:root {
  --sage: #5B7F5B;
  --sage-dark: #4A6A4A;
  --sage-light: #E8F0E8;
  --sage-mid: #A8C0A8;
  --warm-white: #FFFBF7;
  --bg: #F4F2EE;
  --card: #FFFFFF;
  --text: #1C2B1C;
  --text-secondary: #5A6B5A;
  --muted: #8A9A8A;
  --border: #E2E6E0;
  --danger: #C45C5C;
  --danger-bg: #FDF0F0;
  --shadow: 0 2px 12px rgba(45, 62, 45, 0.08);
  --shadow-lg: 0 8px 28px rgba(45, 62, 45, 0.12);
  --radius: 16px;
  --radius-sm: 12px;
  --tab-h: calc(64px + env(safe-area-inset-bottom, 0px));
  --header-pad: env(safe-area-inset-top, 0px);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

body {
  min-height: 100dvh;
  padding-bottom: var(--tab-h);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  -webkit-appearance: none;
}

a { color: var(--sage); }

.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: calc(12px + var(--header-pad)) 20px 12px;
  background: rgba(244, 242, 238, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
}

.app-header h1 {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--sage-dark);
}

.app-header .subtitle {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.screen {
  display: none;
  padding: 16px 16px 24px;
  max-width: 560px;
  margin: 0 auto;
  animation: fadeIn 0.22s ease;
}

.screen.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 14px;
}

.card-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.total-hero {
  text-align: center;
  padding: 24px 16px;
  background: linear-gradient(145deg, var(--sage) 0%, var(--sage-dark) 100%);
  color: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  margin-bottom: 14px;
}

.total-hero .label {
  font-size: 0.8125rem;
  opacity: 0.85;
  font-weight: 500;
}

.total-hero .amount {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 4px 0;
  font-variant-numeric: tabular-nums;
}

.month-picker {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
}

.month-picker button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--card);
  box-shadow: var(--shadow);
  color: var(--sage);
  font-size: 1.1rem;
  display: grid;
  place-items: center;
}

.month-picker button:active { transform: scale(0.94); background: var(--sage-light); }

.month-picker .month-label {
  font-weight: 600;
  font-size: 1.05rem;
  min-width: 140px;
  text-align: center;
}

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

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--sage-light);
  color: var(--sage-dark);
  font-size: 0.8125rem;
  font-weight: 550;
}

.chip .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--sage);
  flex-shrink: 0;
}

.chip .chip-amt {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.rings {
  display: flex;
  justify-content: center;
  padding: 8px 0 4px;
}

.ring-wrap {
  position: relative;
  width: 140px;
  height: 140px;
}

.ring-wrap svg { transform: rotate(-90deg); }

.ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.ring-center .n {
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.ring-center .t {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.receipt-list { list-style: none; }

.receipt-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  -webkit-user-select: none;
}

.receipt-item:last-child { border-bottom: none; }
.receipt-item:active { opacity: 0.7; }

.receipt-thumb {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--sage-light);
  flex-shrink: 0;
}

.receipt-thumb.placeholder {
  display: grid;
  place-items: center;
  color: var(--sage);
  font-size: 1.2rem;
}

.receipt-meta { flex: 1; min-width: 0; }

.receipt-meta .merchant {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.receipt-meta .sub {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--sage-light);
  color: var(--sage-dark);
  font-size: 0.7rem;
  font-weight: 600;
}

.receipt-amt {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
  white-space: nowrap;
}

.empty-state {
  text-align: center;
  padding: 36px 20px;
  color: var(--muted);
}

.empty-state .icon { font-size: 2.5rem; margin-bottom: 8px; }
.empty-state p { font-size: 0.9rem; line-height: 1.4; }

/* Bottom tab bar */
.tab-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  display: flex;
  justify-content: space-around;
  align-items: flex-end;
  height: var(--tab-h);
  padding: 6px 8px env(safe-area-inset-bottom, 0px);
  background: rgba(255, 251, 247, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(45, 62, 45, 0.06);
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 4px 4px;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 600;
  max-width: 90px;
}

.tab-btn svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.tab-btn.active { color: var(--sage); }

.tab-btn.scan-fab {
  position: relative;
  top: -18px;
  max-width: 72px;
}

.tab-btn.scan-fab .fab-circle {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--sage), var(--sage-dark));
  color: white;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 20px rgba(91, 127, 91, 0.45);
  margin-bottom: 2px;
}

.tab-btn.scan-fab .fab-circle svg {
  width: 26px;
  height: 26px;
  stroke: white;
}

.tab-btn.scan-fab span { color: var(--sage-dark); }

.tab-btn:active { opacity: 0.75; }

/* Forms */
.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--warm-white);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--sage);
  background: white;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.1s, opacity 0.15s;
  width: 100%;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--sage);
  color: white;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--sage-light);
  color: var(--sage-dark);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.btn-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.btn-row.horizontal {
  flex-direction: row;
}

.btn-row.horizontal .btn { flex: 1; }

/* Scan screen */
.scan-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}

.scan-hero {
  text-align: center;
  padding: 32px 16px;
}

.scan-hero .cam-icon {
  width: 88px;
  height: 88px;
  margin: 0 auto 16px;
  border-radius: 24px;
  background: var(--sage-light);
  display: grid;
  place-items: center;
  color: var(--sage);
}

.scan-hero h2 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.scan-hero p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.45;
}

#photoInput { display: none; }

.preview-photo {
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  background: var(--sage-light);
}

.ocr-banner {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--sage-light);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  font-size: 0.875rem;
  color: var(--sage-dark);
}

.ocr-banner.visible { display: flex; }

.spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid var(--sage-mid);
  border-top-color: var(--sage);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

.toggle-group {
  display: flex;
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 4px;
  gap: 4px;
}

.toggle-group button {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.toggle-group button.active {
  background: white;
  color: var(--sage-dark);
  box-shadow: var(--shadow);
}

.card-detect {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.card-detect .brand-select { flex: 1.2; }
.card-detect .last4-input { flex: 1; }

.settings-list {
  list-style: none;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.settings-item:last-child { border-bottom: none; }

.settings-item .left {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.settings-item .name { font-weight: 600; }
.settings-item .hint { font-size: 0.75rem; color: var(--muted); }

.inline-input {
  flex: 1;
  padding: 8px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--warm-white);
  font-size: 0.9rem;
  max-width: 140px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--muted);
  flex-shrink: 0;
}

.icon-btn:active { background: var(--bg); }
.icon-btn.danger { color: var(--danger); }

.export-preview {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.75rem;
}

.export-preview th,
.export-preview td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.export-preview th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.export-preview-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: -4px;
  padding: 4px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--sage);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 8px;
  padding: 4px 0;
}

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(28, 43, 28, 0.45);
  align-items: flex-end;
  justify-content: center;
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
}

.modal-overlay.open { display: flex; }

.modal {
  background: white;
  border-radius: 20px;
  padding: 20px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.modal h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.modal p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
  line-height: 1.4;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--tab-h) + 12px);
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: white;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 550;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 200;
  max-width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

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

.install-tip {
  background: var(--sage-light);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--sage-dark);
}

.install-tip strong { display: block; margin-bottom: 4px; }

.cat-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.hidden { display: none !important; }

.amount-input-wrap {
  position: relative;
}

.amount-input-wrap::before {
  content: "$";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-weight: 600;
}

.amount-input-wrap input {
  padding-left: 28px;
}

@media (min-width: 600px) {
  .screen { padding: 20px 24px 32px; }
}