.subscribe-form {
    max-width: 420px;
    margin: 0 auto;
    padding: 24px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

.subscribe-form__group {
    margin-bottom: 16px;
}

.subscribe-form__input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    box-sizing: border-box;
    transition: border-color .2s ease, box-shadow .2s ease;
}

.subscribe-form__input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}

.subscribe-form__input::placeholder {
    color: #9ca3af;
}

.subscribe-form__button {
    width: 100%;
    padding: 12px 18px;
    border: 0;
    border-radius: 8px;
    background: #2563eb;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s ease;
}

.subscribe-form__button:hover {
    background: #1d4ed8;
}

.subscribe-form__button:active {
    transform: translateY(1px);
}

.subscribe-form__hidden {
    display: none;
}

/* Optional modifiers */

.subscribe-form--compact {
    max-width: 320px;
    padding: 16px;
}

.subscribe-form--dark {
    background: #111827;
    border-color: #374151;
}

.subscribe-form--dark .subscribe-form__input {
    background: #1f2937;
    color: #ffffff;
    border-color: #374151;
}

        .subscribe-form--dark .subscribe-form__button {
            background: #3b82f6;
        }