:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #17202a;
  --muted: #5d6d7e;
  --primary: #0a7c66;
  --primary-hover: #086754;
  --border: #dbe3ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: radial-gradient(circle at top, #e8f3ef 0%, var(--bg) 55%);
  color: var(--text);
}

.page {
  max-width: 760px;
  margin: 40px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

h1,
h2 {
  margin-top: 0;
}

label {
  display: block;
  margin-top: 12px;
  margin-bottom: 6px;
  font-weight: 600;
}

input,
textarea,
button {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 10px 12px;
  font-size: 15px;
}

textarea {
  resize: vertical;
}

button {
  margin-top: 14px;
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: var(--primary-hover);
}

.secondary {
  width: auto;
  margin-top: 0;
  padding: 8px 12px;
  background: #eef3f8;
  color: #283747;
}

.secondary:hover {
  background: #dde6ef;
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.row input {
  width: auto;
}

.statusBox {
  margin: 14px 0 18px;
  padding: 12px;
  border: 1px dashed #b8c7d7;
  border-radius: 10px;
  background: #f9fcff;
}

.qr {
  margin-top: 8px;
  width: 220px;
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.message {
  min-height: 20px;
  color: #1f5f96;
  margin-top: 10px;
}

.hint {
  color: var(--muted);
  margin: 8px 0 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.hidden {
  display: none;
}