/* ========== RESET & BASE ========== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f1014;
  color: #ececec;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  font-size: 16px;
  line-height: 1.4;
  padding-bottom: env(safe-area-inset-bottom);
}

/* Desktop: constrain to phone-shaped column, center it on the page */
@media (min-width: 600px) {
  body {
    max-width: 480px;
    margin: 0 auto;
    box-shadow: 0 0 60px rgba(0,0,0,0.6);
    min-height: 100vh;
    border-left: 1px solid #2a2d36;
    border-right: 1px solid #2a2d36;
  }
  html {
    background: #060709;
  }
}

/* ========== COLOR SYSTEM ========== */
:root {
  --bg: #0f1014;
  --bg-elev: #1a1c22;
  --bg-elev-2: #23262e;
  --border: #2a2d36;
  --text: #ececec;
  --text-dim: #9da0aa;
  --text-faint: #6b6e78;
  --accent: #f4c542;       /* warm yellow — like the apsara notebook */
  --accent-dark: #d4a020;
  --success: #4ade80;
  --danger: #f87171;
  --upi: #60a5fa;
  --cash: #f4c542;
}

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* Hide number input spinners — cleaner mobile feel */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] { -moz-appearance: textfield; }

button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* ========== TOP BAR ========== */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}
.brand-mark {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--accent);
  color: #1a1a1a;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 16px;
  letter-spacing: -0.5px;
}
.brand-name { font-weight: 700; font-size: 15px; }
.brand-sub { font-size: 12px; color: var(--text-dim); margin-top: 2px; }

.back-btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  font-size: 28px;
  border-radius: 10px;
  background: var(--bg-elev-2);
  font-weight: 300;
}
.back-btn:active { background: var(--border); }

.page-title { flex: 1; }
.pt-main { font-weight: 700; font-size: 16px; }
.pt-sub { font-size: 12px; color: var(--text-dim); margin-top: 2px; }

.icon-btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--bg-elev-2);
  color: var(--text-dim);
}
.icon-btn:active { background: var(--border); }
.icon-btn.placeholder { background: transparent; }

/* ========== TOTALS BAR ========== */
.totals-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
  transition: max-height 0.2s ease, opacity 0.2s ease;
  max-height: 200px;
  overflow: hidden;
}
.totals-bar.hidden { max-height: 0; opacity: 0; border-bottom: none; }

.t-cell {
  background: var(--bg);
  padding: 10px 8px;
  text-align: center;
}
.t-cell.highlight { background: var(--bg-elev); }
.t-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-faint);
  margin-bottom: 2px;
}
.t-value {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ========== HOME ========== */
.home {
  padding: 20px 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.big-action {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 18px;
  border-radius: 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  transition: transform 0.08s ease;
}
.big-action:active { transform: scale(0.98); }
.big-action.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #1a1a1a;
  border-color: var(--accent-dark);
}
.big-action.primary .ba-sub { color: rgba(26,26,26,0.7); }
.big-action.secondary { border-color: var(--upi); }
.big-action.tertiary { border-color: var(--success); }

.ba-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(255,255,255,0.1);
  display: grid; place-items: center;
  font-size: 24px;
  font-weight: 300;
}
.big-action.primary .ba-icon { background: rgba(26,26,26,0.15); }

.ba-title { font-weight: 700; font-size: 17px; }
.ba-sub { font-size: 13px; color: var(--text-dim); margin-top: 2px; }

.more {
  margin-top: 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px 0;
}
.more summary {
  list-style: none;
  padding: 10px 16px;
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
}
.more summary::-webkit-details-marker { display: none; }
.mini-action {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.mini-action:active { background: var(--bg-elev-2); }

/* ========== RECENT ========== */
.recent {
  padding: 0 16px 32px;
}
.recent-head {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.recent-list {
  list-style: none;
  padding: 0;
  margin: 0;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.recent-list li {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.recent-list li:last-child { border-bottom: none; }
.recent-empty { color: var(--text-faint); justify-content: center; text-align: center; padding: 24px; }

.r-type {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.r-type.sale { background: rgba(244,197,66,0.15); color: var(--accent); }
.r-type.pur { background: rgba(96,165,250,0.15); color: var(--upi); }
.r-type.exp { background: rgba(248,113,113,0.15); color: var(--danger); }
.r-amt { margin-left: auto; font-weight: 700; font-variant-numeric: tabular-nums; }
.r-text { flex: 1; color: var(--text-dim); font-size: 13px; }

