body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: url('widescreen-1920x1080-1_processed_processed.png') no-repeat center center fixed;
    background-size: cover;
    position: relative;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh; /* Полная высота окна */
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Затемнение фона */
    z-index: -1;
}

header {
    text-align: center;
    padding: 20px;
    background-color: #c1e2b3;
    color: #fff;
    font-size: 24px;
}

header p {
    font-size: 14px;
    color: #333;
}

main {
    flex: 1 0 auto; /* Растягивает main, чтобы футер был внизу */
}

.form-container {
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 15px;
    position: relative;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #1e90ff;
    font-size: 14px;
}

input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 14px;
}

input:focus {
    outline: none;
    border-color: #1B1BB3;
    box-shadow: 0 0 5px rgba(27, 27, 179, 0.5);
}

/* Стили для валидации и ошибок */
.valid, .invalid {
    transform: scale(0);
    font-size: 12px;
    margin-top: 5px;
    display: inline-block;
    transition: all 0.3s ease;
}

.valid {
    color: #3910B5;
}

.invalid {
    color: #FD0007;
}

/* Стили для полей при валидации */
#email:valid, #password:valid, #last_name:valid, #first_name:valid, #status:valid, #phone:valid, #birthday:valid, #avatar:valid {
    border: solid 1px #1B1BB3;
    outline: none;
}

#email:invalid:focus, #password:invalid:focus, #last_name:invalid:focus, #first_name:invalid:focus, #status:invalid:focus, #phone:invalid:focus, #birthday:invalid:focus {
    border: solid 1px #FD0007;
    outline: none;
}

#email:placeholder-shown, #password:placeholder-shown, #last_name:placeholder-shown, #first_name:placeholder-shown, #status:placeholder-shown, #phone:placeholder-shown {
    border: solid 1px #ccc;
}

/* Анимация сообщений валидации */
#email:valid ~ .valid, #password:valid ~ .valid, #last_name:valid ~ .valid, #first_name:valid ~ .valid, #status:valid ~ .valid, #phone:valid ~ .valid, #birthday:valid ~ .valid, #avatar:valid ~ .valid {
    transform: scale(1);
}

#email:invalid:focus ~ .invalid, #password:invalid:focus ~ .invalid, #last_name:invalid:focus ~ .invalid, #first_name:invalid:focus ~ .invalid, #status:invalid:focus ~ .invalid, #phone:invalid:focus ~ .invalid, #birthday:invalid:focus ~ .invalid {
    transform: scale(1);
}

#email:placeholder-shown ~ .invalid, #password:placeholder-shown ~ .invalid, #last_name:placeholder-shown ~ .invalid, #first_name:placeholder-shown ~ .invalid, #status:placeholder-shown ~ .invalid, #phone:placeholder-shown ~ .invalid {
    transform: scale(0);
}

/* Стили для кнопки submit */
form:invalid input[type="submit"] {
    transform: scale(0);
    transition: all 0.3s ease;
}

form:valid input[type="submit"] {
    transform: scale(1);
    transition: all 0.3s ease;
}

input[type="submit"] {
    background-color: #1e90ff;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 10px;
}

input[type="submit"]:hover {
    background-color: #1c86ee;
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 10px;
}

/* Стили для подсказок */
.tooltip {
    display: none;
    position: absolute;
    background-color: #333;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    z-index: 10;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s ease, top 0.3s ease;
}

input:focus + .tooltip {
    display: block;
    opacity: 1;
    top: -40px;
}

/* Стили для аватара */
#avatarName {
    font-size: 12px;
    color: #555;
    margin-top: 5px;
    display: block;
}

footer {
    flex-shrink: 0; /* Предотвращает сжатие футера */
    text-align: center;
    padding: 10px;
    background-color: #c1e2b3;
    color: #333;
    font-size: 12px;
    width: 100%;
}