:root {
  --teal-900: #191512;
  --teal-700: #2c2620;
  --teal-600: #c9a227;
  --teal-500: #d9b54c;
  --teal-100: #f6ecc9;
  --gold: #eab308;
  --red: #e11d48;
  --green: #16a34a;
  --bg: #f6f5f1;
  --card: #ffffff;
  --text: #201c16;
  --muted: #77705f;
  --border: #ece6d8;
  --radius: 16px;
  --shadow: 0 4px 18px rgba(32, 28, 22, 0.08);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14120e;
    --card: #1e1b16;
    --text: #f3efe3;
    --muted: #a89e88;
    --border: #302b22;
    --shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
    --teal-100: #3a3020;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Tajawal", "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  padding-bottom: calc(24px + var(--safe-bottom));
  min-height: 100vh;
}

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 14px;
}

/* Header */
header.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(135deg, var(--teal-700), var(--teal-900));
  color: #fff;
  padding: calc(14px + var(--safe-top)) 16px 16px;
  border-radius: 0 0 22px 22px;
  box-shadow: var(--shadow);
}

.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.topbar-row h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 800;
}
.topbar-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}
.topbar-logo {
  height: 38px;
  width: auto;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.35));
}
.topbar-caption {
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  opacity: 0.9;
  letter-spacing: 0.3px;
}

.icon-btn {
  background: rgba(255,255,255,0.14);
  border: none;
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease;
}
.icon-btn:active { transform: scale(0.9); background: rgba(255,255,255,0.28); }
.icon-btn.muted { opacity: 0.55; }
.icon-btn.spinning svg { animation: spin .7s linear; }
@keyframes spin { to { transform: rotate(360deg); } }

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

.month-switch {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.12);
  border-radius: 14px;
  padding: 6px 10px;
}
.month-switch button {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 18px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  border-radius: 8px;
}
.month-switch button:active { background: rgba(255,255,255,0.2); }
.month-label { font-weight: 700; font-size: 15px; }

/* Summary cards */
.summary-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
  border: 1px solid var(--border);
}
.stat-card .label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}
.stat-card .value {
  font-size: 20px;
  font-weight: 800;
  margin-top: 6px;
  text-align: right;
  unicode-bidi: plaintext;
}
.stat-card.income .value { color: var(--teal-600); }
.stat-card.spent .value { color: var(--red); }
.stat-card.remaining .value { }
.stat-card.remaining .value.negative { color: var(--red); }
.stat-card.remaining .value.positive { color: var(--green); }
.stat-card.diff .value.up { color: var(--red); }
.stat-card.diff .value.down { color: var(--green); }
.diff-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }

/* Surplus banner */
.surplus-banner {
  margin-top: 10px;
  background: linear-gradient(135deg, var(--teal-600), var(--teal-700));
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.surplus-banner .label { font-size: 12px; font-weight: 700; opacity: 0.92; }
.surplus-banner .value { font-size: 20px; font-weight: 800; unicode-bidi: plaintext; white-space: nowrap; }
.surplus-banner .value.negative { color: #ffd7d7; }

/* Sections */
section.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  margin-top: 16px;
  overflow: hidden;
}
.card-header {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}
.card-header h2 {
  font-size: 15px;
  margin: 0;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}
.chevron { transition: transform .2s ease; color: var(--muted); }
.card.collapsed .chevron { transform: rotate(-90deg); }
.card.collapsed .card-body { display: none; }
.card-body { padding: 0 16px 16px; }

/* Form fields */
.field { margin-bottom: 12px; }
.field label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 600;
}
.field input, .field select {
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--teal-500);
  box-shadow: 0 0 0 3px var(--teal-100);
}
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.primary-btn {
  width: 100%;
  padding: 13px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--teal-600), var(--teal-700));
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: opacity .15s ease, transform .1s ease;
}
.primary-btn:active { transform: scale(0.98); }
.primary-btn:disabled { opacity: .5; cursor: default; }

.ghost-btn {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: 1.5px dashed var(--teal-500);
  background: transparent;
  color: var(--teal-600);
  font-weight: 700;
  cursor: pointer;
  margin-top: 6px;
}

/* Sub-panel (grouped section inside a card) */
.sub-panel {
  margin-top: 18px;
  padding: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.sub-panel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 10px;
}
.sub-panel .expense-item { padding: 8px 0; }
.sub-panel .row-2 { margin-top: 4px; }

/* Expenses list */
.expense-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  gap: 10px;
}
.expense-item:last-child { border-bottom: none; }
.expense-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--teal-100);
  color: var(--teal-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.expense-info { flex: 1; min-width: 0; }
.expense-info .name { font-weight: 700; font-size: 14px; }
.expense-info .meta { font-size: 12px; color: var(--muted); margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.expense-amount { font-weight: 800; color: var(--red); font-size: 14px; white-space: nowrap; unicode-bidi: plaintext; }
.delete-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 16px;
  cursor: pointer;
  padding: 6px;
}
.delete-btn:active { color: var(--red); }

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 22px 8px;
  font-size: 14px;
}

/* Category breakdown bars */
.bar-row { margin-bottom: 10px; }
.bar-row .top { display: flex; justify-content: space-between; font-size: 12px; margin-bottom: 4px; }
.bar-track { height: 8px; border-radius: 6px; background: var(--border); overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--teal-500), var(--teal-700)); border-radius: 6px; }

/* Toast */
#toast {
  position: fixed;
  bottom: calc(18px + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--teal-900);
  color: #fff;
  padding: 12px 20px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
  z-index: 100;
  max-width: 90%;
  text-align: center;
  box-shadow: var(--shadow);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Install banner */
#install-banner {
  display: none;
  margin-top: 16px;
  background: linear-gradient(135deg, var(--gold), #f59e0b);
  color: #402c00;
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
#install-banner.show { display: block; }
#install-banner p { margin: 0 0 10px; font-size: 13px; font-weight: 700; }
#install-banner .actions { display: flex; gap: 8px; }
#install-banner button {
  flex: 1;
  padding: 9px;
  border-radius: 10px;
  border: none;
  font-weight: 800;
  font-size: 13px;
  cursor: pointer;
}
#install-banner .do-install { background: #402c00; color: #fff; }
#install-banner .dismiss { background: rgba(64,44,0,0.12); color: #402c00; }

footer.hint {
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  margin-top: 24px;
  padding: 0 20px;
  line-height: 1.8;
}

@media (min-width: 600px) {
  .app { padding: 0 24px; }
}