:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #d1d5db;
  --bg: #f3f4f6;
  --error-bg: #fee2e2;
  --error-border: #f87171;
  --error-text: #b91c1c;
  --muted: #6b7280;
  --badge-bg: #fbbf24;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: #111827;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

h1 {
  font-size: 1.8rem;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 1.5rem;
}

.upload-form {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.file-label {
  display: inline-block;
  padding: 0.65rem 1rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.file-label input[type="file"] {
  margin-left: 0.75rem;
}

button {
  padding: 0.65rem 1.5rem;
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--primary-dark);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error-box {
  padding: 0.9rem 1rem;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: 8px;
  color: var(--error-text);
  margin-bottom: 1.5rem;
}

.results {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 768px) {
  .results {
    grid-template-columns: 1fr;
  }
}

section {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
}

section h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.preview-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.preview-container img,
.preview-container embed {
  max-width: 100%;
  max-height: 500px;
  border-radius: 6px;
}

.info-grid,
.totals-grid {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 0.5rem 1rem;
  margin: 0 0 1.25rem;
}

.info-grid dt,
.totals-grid dt {
  color: var(--muted);
}

.info-grid dd,
.totals-grid dd {
  margin: 0;
}

.grand-total {
  font-weight: 700;
  font-size: 1.15rem;
}

.items-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.25rem;
}

.items-table th,
.items-table td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.6rem;
  text-align: left;
}

.items-table th {
  background: #f9fafb;
}

.items-table td.num {
  text-align: right;
}

.badge {
  display: inline-block;
  padding: 0.1rem 0.55rem;
  background: var(--badge-bg);
  border-radius: 999px;
  font-size: 0.8rem;
  color: #111827;
  font-weight: 600;
}