:root {
  --bg: #140d0d;
  --surface: #201616;
  --surface-2: #301e1e;
  --surface-3: #3d2525;
  --border: rgba(255,255,255,0.07);
  --border-strong: rgba(255,255,255,0.13);

  --text: #f2e8e8;
  --text-muted: #997a7a;
  --text-dim: #684a4a;

  --accent: #f05b5b;
  --accent-glow: rgba(240, 91, 91, 0.25);
  --accent-2: #fa8ba3;

  --paid-color: #4ade80;
  --paid-bg: rgba(34,197,94,0.1);
  --paid-border: rgba(34,197,94,0.3);
  --paid-text: #4ade80;

  --overdue-bg: rgba(239,68,68,0.1);
  --overdue-border: rgba(239,68,68,0.3);
  --overdue-text: #f87171;

  --due-soon-bg: rgba(251,146,60,0.1);
  --due-soon-border: rgba(251,146,60,0.35);
  --due-soon-text: #fb923c;

  --radius-sm: 8px;
  --radius: 14px;

  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --font-display: 'Playfair Display', serif;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.app { 
  max-width: 780px; 
  margin: 0 auto; 
  padding: 0 16px 80px; 
}

/* ── Header ── */
.app-header { 
  padding: 28px 0 20px; 
  border-bottom: 1px solid var(--border); 
  margin-bottom: 28px; 
}

.header-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  gap: 16px; 
  flex-wrap: wrap; 
}

.header-title { 
  display: flex; 
  align-items: center; 
  gap: 14px; 
}

.header-icon { 
  font-size: 28px; 
  color: var(--accent); 
  line-height: 1; 
  filter: drop-shadow(0 0 10px var(--accent-glow)); 
}

h1 { 
  font-family: var(--font-display); 
  font-size: 1.75rem; 
  font-weight: 700; 
  letter-spacing: -0.02em; 
  color: var(--text); 
}

.header-sub { 
  font-size: 0.78rem; 
  color: var(--text-muted); 
  margin-top: 2px; 
  letter-spacing: 0.05em; 
  text-transform: uppercase; 
}

.header-actions { 
  display: flex; 
  gap: 8px; 
  flex-wrap: wrap; 
}

/* ── Buttons ── */
.btn {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 9px 18px;
  transition: all 0.18s ease;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
  width: 100%;
  padding: 12px;
  font-size: 0.95rem;
  margin-top: 4px;
}

.btn-primary:hover { 
  background: #f57a7a; 
  box-shadow: 0 4px 20px rgba(240, 91, 91, 0.4); 
  transform: translateY(-1px); 
}

.btn-ghost { 
  background: var(--surface-2); 
  color: var(--text-muted); 
  border: 1px solid var(--border); 
}

.btn-ghost:hover { 
  background: var(--surface-3); 
  color: var(--text); 
  border-color: var(--border-strong); 
}

.btn-sm { 
  padding: 5px 12px; 
  font-size: 0.78rem; 
  border-radius: 6px; 
}

.btn-danger { 
  background: rgba(239,68,68,0.12); 
  color: var(--overdue-text); 
  border: 1px solid var(--overdue-border); 
}
.btn-danger:hover { 
  background: rgba(239,68,68,0.22); 
}

.btn-neutral { 
  background: var(--surface-3); 
  color: var(--text-muted); 
  border: 1px solid var(--border); 
}

.btn-neutral:hover { 
  color: var(--text); 
}

.btn-paid { 
  background: var(--paid-bg); 
  color: var(--paid-text); 
  border: 1px solid var(--paid-border); 
}

.btn-paid:hover { 
  background: rgba(34,197,94,0.18); 
}

.btn:disabled { 
  opacity: 0.4; 
  cursor: not-allowed; 
  transform: none !important; 
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--surface-3);
  color: var(--text);
  padding: 10px 22px;
  border-radius: 99px;
  font-size: 0.875rem;
  border: 1px solid var(--border-strong);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s, transform 0.22s;
  z-index: 9999;
  white-space: nowrap;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
}

.toast.visible { 
  opacity: 1; 
  transform: translateX(-50%) translateY(0); 
}

.toast.toast-error { 
  border-color: var(--overdue-border); 
  color: var(--overdue-text); 
}

.toast.toast-neutral { 
  color: var(--text-muted); 
}

/* ── Totals Strip ── */
.totals-strip { 
  display: flex; 
  align-items: stretch; 
  background: var(--surface); 
  border: 1px solid var(--border); 
  border-radius: var(--radius); 
  overflow: hidden; 
  margin-bottom: 16px; 
}

.total-card   { 
  flex: 1; 
  display: flex; 
  flex-direction: column; 
  align-items: center; 
  justify-content: center; 
  padding: 20px 16px; 
  gap: 3px; 
}

.total-divider{ 
  width: 1px; 
  background: var(--border); 
  margin: 16px 0; 
}

