:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --primary: #3a6bc4;
  --primary-dark: #2f5aaa;
  --text: #2c2c2c;
  --muted: #666;
  --border: #dce1e9;
  --error-bg: #fef0f0;
  --error: #c0392b;
  --error-border: #f5c6c6;
  --radius: 8px;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.09);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px;
  width: 100%;
  max-width: 520px;
}

.card--wide {
  max-width: 780px;
}

h1 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 14px;
  line-height: 1.6;
}

.form-group {
  margin-bottom: 20px;
}

.note {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.8;
  margin-top: 4px;
  margin-bottom: 10px;
}

.field-note {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 8px;
  line-height: 1.5;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.optional {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.8rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="file"],
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--text);
  background: #fff;
  transition: border-color 0.15s;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
}

textarea {
  resize: vertical;
}

input[type="file"] {
  padding: 8px;
  cursor: pointer;
}

.hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 5px;
  line-height: 1.5;
}

.hint a {
  color: var(--primary);
}

button,
.copy-btn {
  display: block;
  width: 100%;
  padding: 11px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  background: var(--primary);
  color: #fff;
  border: none;
}

button:hover,
button:not(:disabled):hover {
  background: var(--primary-dark);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.copy-btn {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
}

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

.alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 0.875rem;
}

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

.url-box {
  background: #f0f4ff;
  border: 1px solid #c5d3f0;
  border-radius: var(--radius);
  padding: 14px;
  word-break: break-all;
  font-size: 0.875rem;
  margin-bottom: 12px;
  line-height: 1.6;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

@media (max-width: 520px) {
  .card {
    padding: 28px 20px;
  }
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.register-link {
  font-size: 0.875rem;
  color: var(--primary);
  text-decoration: none;
}

.register-link:hover {
  text-decoration: underline;
}

.sender-nav {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.sender-nav a {
  color: var(--primary);
  text-decoration: none;
}

.sender-nav a:hover {
  text-decoration: underline;
}

.sender-nav__active {
  color: var(--text);
  font-weight: 600;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.history-table th,
.history-table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}

.history-table th {
  color: var(--muted);
  font-weight: 500;
}

.badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 99px;
  font-weight: 500;
}

.badge--active {
  background: #e6f4ea;
  color: #2e7d32;
}

.badge--expired {
  background: #f5f5f5;
  color: #888;
}

.badge--invalidated {
  background: #fdecea;
  color: #c62828;
}

.service-name {
  font-size: 0.85rem;
  font-weight: bold;
  color: var(--primary);
  margin-bottom: 20px;
}

.service-name a {
  color: inherit;
  text-decoration: none;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  background: #fafbfc;
}

.drop-zone--over {
  border-color: var(--primary);
  background: #f0f4ff;
}

.drop-zone input[type="file"] {
  display: none;
}

.drop-zone__text {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}

.drop-zone__filename {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
  margin: 0;
}

.message-box {
  background: #f0f4ff;
  border: 1px solid #c5d3f0;
  border-radius: var(--radius);
  padding: 16px;
  margin: 20px 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text);
}

.powered-by {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--muted);
  opacity: 0.6;
  margin-top: 24px;
  margin-bottom: -24px;
}

.powered-by a {
  color: inherit;
  text-decoration: none;
}

.powered-by a:hover {
  opacity: 0.8;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}

.label-row label {
  margin-bottom: 0;
}

.char-count {
  font-size: 0.8rem;
  color: var(--muted);
}

.char-count--warn {
  color: var(--error);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.checkbox-label a {
  color: var(--primary);
}

.legal-content {
  margin-top: 20px;
}

.legal-content section {
  margin-bottom: 24px;
}

.legal-content h2 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.legal-content p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
}

.legal-content ul {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
  padding-left: 20px;
  margin-top: 6px;
}

.legal-content a {
  color: var(--primary);
}

.btn-delete {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 2px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
}

.btn-delete:hover {
  border-color: var(--error);
  color: var(--error);
}

.btn-danger {
  background: var(--error);
  color: #fff;
  border: none;
  padding: 10px 24px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  margin-top: 16px;
}

.btn-danger:hover {
  opacity: 0.85;
}

.sender-nav__withdraw {
  color: var(--muted);
  font-size: 0.85rem;
}