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

:root {
  color-scheme: light dark;
  --bg: #f1f5f9;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --radius: 16px;
  --shadow: 0 8px 32px rgb(15 23 42 / 8%);
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --surface: #1e293b;
    --text: #f8fafc;
    --muted: #94a3b8;
    --border: #334155;
    --shadow: 0 8px 32px rgb(0 0 0 / 30%);
  }
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

body {
  line-height: 1.5;
}

.app {
  max-width: 420px;
  margin: 0 auto;
  padding: max(1.5rem, env(safe-area-inset-top)) 1rem max(2rem, env(safe-area-inset-bottom));
}

.header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.logo {
  margin: 0;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.tagline {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.hidden {
  display: none !important;
}

.company-name {
  margin: 0 0 0.5rem;
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.rut-number {
  margin: 0;
  text-align: center;
  font-size: clamp(1.75rem, 8vw, 2.25rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.barcode-wrap {
  margin: 1.25rem auto 0.5rem;
  padding: 1rem 0.75rem;
  background: #fff;
  border-radius: 12px;
  overflow-x: auto;
  text-align: center;
}

#barcode {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
}

.barcode-hint {
  margin: 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn {
  appearance: none;
  border: none;
  border-radius: 12px;
  padding: 0.85rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: background 0.15s ease, transform 0.1s ease;
}

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

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgb(148 163 184 / 12%);
}

.btn-block {
  width: 100%;
}

.import-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

#form-title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.form-intro {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.optional {
  font-weight: 400;
  color: var(--muted);
}

.field input {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 1.05rem;
}

.field input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.field-hint {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.field-error {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  color: var(--danger);
}

.backup {
  margin-top: 1.25rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.backup summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  user-select: none;
}

.backup-actions {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.footer {
  margin-top: 1.5rem;
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: max(1.5rem, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow);
  z-index: 100;
  pointer-events: none;
}

.toast.show {
  animation: toast-in 0.2s ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}