.total-label  { 
  font-size: 0.72rem; 
  color: var(--text-muted); 
  text-transform: uppercase; 
  letter-spacing: 0.08em; 
}

.total-amount { 
  font-family: var(--font-mono); 
  font-size: 1.55rem; 
  font-weight: 500; 
  color: var(--accent); 
}

.total-sub { 
  font-size: 0.72rem; 
  color: var(--text-dim); 
  font-family: var(--font-mono); 
}

/* ── Progress ── */
.progress-section { 
  background: var(--surface); 
  border: 1px solid var(--border);
  border-radius: var(--radius); 
  padding: 16px 20px; 
  margin-bottom: 24px; 
}

.progress-header { 
  display: flex; 
  justify-content: space-between; 
  margin-bottom: 10px; 
}

.progress-label { 
  font-size: 0.82rem; 
  color: var(--text-muted); 
}

.progress-pct { 
  font-family: var(--font-mono); 
  font-size: 0.82rem; 
  color: var(--accent); 
  font-weight: 500; 
}

.progress-track { 
  height: 6px; 
  background: var(--surface-3); 
  border-radius: 99px; 
  overflow: hidden; 
}

.progress-bar { 
  height: 100%; 
  border-radius: 99px; 
  background: var(--accent); 
  transition: width 0.5s cubic-bezier(0.4,0,0.2,1), background 0.4s; 
  width: 0%; 
}

/* ── Add Form ── */
.add-section { 
  background: var(--surface); 
  border: 1px solid var(--border); 
  border-radius: var(--radius); 
  padding: 24px; 
  margin-bottom: 28px; 
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 16px; }
.form-group  { display: flex; flex-direction: column; gap: 6px; }

.form-group label { font-size: 0.72rem; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.07em; }

input, select {
  font-family: var(--font-body);
  font-size: 0.9rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 10px 13px;
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
input::placeholder { color: var(--text-dim); }
input[type="date"]::-webkit-calendar-picker-indicator { filter: invert(0.5); cursor: pointer; }

/* ── Section title ── */
.section-title { font-size: 0.68rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-dim); margin-bottom: 14px; }

/* ── Bills Section Header ── */
.bills-section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.bills-section-header .section-title { margin-bottom: 0; }
.results-count { font-size: 0.75rem; color: var(--text-dim); font-family: var(--font-mono); }

/* ── Toolbar ── */
.toolbar { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 16px; flex-direction: column; gap: 12px; }

.search-wrap { position: relative; display: flex; align-items: center; }
.search-icon { position: absolute; left: 12px; font-size: 1.1rem; color: var(--text-dim); pointer-events: none; line-height: 1; }
.search-input { padding-left: 34px !important; padding-right: 34px !important; width: 100%; }
.search-clear { position: absolute; right: 10px; background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 0.8rem; padding: 4px 6px; border-radius: 4px; opacity: 0; transition: opacity 0.15s, color 0.15s; width: auto; }
.search-clear:hover { color: var(--text); background: none; }

.filter-row  { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.filter-label{ font-size: 0.68rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.09em; color: var(--text-dim); min-width: 44px; flex-shrink: 0; }
.chip-group  { display: flex; flex-wrap: wrap; gap: 5px; }

.chip {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  width: auto;
}
.chip:hover  { border-color: var(--border-strong); color: var(--text); background: var(--surface-3); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; box-shadow: 0 1px 8px var(--accent-glow); }

/* ── Bills List ── */
.bill-list { display: flex; flex-direction: column; gap: 10px; }

/* ── Bill Card ── */
.bill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color 0.2s, transform 0.15s;
  animation: slideIn 0.25s ease both;
}
.bill-card:hover   { border-color: var(--border-strong); transform: translateY(-1px); }
.bill-card.paid    { background: var(--paid-bg);      border-color: var(--paid-border);     opacity: 0.8; }
.bill-card.overdue { background: var(--overdue-bg);   border-color: var(--overdue-border); }
.bill-card.due-soon{ background: var(--due-soon-bg);  border-color: var(--due-soon-border); }

@keyframes slideIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.bill-top    { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 10px; gap: 12px; }
.bill-name   { font-size: 1rem; font-weight: 600; color: var(--text); }
.bill-amount { font-family: var(--font-mono); font-size: 1.05rem; font-weight: 500; color: var(--text); white-space: nowrap; }

mark { background: rgba(240, 91, 91, 0.3); color: var(--text); border-radius: 3px; padding: 0 2px; }

.bill-meta      { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 13px; }
.bill-meta-item { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; }
.bill-meta-item .label { color: var(--text-dim); }

.badge         { display: inline-flex; align-items: center; padding: 2px 9px; border-radius: 99px; font-size: 0.7rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.badge-paid     { background: var(--paid-bg);      color: var(--paid-text);      border: 1px solid var(--paid-border); }
.badge-unpaid   { background: var(--surface-3);    color: var(--text-muted);     border: 1px solid var(--border); }
.badge-overdue  { background: var(--overdue-bg);   color: var(--overdue-text);   border: 1px solid var(--overdue-border); }
.badge-due-soon { background: var(--due-soon-bg);  color: var(--due-soon-text);  border: 1px solid var(--due-soon-border); }

