:root {
  color-scheme: light;
  --bg: #eef3f7;
  --card: #ffffff;
  --line: #d7e0e8;
  --text: #13212f;
  --muted: #637486;
  --accent: #0e7490;
  --accent-strong: #155e75;
  --danger: #b42318;
  --danger-bg: #fef3f2;
  --success: #027a48;
  --success-bg: #ecfdf3;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background:
    radial-gradient(circle at top right, rgba(14, 116, 144, 0.12), transparent 30%),
    var(--bg);
  color: var(--text);
}

.shell {
  min-height: 100vh;
  padding: 32px 16px;
}

.card {
  max-width: 980px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 20px 60px rgba(19, 33, 47, 0.08);
}

.header,
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2,
p {
  margin-top: 0;
}

.badge {
  padding: 8px 12px;
  border-radius: 999px;
  background: #e0f2fe;
  color: #075985;
  font-weight: 600;
  text-transform: capitalize;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

dt {
  color: var(--muted);
  font-size: 0.9rem;
}

dd {
  margin: 6px 0 0;
  font-weight: 600;
}

.panel {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  margin-top: 24px;
}

#receiptFrame {
  width: 100%;
  min-height: 420px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8fafc;
}

.upload {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--muted);
}

input[type="file"] {
  padding: 12px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  background: #f8fafc;
}

button {
  border: 0;
  border-radius: 12px;
  padding: 14px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: white;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  opacity: 0.65;
  cursor: progress;
}

.alert,
.success {
  padding: 14px 16px;
  border-radius: 12px;
  margin-top: 16px;
}

.alert {
  color: var(--danger);
  background: var(--danger-bg);
  border: 1px solid #fecdca;
}

.success {
  color: var(--success);
  background: var(--success-bg);
  border: 1px solid #abefc6;
}

.hidden {
  display: none;
}

@media (max-width: 720px) {
  .card {
    padding: 18px;
    border-radius: 16px;
  }

  .header,
  .panel-header {
    align-items: flex-start;
    flex-direction: column;
  }

  #receiptFrame {
    min-height: 320px;
  }
}