/* ── Reset & Variables ─────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0b0d14;
  --surface: #12151f;
  --surface-2: #1a1e2e;
  --surface-3: #222840;
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.14);
  --accent: #7c6ff7;
  --accent-glow: rgba(124, 111, 247, 0.25);
  --income: #22d49a;
  --income-bg: rgba(34, 212, 154, 0.1);
  --expense: #f25f71;
  --expense-bg: rgba(242, 95, 113, 0.1);
  --text-1: #f0f2ff;
  --text-2: #9099b8;
  --text-3: #5a6182;
  --radius: 16px;
  --radius-sm: 10px;
  --font-display: "Plus Jakarta Sans", sans-serif;
  --font-body: "Geist", sans-serif;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light mode */
body.light {
  --bg: #f2f3f9;
  --surface: #ffffff;
  --surface-2: #f7f8fd;
  --surface-3: #edeef7;
  --border: rgba(0, 0, 0, 0.07);
  --border-hover: rgba(0, 0, 0, 0.13);
  --text-1: #111827;
  --text-2: #4b5370;
  --text-3: #9099b8;
  --accent-glow: rgba(124, 111, 247, 0.15);
}

/* ── Base ──────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  font-family: var(--font-body);
  color: var(--text-1);
  min-height: 100vh;
  padding: 2rem 1rem 4rem;
  transition:
    background var(--transition),
    color var(--transition);
  position: relative;
  overflow-x: hidden;
}

/* subtle grid bg */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ── Layout ─────────────────────────────────────────── */
.wrapper {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ── Card ────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition:
    background var(--transition),
    border-color var(--transition);
}

/* ── Header ──────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  background: none;
  border: none;
}

.header-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  flex-shrink: 0;
}

.header h1 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-1);
}

.header-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.icon-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 1rem;
  color: var(--text-2);
  transition: all var(--transition);
}
.icon-btn:hover {
  background: var(--surface-3);
  border-color: var(--border-hover);
  color: var(--text-1);
  transform: translateY(-2px);
}

/* ── Balance Card ────────────────────────────────────── */
.balance-card {
  background: linear-gradient(135deg, var(--surface-2), var(--surface-3));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 2rem 1.75rem;
  position: relative;
  overflow: hidden;
}

.balance-card::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--accent-glow);
  filter: blur(40px);
  pointer-events: none;
}

.balance-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.5rem;
}

.balance-amount {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 2.75rem);
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 1.5rem;
}

.balance-amount .currency {
  font-size: 0.55em;
  font-weight: 500;
  color: var(--text-2);
  margin-left: 0.2em;
  vertical-align: middle;
}

/* negative balance */
.balance-amount.negative {
  color: var(--expense);
}

.stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.stat-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 0.75rem;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  transition: background var(--transition);
  min-width: 0;
  overflow: hidden;
}

.stat-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.stat-icon.income {
  background: var(--income-bg);
  color: var(--income);
}
.stat-icon.expense {
  background: var(--expense-bg);
  color: var(--expense);
}

.stat-info {
  min-width: 0;
  flex: 1;
}

.stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  font-weight: 500;
}

.stat-amount {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-1);
  overflow-wrap: break-word;
  word-break: break-all;
  max-width: 100%;
  line-height: 1.2;
}

.stat-amount.income {
  color: var(--income);
}
.stat-amount.expense {
  color: var(--expense);
}

/* ── Form Card ────────────────────────────────────────── */
.form-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.form-title {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.input-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.input-group {
  flex: 1;
  min-width: 160px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

label.field-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}

input[type="text"],
input[type="number"] {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-1);
  outline: none;
  transition: all var(--transition);
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--surface);
}

input.error {
  border-color: var(--expense) !important;
  box-shadow: 0 0 0 3px var(--expense-bg) !important;
}
.error-msg {
  font-size: 0.72rem;
  color: var(--expense);
  min-height: 1em;
}

/* ── Type Toggle ─────────────────────────────────────── */
.type-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px;
}

.type-toggle input[type="radio"] {
  display: none;
}

.type-toggle label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  border-radius: 7px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-3);
  transition: all var(--transition);
  user-select: none;
}

.type-toggle input#income:checked + label {
  background: var(--income-bg);
  color: var(--income);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.type-toggle input#expense:checked + label {
  background: var(--expense-bg);
  color: var(--expense);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

/* ── Submit Button ───────────────────────────────────── */
#add-btn {
  width: 100%;
  padding: 0.8rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

#add-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background var(--transition);
}

#add-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

#add-btn:hover::after {
  background: rgba(255, 255, 255, 0.08);
}
#add-btn:active {
  transform: translateY(0);
}

