* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f4f8;
  color: #242630;
}

.topbar {
  height: 64px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border-bottom: 1px solid #e4e6ed;
}

.brand {
  text-decoration: none;
  color: #111;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.back {
  text-decoration: none;
  color: #4f5565;
  font-weight: 600;
}

.container {
  max-width: 860px;
  margin: 26px auto;
  padding: 0 16px;
}

.card {
  background: #fff;
  border: 1px solid #dde0e8;
  border-radius: 14px;
  padding: 22px;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.7rem;
}

#tool-subtitle {
  margin: 0 0 18px;
  color: #61687a;
}

.form {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  font-size: 0.92rem;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  border: 1px solid #cfd4df;
  border-radius: 10px;
  min-height: 42px;
  padding: 8px 10px;
  font: inherit;
}

.actions {
  margin-top: 16px;
}

.btn {
  border: 0;
  border-radius: 10px;
  min-height: 44px;
  padding: 0 18px;
  font: inherit;
  font-weight: 700;
  color: #fff;
  background: #e5322d;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  margin-top: 12px;
  min-height: 20px;
  color: #5f6575;
}

.status.error {
  color: #b72020;
}

.status.ok {
  color: #1d8b4d;
}