.bill-shares   { display: flex; gap: 10px; margin-bottom: 14px; padding: 10px 14px; background: rgba(255,255,255,0.03); border-radius: var(--radius-sm); border: 1px solid var(--border); }
.share-item    { flex: 1; text-align: center; }
.share-who     { display: block; font-size: 0.68rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 2px; }
.share-amt     { font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-muted); }
.share-divider { width: 1px; background: var(--border); margin: 0; }

.bill-actions  { display: flex; gap: 7px; flex-wrap: wrap; }

/* ── Empty State ── */
.empty-state { display: none; flex-direction: column; align-items: center; gap: 10px; padding: 48px 0; color: var(--text-dim); }
.empty-state.visible { display: flex; }
.empty-icon { font-size: 2rem; }
.empty-state p { font-size: 0.9rem; }

/* ── Modals (shared base) ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 64px rgba(0,0,0,0.65);
  transform: translateY(16px) scale(0.98);
  transition: transform 0.22s cubic-bezier(0.34,1.56,0.64,1), opacity 0.2s;
  opacity: 0;
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); opacity: 1; }

/* History modal can be wider and taller */
#historyModal .modal { max-width: 600px; max-height: 80vh; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-title { font-family: var(--font-display); font-size: 1.2rem; color: var(--text); }

/* ── Edit Modal specifics ── */
.modal-body {
  padding: 24px;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-footer .btn-ghost {
  flex: 0 0 auto;
}

.modal-save-btn {
  flex: 1;
  margin-top: 0; /* override .btn-primary default */
}

/* ── History Modal specifics ── */
.history-content { overflow-y: auto; padding: 20px 24px; display: flex; flex-direction: column; gap: 24px; }
.history-empty   { text-align: center; color: var(--text-dim); font-size: 0.875rem; padding: 32px 0; }
.history-entry   { display: flex; flex-direction: column; gap: 6px; }

.history-entry-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.history-entry-header strong { color: var(--text); font-size: 0.95rem; }
.hist-summary { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-mono); }

.hist-bill { display: grid; grid-template-columns: 1fr auto auto auto; gap: 10px; align-items: center; font-size: 0.8rem; padding: 6px 0; border-bottom: 1px solid rgba(255,255,255,0.04); }
.hist-name   { color: var(--text); }
.hist-meta   { color: var(--text-dim); font-size: 0.75rem; }
.hist-status { font-size: 0.72rem; color: var(--text-muted); }
.hist-amt    { font-family: var(--font-mono); color: var(--text-muted); }
.hist-paid   .hist-status { color: var(--paid-text); }
.hist-overdue .hist-status { color: var(--overdue-text); }

/* ── Responsive ── */
@media (max-width: 540px) {
  .form-grid    { grid-template-columns: 1fr; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .total-amount { font-size: 1.3rem; }
  .hist-bill    { grid-template-columns: 1fr auto auto; }
  .hist-meta    { display: none; }
  .filter-row   { flex-direction: column; align-items: flex-start; }
  .modal-footer { flex-direction: column-reverse; }
  .modal-save-btn { width: 100%; }
}

/* ── Print ── */
@media print {
  @page { margin: 16mm; }
  body { background: white; color: black; font-family: 'DM Sans', sans-serif; }

  .app-header .header-actions,
  .add-section, .section-title, .bill-actions,
  .progress-section, .toolbar, .bills-section-header,
  .modal-overlay, .toast { display: none !important; }

  .app { max-width: 100%; padding: 0; }
  h1 { color: black; font-size: 1.5rem; }
  .header-sub { color: #666; }
  .header-icon { display: none; }

  .totals-strip  { border: 1px solid #ccc; border-radius: 8px; margin-bottom: 20px; break-inside: avoid; }
  .total-amount  { color: #2e1a1a; }
  .total-sub     { color: #888; }
  .total-divider { background: #ccc; }

  .bill-card { background: white !important; border: 1px solid #ddd !important; border-radius: 6px; margin-bottom: 8px; break-inside: avoid; animation: none; }
  .bill-card.paid    { border-color: #86efac !important; }
  .bill-card.overdue { border-color: #fca5a5 !important; }

  .bill-name, .bill-amount { color: black; }
  .bill-meta-item { color: #444; }
  .badge-paid    { color: #166534; border-color: #86efac; background: #f0fdf4; }
  .badge-overdue { color: #991b1b; border-color: #fca5a5; background: #fef2f2; }
  .badge-due-soon{ color: #9a3412; border-color: #fdba74; background: #fff7ed; }
  .badge-unpaid  { color: #555;    border-color: #ccc;    background: #f9f9f9; }
  .bill-shares   { border-color: #eee; background: #fafafa; }
  .share-who     { color: #888; }
  .share-amt     { color: #333; }
  mark { background: none; }
}