/* ========== FORM ========== */
.sale-form {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.amt-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.amt-field, .full-field, .remarks-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
}
.amt-field:focus-within, .full-field:focus-within, .remarks-field:focus-within {
  border-color: var(--accent);
}
.amt-field.upi:focus-within { border-color: var(--upi); }

.amt-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-faint);
  font-weight: 600;
}
.amt-label em {
  font-style: normal;
  color: var(--text-dim);
  margin-left: 2px;
}
.amt-field input, .full-field input, .remarks-field input {
  width: 100%;
  font-size: 24px;
  font-weight: 700;
  padding: 4px 0;
  font-variant-numeric: tabular-nums;
}
.amt-field.upi input { color: var(--upi); }
.amt-field input { color: var(--cash); }
.full-field input, .remarks-field input {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.full-field input[type="number"] {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}

.total-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: var(--bg-elev-2);
  border-radius: 12px;
  font-size: 14px;
  color: var(--text-dim);
}
.total-display strong {
  font-size: 22px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.quick-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-dim);
  transition: all 0.1s ease;
}
.chip:active, .chip.active {
  background: var(--accent);
  color: #1a1a1a;
  border-color: var(--accent);
  font-weight: 600;
}

.seg-group {
  display: flex;
  gap: 6px;
  background: var(--bg-elev);
  padding: 6px;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.seg-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.seg {
  flex: 1;
  padding: 12px;
  border-radius: 8px;
  background: transparent;
  color: var(--text-dim);
  font-weight: 600;
  font-size: 14px;
}
.seg.active {
  background: var(--accent);
  color: #1a1a1a;
}

.bill-preview {
  margin-top: 8px;
}
.bill-preview img {
  max-width: 100%;
  max-height: 180px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.form-actions {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 10px;
  margin-top: 8px;
}
.btn {
  padding: 16px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 16px;
  transition: transform 0.08s ease, background 0.1s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--accent);
  color: #1a1a1a;
}
.btn-ghost {
  background: var(--bg-elev);
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn-danger {
  background: rgba(248,113,113,0.1);
  color: var(--danger);
  border: 1px solid rgba(248,113,113,0.3);
}

.hint {
  font-size: 12px;
  color: var(--text-faint);
  text-align: center;
  margin-top: 4px;
  line-height: 1.5;
}

/* ========== TOAST ========== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--success);
  color: #0a0a0a;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  opacity: 0;
  transition: all 0.2s ease;
  pointer-events: none;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.toast.error { background: var(--danger); color: #fff; }

/* ========== DASHBOARD ========== */
.tabs {
  display: flex;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 69px;
  z-index: 40;
}
.tab {
  flex: 1;
  padding: 14px;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-dim);
  position: relative;
  border-bottom: 2px solid transparent;
}
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.dash-main { padding: 16px; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.stat-card.big {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--bg-elev), var(--bg-elev-2));
}
.stat-card.net {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(244,197,66,0.1), rgba(244,197,66,0.02));
}
.stat-card.neg { border-color: rgba(248,113,113,0.2); }
.stat-card.neg .stat-value { color: var(--danger); }

.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-faint);
  margin-bottom: 6px;
}
.stat-value {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.stat-card.big .stat-value { font-size: 28px; }

.section-h {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-faint);
  margin: 24px 0 10px;
  font-weight: 700;
}

.ledger {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  display: block;
  overflow-x: auto;
}
.ledger thead {
  background: var(--bg-elev-2);
}
.ledger th {
  text-align: left;
  padding: 10px 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-faint);
  font-weight: 600;
  white-space: nowrap;
}
.ledger td {
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  white-space: nowrap;
}
.ledger td.remarks { white-space: normal; max-width: 200px; color: var(--text-dim); }
.ledger .empty {
  text-align: center;
  color: var(--text-faint);
  padding: 24px;
}
.ledger .del-btn {
  background: none;
  color: var(--danger);
  font-size: 16px;
  padding: 4px 8px;
  border-radius: 4px;
}
.ledger .del-btn:active { background: rgba(248,113,113,0.1); }

.hist-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}
.hist-controls input {
  flex: 1;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  color: var(--text);
  font-size: 15px;
}

.export-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.export-row .btn { flex: 1; min-width: 140px; }
.import-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}