:root {
  --paper: #EEF1EC;
  --ink: #14201D;
  --ink-soft: #56625C;
  --card: #FFFFFF;
  --teal: #0F5C55;
  --teal-dark: #0A403B;
  --drop: #1F7A45;
  --drop-bg: #E7F3EB;
  --rise: #B0431F;
  --rise-bg: #FBEAE3;
  --line: #D8DED9;
  --radius: 14px;
  --font-display: "Space Grotesk", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --font-body: "Inter", sans-serif;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.brand { display: flex; align-items: center; gap: 10px; }

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--teal);
  position: relative;
  flex-shrink: 0;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 2px solid var(--paper);
  border-radius: 3px;
  transform: rotate(45deg);
}

.brand h1 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}

.ghost-btn {
  background: transparent;
  border: 1.5px solid var(--teal);
  color: var(--teal-dark);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.ghost-btn:hover { background: var(--teal); color: #fff; }
.ghost-btn.active { background: var(--teal); color: #fff; }

.add-form {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.add-form input {
  flex: 1;
  padding: 13px 16px;
  border-radius: var(--radius);
  border: 1.5px solid var(--line);
  background: var(--card);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
}
.add-form input:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 92, 85, 0.15);
}

.add-form button {
  padding: 13px 20px;
  border-radius: var(--radius);
  border: none;
  background: var(--teal-dark);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}
.add-form button:hover { background: var(--teal); }
.add-form button:disabled { opacity: 0.6; cursor: default; }

.error {
  color: var(--rise);
  font-size: 0.85rem;
  margin: 4px 2px 16px;
}

.loading {
  color: var(--ink-soft);
  font-size: 0.85rem;
  margin: 4px 2px 16px;
}

.empty-state {
  color: var(--ink-soft);
  text-align: center;
  padding: 48px 20px;
  font-size: 0.95rem;
}

.product-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

/* Ticket card: a receipt-stub silhouette with a perforated seam */
.ticket {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 12px 14px;
  cursor: pointer;
  box-shadow: 0 1px 0 var(--line);
  border: 1px solid var(--line);
}

.ticket-img {
  width: 56px;
  height: 56px;
  border-radius: 10px;
  object-fit: contain;
  background: var(--paper);
  flex-shrink: 0;
}

.ticket-body { flex: 1; min-width: 0; }

.ticket-title {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  margin: 0 0 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ticket-prices {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}

.price-now {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
}

.price-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 999px;
}
.price-badge.drop { background: var(--drop-bg); color: var(--drop); }
.price-badge.rise { background: var(--rise-bg); color: var(--rise); }
.price-badge.flat { background: var(--paper); color: var(--ink-soft); }

.sparkline {
  width: 100%;
  height: 22px;
  display: block;
}
.sparkline polyline { fill: none; stroke: var(--teal); stroke-width: 2; }

.remove-btn {
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 1rem;
  cursor: pointer;
  padding: 6px;
  flex-shrink: 0;
}
.remove-btn:hover { color: var(--rise); }

/* Detail overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 32, 29, 0.45);
  display: flex;
  align-items: flex-end;
  z-index: 10;
}
.overlay[hidden] { display: none; }
@media (min-width: 640px) {
  .overlay { align-items: center; justify-content: center; }
}

.detail-panel {
  background: var(--card);
  width: 100%;
  max-width: 560px;
  max-height: 88vh;
  overflow-y: auto;
  border-radius: 20px 20px 0 0;
  padding: 20px;
}
@media (min-width: 640px) {
  .detail-panel { border-radius: 20px; }
}

.close-btn { margin-bottom: 12px; }

.detail-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 4px;
}

.detail-price-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 4px;
}
.detail-price-now {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 600;
}

.detail-stats {
  display: flex;
  gap: 18px;
  color: var(--ink-soft);
  font-size: 0.82rem;
  margin: 10px 0 18px;
  font-family: var(--font-mono);
}
.detail-stats strong { color: var(--ink); font-weight: 600; }

.detail-chart {
  width: 100%;
  height: 190px;
  display: block;
  margin-bottom: 4px;
}

.chart-caption {
  color: var(--ink-soft);
  font-size: 0.78rem;
  margin: 0 0 14px;
}

.detail-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--teal-dark);
  font-weight: 500;
  font-size: 0.9rem;
}