body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
}

.login-container,
.register-container {
    max-width: 400px;
    width: 100%;
    padding: 2rem;
    margin: 0 auto;
}

.card {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    background: white;
}

.card-body {
    padding: 2.5rem;
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    margin-bottom: 2rem;
    color: inherit;
    cursor: pointer;
}

.auth-logo-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.8rem;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.35);
}

.auth-logo:hover {
    text-decoration: none;
    color: inherit;
}

.auth-home-link a {
    color: #667eea;
    font-weight: 600;
    text-decoration: none;
}

.auth-home-link a:hover {
    text-decoration: underline;
}

.btn-login,
.btn-register {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: 8px;
    color: white;
    width: 100%;
    transition: all 0.3s ease;
}

.btn-login:hover,
.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

#alertContainer {
    margin-bottom: 1rem;
    min-height: 0;
}

.alert {
    border-radius: 8px;
    border: none;
    margin-bottom: 0;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.alert .d-flex {
    flex: 1;
    align-items: center;
}

.alert .btn-close {
    margin-left: 0.5rem;
    padding: 0.25rem;
    opacity: 0.7;
}

.alert .btn-close:hover {
    opacity: 1;
}

.alert-danger {
    background-color: #fee;
    color: #c33;
    border-left: 4px solid #dc3545;
}

.alert-success {
    background-color: #efe;
    color: #3c3;
    border-left: 4px solid #28a745;
}

.alert-warning {
    background-color: #fff8e1;
    color: #f57c00;
    border-left: 4px solid #ffc107;
}

.alert-info {
    background-color: #e3f2fd;
    color: #1976d2;
    border-left: 4px solid #17a2b8;
}

/* Стили для невалидных полей */
.form-control.is-invalid {
    border-color: #dc3545;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='m5.8 3.6 .4.4.4-.4m0 4.8-.4-.4-.4.4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-invalid:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

/* Скрываем стандартные invalid-feedback от Bootstrap, используем только alertContainer */
.invalid-feedback {
    display: none !important;
}

/* Улучшаем отображение alert с HTML содержимым */
.alert span {
    line-height: 1.6;
}

/* Дополнительные стили для правильного центрирования */
.container-fluid {
    width: 100%;
    padding: 0;
}

.row {
    margin: 0;
    width: 100%;
}

.col-md-6,
.col-lg-4,
.col-lg-5 {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

/* Медиа-запросы для мобильных устройств */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .login-container,
    .register-container {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }

    .auth-logo-icon {
        width: 52px;
        height: 52px;
        font-size: 1.6rem;
    }
}