:root {
  --bg: #f3f5f8;
  --surface: #ffffff;
  --border: #e2e6ec;
  --text: #1a1d23;
  --muted: #6b7280;
  --blue: #0066da;
  --blue-h: #0052ae;
  --green: #00bd02;
  --yellow: #ffcb01;
  --danger: #d23b2e;
  --r: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
}

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 8px 24px rgba(0, 0, 0, .05);
  padding: 28px;
  width: 100%;
  max-width: 480px;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--yellow), var(--green), var(--blue));
}

.logo {
  display: block;
  height: 32px;
  margin-bottom: 20px;
}

h1 {
  font-size: 18px;
  margin: 0 0 4px;
}

.subtitle {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 20px;
}

label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 6px;
}

textarea, select, input[type="text"], input[type="password"] {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
}

textarea:focus, select:focus, input[type="text"]:focus, input[type="password"]:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 218, .12);
}

textarea {
  resize: vertical;
  min-height: 100px;
  margin-bottom: 16px;
}

select {
  margin-bottom: 20px;
}

button {
  width: 100%;
  background: var(--blue);
  color: #ffffff;
  border: none;
  border-radius: var(--r);
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

button:hover { background: var(--blue-h); }
button:disabled { opacity: .5; cursor: not-allowed; }

.result {
  margin-top: 20px;
  display: none;
}

.link-box {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.link-box input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  padding: 10px 12px;
  font-size: 13px;
}

.link-box button {
  width: auto;
  padding: 10px 16px;
}

.hint {
  font-size: 12px;
  color: var(--muted);
}

.hint.warn { color: #8a6d00; }
.hint.danger { color: var(--danger); }

.tabs {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.tabs a {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
}

.tabs a:hover, .tabs a.active {
  color: var(--blue);
}

.tabs a:last-child {
  margin-left: auto;
}

.users-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 13px;
}

.users-table th, .users-table td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
}

.users-table th {
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: .5px;
}

.delete-btn {
  width: auto;
  background: none;
  color: var(--danger);
  border: 1px solid var(--border);
  padding: 4px 10px;
  font-size: 12px;
}

.delete-btn:hover {
  background: var(--bg);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: normal;
  text-transform: none;
  letter-spacing: normal;
  color: var(--text);
}

.checkbox-label input {
  width: auto;
}

.secret-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-all;
  margin-top: 16px;
}