#add-btn.editing {
  background: var(--income);
  box-shadow: none;
}

#add-btn.editing:hover {
  box-shadow: 0 6px 20px rgba(34, 212, 154, 0.25);
}

/* ── Transaction List ────────────────────────────────── */
.tx-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.tx-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.export-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.export-btn:hover {
  background: var(--surface-3);
  border-color: var(--accent);
  color: var(--accent);
}

.export-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.tx-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-1);
}

.tx-count {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 10px;
}

#transactionHistory {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-3);
}

.empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.4;
}

.empty-state p {
  font-size: 0.9rem;
  line-height: 1.5;
}

.tx-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tx-item:hover {
  border-color: var(--border-hover);
  background: var(--surface-3);
}

.tx-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.tx-item.income .tx-dot {
  background: var(--income);
  box-shadow: 0 0 6px var(--income);
}
.tx-item.expense .tx-dot {
  background: var(--expense);
  box-shadow: 0 0 6px var(--expense);
}

.tx-info {
  flex: 1;
  min-width: 0;
}

.tx-desc {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-transform: capitalize;
}

.tx-date {
  font-size: 0.7rem;
  color: var(--text-3);
  margin-top: 1px;
}

.tx-amount {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  flex-shrink: 0;
}

.tx-item.income .tx-amount {
  color: var(--income);
}
.tx-item.expense .tx-amount {
  color: var(--expense);
}

.tx-actions {
  display: flex;
  gap: 0.35rem;
  flex-shrink: 0;
}

.tx-btn {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 0.72rem;
  color: var(--text-3);
  transition: all var(--transition);
}

.tx-btn.delete:hover {
  background: var(--expense-bg);
  border-color: var(--expense);
  color: var(--expense);
}
.tx-btn.edit:hover {
  background: rgba(124, 111, 247, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Toast ───────────────────────────────────────────── */
.toast {
  position: fixed;
  top: 1.25rem;
  left: 50%;
  transform: translateX(-50%) translateY(-120px);
  z-index: 1000;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-1);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  white-space: nowrap;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}
.toast.success {
  border-color: var(--income);
}
.toast.danger {
  border-color: var(--expense);
}
.toast.warning {
  border-color: #f5a623;
}

.toast-icon {
  font-size: 0.85rem;
}
.toast.success .toast-icon {
  color: var(--income);
}
.toast.danger .toast-icon {
  color: var(--expense);
}
.toast.warning .toast-icon {
  color: #f5a623;
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 480px) {
  body {
    padding: 1rem 0.75rem 3rem;
  }

  /* Balance card tighter padding */
  .balance-card {
    padding: 1.5rem 1.25rem 1.25rem;
  }
  .balance-amount {
    font-size: 1.75rem;
  }

  /* Stats: stack vertically on very small, or shrink font */
  .stats-row {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }
  .stat-item {
    padding: 0.65rem 0.6rem;
    gap: 0.5rem;
  }
  .stat-icon {
    width: 26px;
    height: 26px;
    font-size: 0.75rem;
    flex-shrink: 0;
  }
  .stat-amount {
    font-size: 0.82rem;
  }
  .stat-label {
    font-size: 0.62rem;
  }

  /* Form */
  .input-row {
    flex-direction: column;
  }
  .input-group {
    min-width: 100% !important;
    flex: 1 1 100% !important;
  }
  .form-card {
    gap: 0.75rem;
  }

  /* Transactions */
  .tx-item {
    gap: 0.5rem;
    padding: 0.75rem 0.65rem;
  }
  .tx-amount {
    font-size: 0.82rem;
  }
  .tx-desc {
    font-size: 0.82rem;
  }
}

@media (max-width: 360px) {
  .stats-row {
    grid-template-columns: 1fr;
  }
  .balance-amount {
    font-size: 1.5rem;
  }
  .stat-amount {
    font-size: 0.78rem;
  }
}

/* ── Confirm Modal ───────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-backdrop.show {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transform: scale(0.93) translateY(8px);
  transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}

.modal-backdrop.show .modal {
  transform: scale(1) translateY(0);
}

.modal-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--expense-bg);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  color: var(--expense);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 0.2rem;
}

.modal-desc {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.5;
}

.modal-tx-preview {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.modal-tx-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-1);
  text-transform: capitalize;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.modal-tx-amount {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  flex-shrink: 0;
}

.modal-tx-amount.income {
  color: var(--income);
}
.modal-tx-amount.expense {
  color: var(--expense);
}

.modal-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.modal-btn {
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.modal-btn.cancel {
  background: var(--surface-2);
  color: var(--text-2);
}

.modal-btn.cancel:hover {
  background: var(--surface-3);
  color: var(--text-1);
  border-color: var(--border-hover);
}

.modal-btn.confirm-delete {
  background: var(--expense);
  color: #fff;
  border-color: var(--expense);
}

.modal-btn.confirm-delete:hover {
  background: #d94d5e;
  box-shadow: 0 4px 14px rgba(242, 95, 113, 0.35);
}