:root {
  --bg: #08111f;
  --panel: rgba(10, 18, 35, 0.92);
  --panel-2: #101b33;
  --text: #eef2ff;
  --muted: #9ca3af;
  --accent: #34d399;
  --border: rgba(148, 163, 184, 0.22);
  --danger: #f87171;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(52, 211, 153, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(96, 165, 250, 0.14), transparent 26%),
    linear-gradient(160deg, #020617, var(--bg) 55%, #0f172a);
  padding: 24px;
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 22px;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topnav a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
}

.hero {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.hero-points span {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 0.92rem;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
}

.subhead {
  margin: 0;
  max-width: 70ch;
  color: var(--muted);
  line-height: 1.6;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 22px;
  align-items: start;
}

.converter-card {
  margin-top: 22px;
}

.auth-card {
  margin-bottom: 22px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

.section-head.compact {
  margin-bottom: 16px;
}

.section-head h2,
.converter-block h3 {
  margin: 0;
}

.converter-grid {
  display: grid;
  gap: 18px;
}

.converter-group {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(2, 6, 23, 0.18);
}

.converter-group-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
}

.converter-group-head h3 {
  margin: 0;
  font-size: 1.15rem;
}

.converter-block {
  padding: 18px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.72);
  border: 1px solid var(--border);
}

.converter-block h3 {
  margin: 0 0 12px 0;
  font-size: 1rem;
}

select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.12);
}

.output-box {
  margin-top: 14px;
  padding: 14px;
  border-radius: 14px;
  background: rgba(2, 6, 23, 0.48);
  border: 1px solid var(--border);
}

.output-value {
  margin-top: 6px;
  color: #f8fafc;
  word-break: break-word;
}

.converter-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.stack-form {
  display: grid;
  gap: 14px;
}

.stack-list {
  display: grid;
  gap: 12px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(10px);
}

.field { margin-bottom: 16px; }

label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.95rem;
  color: #dbeafe;
}

input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.12);
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

button, .button-link {
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.primary { background: linear-gradient(135deg, var(--accent), #22c55e); color: #052e16; }
.secondary { background: #243248; color: var(--text); }

.error {
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: #fecaca;
}

.success {
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.35);
  color: #bbf7d0;
}

.preview {
  display: grid;
  gap: 18px;
}

.barcode-panel {
  border-radius: 18px;
  background: #fff;
  color: #111827;
  padding: 18px;
  overflow: auto;
}

.barcode-panel svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.details {
  display: grid;
  gap: 10px;
  color: #dbeafe;
  font-size: 0.98rem;
}

.details strong { color: #fff; }

.meta-box {
  padding: 16px;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.72);
  border: 1px solid var(--border);
}

.small {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

.tool-dashboard {
  display: grid;
  gap: 18px;
}

.tool-group {
  display: grid;
  gap: 14px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.tool-card {
  display: grid;
  gap: 6px;
  text-decoration: none;
  color: var(--text);
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.72);
}

.tool-card-title {
  font-weight: 700;
  font-size: 1rem;
}

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }

  .section-head {
    flex-direction: column;
    align-items: start;
  }
}

@media print {
  :root {
    --bg: #fff;
    --panel: #fff;
    --panel-2: #fff;
    --text: #000;
    --muted: #333;
    --border: #bbb;
  }

  body {
    background: #fff;
    padding: 0;
    color: #000;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .hero,
  .converter-card,
  .actions,
  .converter-actions,
  .small a,
  button,
  .button-link {
    display: none !important;
  }

  .shell {
    max-width: none;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .card {
    box-shadow: none;
    border: 1px solid #bbb;
    background: #fff;
    color: #000;
    padding: 12px;
    border-radius: 0;
  }

  .barcode-panel {
    padding: 12px;
    overflow: visible;
    border: 1px solid #bbb;
    border-radius: 0;
    margin-bottom: 12px;
  }

  .meta-box {
    background: #fff;
    color: #000;
    border: 1px solid #bbb;
    border-radius: 0;
    padding: 10px 12px;
  }

  .details,
  .details strong {
    color: #000;
  }

  .preview {
    gap: 12px;
  }

  .preview .meta-box:last-child {
    margin-bottom: 0;
  }

  .barcode-panel svg {
    max-width: none;
    width: 100%;
    height: auto;
  }

  @page {
    size: auto;
    margin: 8mm;
  }
}