:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1a1d23;
  --muted: #6b7280;
  --border: #e1e4e8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --error: #b91c1c;
  --success: #15803d;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

.container {
  max-width: 640px;
  margin: 40px auto;
  padding: 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

header {
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 4px;
  font-size: 24px;
  font-weight: 600;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.field input[type="text"],
.field input[type="number"],
.field input[type="date"],
.field textarea {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.field textarea {
  resize: vertical;
  font-family: inherit;
}

.radio-group {
  display: flex;
  gap: 12px;
}

.radio {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s;
}

.radio:hover {
  border-color: var(--accent);
}

.radio input[type="radio"] {
  accent-color: var(--accent);
  margin: 0;
}

.radio:has(input:checked) {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.06);
}

.hint {
  font-size: 12px;
  color: var(--muted);
  min-height: 16px;
  font-style: italic;
}

button[type="submit"] {
  margin-top: 8px;
  padding: 12px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.15s;
}

button[type="submit"]:hover:not(:disabled) {
  background: var(--accent-hover);
}

button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  min-height: 20px;
  font-size: 13px;
  text-align: center;
}

.status.error {
  color: var(--error);
}

.status.success {
  color: var(--success);
}

.hidden {
  display: none !important;
}

@media (max-width: 640px) {
  .container {
    margin: 0;
    border-radius: 0;
    border: none;
    box-shadow: none;
  }
}