.app {
    font-family: Arial, sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 3rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f4f6fb;
}

.view {
    display: none;
    max-width: 420px;
    width: 100%;
    text-align: center;
    background: #ffffff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
    gap: 1.25rem;
}

.view.active {
    display: flex;
    flex-direction: column;
}

.lead {
    color: #5f6b7d;
    margin: 0;
}

.card {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

label {
    text-align: left;
    font-weight: 600;
    color: #1f2937;
}

input[type="text"] {
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
}

button {
    cursor: pointer;
    border: none;
    border-radius: 8px;
    padding: 0.75rem;
    font-size: 1rem;
    transition: background 0.2s ease;
}

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

.card button[type="submit"] {
    background: #2563eb;
    color: #ffffff;
}

.card button[type="submit"]:hover {
    background: #1d4ed8;
}

.btn {
    background: #10b981;
    color: #ffffff;
}

.btn:hover {
    background: #0f9d6a;
}

.btn.secondary {
    background: #2563eb;
}

.btn.secondary:hover {
    background: #1d4ed8;
}

.btn.link {
    background: transparent;
    color: #2563eb;
    border: 1px solid #2563eb;
}

.btn.link:hover {
    background: rgba(37, 99, 235, 0.08);
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.feedback {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: #111827;
    color: #ffffff;
    padding: 0.75rem 1.25rem;
    border-radius: 999px;
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.25);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.feedback.visible {
    opacity: 0.9;
}

@media (max-width: 480px) {
    .app {
        padding: 2rem 1rem;
    }

    .view {
        padding: 1.5rem;
    }
}