:root {
  color-scheme: light dark;
  --brand: #2c6e49;
  --brand-dark: #1f4d33;
  --danger: #b3261e;
  --border: #d7dbdf;
  --bg: #f7f8fa;
  --text: #1c1f22;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.container.wide {
  max-width: 960px;
}

.site-header h1 {
  margin: 0 0 0.15rem;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: #555;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-weight: 600;
  margin: 1rem 0 0.3rem;
}

input[type="text"],
input[type="email"] {
  width: 100%;
  padding: 0.7rem 0.8rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

input[type="text"]:focus,
input[type="email"]:focus {
  outline: 2px solid var(--brand);
  border-color: var(--brand);
}

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin: 1.2rem 0;
}

.checkbox-row label {
  margin: 0;
  font-weight: 400;
}

.checkbox-row input {
  margin-top: 0.3rem;
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.errors {
  color: var(--danger);
  font-size: 0.9rem;
  margin: 0.2rem 0 0;
  padding: 0;
  list-style: none;
}

button, .btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  border: none;
  padding: 0.75rem 1.4rem;
  font-size: 1rem;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  margin-top: 1.2rem;
}

button:hover, .btn:hover {
  background: var(--brand-dark);
}

.btn-secondary {
  background: #6b7280;
}

.btn-secondary:hover {
  background: #4b5563;
}

.btn-danger {
  background: var(--danger);
}

.btn-danger:hover {
  background: #7a1a15;
}

.btn-small {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.table-wrap {
  overflow-x: auto;
}

.actions-cell {
  display: flex;
  gap: 0.4rem;
}

textarea {
  width: 100%;
  min-height: 4.5rem;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.copy-row {
  margin-bottom: 1.2rem;
}

.copy-row .btn-small {
  margin-top: 0.4rem;
}

.hint {
  font-size: 0.85rem;
  color: #666;
}

.qr-box {
  text-align: center;
}

.qr-box img {
  max-width: 220px;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: 0.5rem;
}

.link-box {
  word-break: break-all;
  background: #eef4ef;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem;
  font-family: monospace;
  font-size: 0.85rem;
}

.notice {
  background: #fff4e5;
  border: 1px solid #f0c987;
  border-radius: 8px;
  padding: 0.8rem 1rem;
  font-size: 0.9rem;
  margin: 1rem 0;
}

.count-badge {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  border-radius: 999px;
  padding: 0.1rem 0.7rem;
  font-size: 0.85rem;
}

.site-footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: #777;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --text: #e7e9ea;
    --border: #33383d;
  }
  .card, .link-box {
    background: #1f2225;
  }
  .notice {
    background: #3a2f1a;
    border-color: #6b5423;
    color: #f0d9a0;
  }
}