:root {
  --bg: #eef2f7;
  --panel: #ffffff;
  --muted: #6b7280;
  --text: #0f172a;
  --accent: #135f00;
  --accent-strong: #02a00f;
  --error: #dc2626;
  --success: #16a34a;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

.card {
  width: min(480px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  box-shadow:
    0 20px 60px rgba(15, 23, 42, 0.08),
    0 6px 18px rgba(15, 23, 42, 0.06);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  margin: auto;
}

.card h1 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.card p.subtitle {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
}

.card .field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.card label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: -0.01em;
}

.card input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card input::placeholder {
  color: #9ca3af;
}

.card input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.card button {
  width: 100%;
  padding: 13px 16px;
  border: none;
  border-radius: 18px;
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.2s ease, opacity 0.2s;
  box-shadow: 0 12px 25px rgba(37, 99, 235, 0.18);
}

.card button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.25);
}

.card button:active {
  transform: translateY(0);
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.18);
  opacity: 0.95;
}

.card button[disabled] {
  cursor: not-allowed;
  opacity: 0.7;
  box-shadow: none;
}

.card .checkbox {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}

.card .checkbox input {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.card .hint {
  margin-top: 10px;
  font-size: 12px;
  color: #dc2626;
  display: none;
}

.card .response {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px dashed var(--border);
  min-height: 46px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card .response.success {
  border-color: rgba(34, 197, 94, 0.4);
  color: var(--success);
}

.card .response.error {
  border-color: rgba(248, 113, 113, 0.4);
  color: var(--error);
}