;
  cursor: pointer;
  font-size: 1.1em;
  line-height: 1;
  padding: 0 0 0 2px;
  margin-left: 2px;
}

.badge-remove:hover { opacity: 1; color: var(--danger); }

.badge-remove:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
  border-radius: 2px;
  opacity: 1;
}

/* Status vocabulary — identical everywhere in the app */
.status-paid     { background: var(--success-soft); color: var(--success-text); }
.status-partial  { background: var(--warning-soft); color: var(--warning-text); }
.status-overdue  { background: var(--danger-soft);  color: var(--danger-text); }
.status-unpaid   { background: var(--neutral-soft); color: var(--neutral-text); }
.status-advance  { background: var(--violet-soft);  color: var(--violet-text); }
.status-free     { background: var(--neutral-soft); color: var(--neutral-text); }

/* ─── Tables ─────────────────────────────────────────────────────────── */

.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--text-base);
}

.table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: var(--space-3) var(--space-4);
  background: var(--surface-soft);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

.table thead th.num { text-align: right; }

.table tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.table tbody tr { transition: background-color var(--fast) var(--ease); }
.table tbody tr:hover { background: var(--surface-hover); }
.table tbody tr:last-child td { border-bottom: none; }

.table tfoot td {
  padding: var(--space-3) var(--space-4);
  background: var(--surface-soft);
  font-weight: var(--weight-semibold);
  border-top: 2px solid var(--border-strong);
}

.table.is-compact tbody td,
.table.is-compact thead th { padding: var(--space-2) var(--space-3); }

.table.is-striped tbody tr:nth-child(even) { background: var(--surface-soft); }
.table.is-striped tbody tr:nth-child(even):hover { background: var(--surface-hover); }

/* Row flash after marking a fee paid */
@keyframes row-paid {
  0%   { background: var(--success-soft); }
  100% { background: transparent; }
}
.table tbody tr.just-paid { animation: row-paid 1.4s var(--ease-out); }

/* ─── Progress ───────────────────────────────────────────────────────── */

.progress {
  height: 6px;
  background: var(--surface-soft);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--progress-colour, var(--primary));
  border-radius: var(--radius-full);
  transition: width var(--slow) var(--ease-out);
}

/* ─── Empty state ────────────────────────────────────────────────────── */

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
  gap: var(--space-3);
}

.empty-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  background: var(--surface-soft);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.empty-icon svg { width: 22px; height: 22px; }
.empty-title { font-size: var(--text-md); font-weight: var(--weight-semibold); }
.empty-text { font-size: var(--text-base); color: var(--text-muted); max-width: 42ch; }

/* ─── Skeleton loaders — shaped like the content they replace ────────── */

@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface-soft) 0%,
    #E9EEF4 50%,
    var(--surface-soft) 100%
  );
  background-size: 800px 100%;
  animation: shimmer 1.4s linear infinite;
  border-radius: var(--radius-sm);
  height: 1em;
}

/* ─── Toasts ─────────────────────────────────────────────────────────── */

.toast-region {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: var(--z-toast);
  pointer-events: none;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 300px;
  max-width: 440px;
  padding: var(--space-3) var(--space-4);
  background: var(--sidebar-bg);
  color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-base);
  pointer-events: auto;
  animation: toast-in var(--normal) var(--ease-out);
}

.toast.is-leaving { opacity: 0; transform: translateY(8px); transition: all var(--normal) var(--ease); }

.toast-icon {
  display: flex;
  flex-shrink: 0;
  width: 18px; height: 18px;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error   .toast-icon { color: var(--danger); }
.toast-info    .toast-icon { color: var(--info); }

.toast-message { flex: 1; min-width: 0; }

.toast-action {
  flex-shrink: 0;
  padding: 0.25rem 0.625rem;
  background: rgb(255 255 255 / 0.12);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background-color var(--fast) var(--ease);
}

.toast-action:hover { background: rgb(255 255 255 / 0.22); }

.toast-close {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--sidebar-text-muted);
  cursor: pointer;
  padding: 0.125rem;
  line-height: 0;
}

.toast-close:hover { color: #fff; }

@media (max-width: 767px) {
  .toast-region {
    left: var(--space-3);
    right: var(--space-3);
    bottom: 4.5rem;
  }
  .toast { min-width: 0; width: 100%; }
}

/* ─── Modal & slide-over ─────────────────────────────────────────────── */

.backdrop {
  position: fixed;
  inset: 0;
  background: rgb(15 23 42 / 0.45);
  backdrop-filter: blur(3px);
  z-index: var(--z-backdrop);
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: min(640px, calc(100vw - 2rem));
  max-height: calc(100vh - 4rem);
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  animation: modal-in var(--normal) var(--ease-out);
  overflow: hidden;
}

.modal-header,
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  flex-shrink: 0;
}

.modal-header { border-bottom: 1px solid var(--border); }
.modal-footer { border-top: 1px solid var(--border); background: var(--surface-soft); }
.modal-body { padding: var(--space-5); overflow-y: auto; }

@keyframes slideover-in {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

.slideover {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(460px, 100vw);
  display: flex;
  flex-direction: column;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  animation: slideover-in var(--normal) var(--ease-out);
}

.slideover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.slideover-body { flex: 1; overflow-y: auto; padding: var(--space-5); }

.slideover-footer {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border);
  background: var(--surface-soft);
  flex-shrink: 0;
}

/* ─── Flash messages ─────────────────────────────────────────────────── */

.flash {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--text-base);
  border: 1px solid transparent;
}

.flash svg { width: 18px; height: 18px; flex-shrink: 0; }
.flash-success { background: var(--success-soft); color: var(--success-text); border-color: #A7F3D0; }
.flash-error   { background: var(--danger-soft);  color: var(--danger-text);  border-color: #FECACA; }
.flash-warning { background: var(--warning-soft); color: var(--warning-text); border-color: #FDE68A; }
.flash-info    { background: var(--info-soft);    color: var(--info-text);    border-color: #BFDBFE; }

/* ─── Dashboard entrance animation ───────────────────────────────────── */

@keyframes rise-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-in {
  opacity: 0;
  animation: rise-in 480ms var(--ease-out) forwards;
}

.delay-1 { animation-delay: 60ms; }
.delay-2 { animation-delay: 120ms; }
.delay-3 { animation-delay: 180ms; }
.delay-4 { animation-delay: 240ms; }
.delay-5 { animation-delay: 320ms; }
.delay-6 { animation-delay: 400ms; }
.delay-7 { animation-delay: 480ms; }
.delay-8 { animation-delay: 560ms; }

/* ─── Grids ──────────────────────────────────────────────────────────── */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-4);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

@media (max-width: 767px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}